A CT of the abdomen and pelvis can look simple on an imaging schedule: one appointment, one scanner, one radiology report. The claim is less simple. The correct code depends on which body regions were imaged, whether qualifying contrast was used, whether noncontrast images were obtained first, who supplied the equipment, who interpreted the study, and what the payer expects for medical necessity and authorization.
CPT code 74177 is the combined abdomen-and-pelvis CT code used when both regions are examined with contrast. It is commonly seen in emergency, oncology, gastroenterology, surgical, trauma, and general diagnostic workflows. Yet several mistakes recur: oral contrast is treated as though it automatically makes the study “with contrast,” a radiologist bills the global service when only the interpretation was provided, or a without-contrast code is stacked with 74177 when the correct choice is the combined without-and-with-contrast code.
Medicare’s rules add another layer. The national CT coverage policy still requires the examination to be reasonable and necessary for the individual patient, and current claims must be supported by an order and sufficient clinical documentation. At the same time, Medicare’s Appropriate Use Criteria reporting program remains paused in 2026, so practices should not keep sending obsolete AUC consultation data simply because an old workflow still asks for it.
For practices that want a broader view of how documentation, authorization, coding, and payment fit together, MedIntelHub’s medical billing workflow guide follows the claim from scheduling through adjudication.
CPT 74177 at a Glance
| Question | Practical answer |
| What does 74177 represent? | A combined CT examination of the abdomen and pelvis performed with qualifying contrast. |
| Does it cover both body regions? | Yes. The abdomen and pelvis are included in the same code. |
| Does oral contrast alone qualify? | No. Oral and/or rectal contrast alone does not make the CT a “with contrast” study for CPT coding. |
| What if no qualifying contrast is used? | The combined abdomen/pelvis without-contrast code is generally 74176. |
| What if noncontrast imaging is followed by contrast imaging? | 74178 may apply when the required before-and-after phases are performed. |
| Can modifier 26 be used? | Yes, when the billing provider reports only the professional interpretation. |
| Can modifier TC be used? | Yes, when the technical component is billed separately and the payer/setting permits it. |
| Is contrast injection separately coded? | The injection work is included in the CT exam; the contrast material itself may have separate technical-side HCPCS reporting depending on setting and payer. |
| Is Medicare AUC reporting required in 2026? | No. CMS paused the program and removed the claim-reporting requirement effective January 1, 2024. |
What Is CPT Code 74177?
CPT 74177 is used when a diagnostic CT examination includes both the abdomen and the pelvis and the study is performed with qualifying contrast material.
That combined-body-region concept matters. If the order and images cover only the abdomen, an abdomen-only CT code is considered instead. If only the pelvis is examined, the pelvis code family is used. When the abdomen and pelvis are both scanned as one diagnostic examination, the combined 74176–74178 family is designed to describe the service.
CMS continues to list 74177 as a CT of the abdomen and pelvis with contrast. The most recent descriptor revision shown in the relevant Medicare billing article took effect January 1, 2025. In other words, the code remains current in 2026, but it is not a brand-new 2026 code.
The code identifies the imaging service. It does not by itself establish coverage, prove medical necessity, or tell the payer which entity performed the professional or technical component.
What Does “With Contrast” Mean for CPT 74177?
In everyday clinical conversation, “contrast” can refer to several substances given by different routes. Coding uses a narrower distinction.
For CT coding, a with-contrast code is supported by qualifying injected contrast, most commonly intravenous iodinated contrast for abdomen/pelvis imaging. The radiology report should identify the contrast used and, when applicable, the amount administered.
The American College of Radiology’s coding guidance makes an important distinction: oral and/or rectal contrast alone is not enough to assign a with-contrast CT code. Those agents may be clinically useful, but they do not change a noncontrast CT into 74177 by themselves.
That single detail prevents a common error. A patient may drink oral contrast before the scan, yet if no qualifying injected contrast is administered, the coding team should not jump to 74177 solely because the chart says “contrast.”
A simple example
Suppose the abdomen and pelvis are scanned after the patient drinks oral contrast, but no IV contrast is administered. The presence of oral contrast does not, by itself, make the study 74177. The coding decision should follow the actual imaging protocol and current CPT guidance.
Now change the facts: the same combined abdomen/pelvis study is performed after IV iodinated contrast is administered. If no precontrast diagnostic phase changes the code selection, 74177 is the code family to review.
What Anatomy Is Included in CPT 74177?
CPT 74177 is a combined abdomen-and-pelvis service. The code is not an abdomen-only code with the pelvis added informally, and it is not a pelvis-only code.
That means billing staff should compare the order and radiology report with the actual anatomy examined. If the radiologist documents only an abdominal CT with contrast, the abdomen-only code family should be reviewed. If the study is pelvis only, the pelvis family applies.
For reference, CMS’s current code tables continue to distinguish:
- 74160 — abdomen with contrast
- 72193 — pelvis with contrast
- 74177 — combined abdomen and pelvis with contrast
The point is not to split a combined examination into smaller pieces to create more lines. The claim should reflect the service that was actually ordered and performed.
CPT 74176 vs. 74177 vs. 74178
The three combined abdomen/pelvis CT codes are easy to confuse because the anatomy is the same. The difference is the contrast sequence.
| Code | General contrast pattern | Practical distinction |
| 74176 | Without qualifying contrast | Combined abdomen and pelvis; no qualifying injected contrast for the study |
| 74177 | With qualifying contrast | Combined abdomen and pelvis with contrast |
| 74178 | Without contrast followed by contrast-enhanced imaging | A true before-and-after contrast study meeting the code requirements |
74176: without contrast
Use the without-contrast family when the abdomen and pelvis are imaged without qualifying injected contrast. Oral or rectal contrast alone does not convert the service to 74177.
74177: with contrast
Use the with-contrast family when the combined abdomen/pelvis study is performed with qualifying contrast and there is not a separately reportable precontrast phase that changes the code to 74178.
74178: without and with contrast
74178 is used when the protocol includes diagnostic imaging without contrast followed by contrast administration and additional imaging meeting the requirements of the without-and-with-contrast service.
This is not the same as adding 74176 and 74177 together. The 2026 Medicare NCCI policy manual reinforces the broader radiology principle that separate codes exist for studies performed without contrast, with contrast, and without followed by with contrast. When a single code describes the full sequence, coding should follow that structure rather than creating a pair of codes to represent the phases.
Why 74176 and 74177 Should Not Be Stacked to Create a “Before and After” Study
One of the easiest ways to overcode a CT encounter is to treat each phase as a separate examination.
Imagine a patient receives an abdomen/pelvis CT without contrast. The technologist then administers IV contrast and obtains additional diagnostic images as part of the same planned examination. The correct analysis is not, “We performed a 74176 and then a 74177.” The coding team should determine whether the full study meets 74178.
This matters because the code family already accounts for the contrast sequence. Adding the without-contrast and with-contrast codes together can misstate the service and create payer edits.
A related point: delayed images or routine reconstructions that are part of the CT examination are not automatically separate billable services. Radiology coding should follow the defined code structure, not the number of image series saved in PACS.
CPT 74177 vs. CT Angiography
A contrast-enhanced CT is not automatically CT angiography.
Standard CT abdomen/pelvis with contrast and CTA abdomen/pelvis use different protocols and different code families. CTA is designed around vascular evaluation and typically involves contrast timing, thin-section acquisition, and dedicated vascular postprocessing/reconstruction requirements.
For abdomen and pelvis CTA, the coding team would look to the 74174 family rather than 74177 when the examination truly meets CTA requirements.
Do not choose the angiography code simply because IV contrast was injected or because arteries are visible on the images. The radiology order, protocol, reconstruction work, and final report should support the service billed.
Does CPT 74177 Include Contrast Administration?
The work of administering contrast for the CT examination is included in the imaging service. The ACR specifically notes that a separate injection code is not used simply for the contrast administration that is part of the CT.
That does not mean the contrast material itself can never appear elsewhere on the claim.
Depending on the setting and payer, the technical entity may separately report the contrast material with the appropriate HCPCS code. Medicare’s 2026 NCCI policy manual, for example, discusses low-osmolar contrast HCPCS codes whose selection depends on iodine concentration.
The distinction is useful:
- Injection/administration work: generally part of the CT service.
- Contrast material: may have separate technical-side reporting rules.
A radiologist who only reads the study should not assume that a contrast-supply charge belongs on the professional claim. The facility, imaging center, or other technical provider usually controls the drug/supply side of the encounter.
Professional and Technical Components of CPT 74177
Diagnostic imaging often involves two different kinds of work:
- Technical work — scanner, technologist, supplies, image acquisition, and related technical resources.
- Professional work — physician interpretation and formal report.
CPT 74177 can be billed globally when one entity legitimately provides and bills both components. When the components are split, modifiers identify the portion being reported.
Modifier 26: professional component
Modifier 26 is used when the billing provider reports only the professional interpretation.
A common example is a hospital outpatient CT. The hospital owns the scanner and employs the technologist, while an independent radiology group interprets the exam. The radiologist may report 74177-26 for the professional component, subject to payer and contractual rules.
The medical record should include a formal interpretation/report that supports the professional service.
Modifier TC: technical component
Modifier TC identifies the technical component when it is billed separately under the applicable payment system.
The technical component generally reflects the equipment, technologist, image acquisition, and other technical resources. In some facility environments the technical side is handled through institutional billing rather than a professional claim line with TC, so the exact claim format depends on the setting.
Global billing
When the same eligible entity provides both the technical and professional components and the payer permits global billing, 74177 may be reported without 26 or TC.
The key is ownership and responsibility for the service—not which modifier produces the higher payment.
A Practical Component-Billing Example
A patient has a CT abdomen/pelvis with IV contrast at a hospital outpatient department. The hospital provides the scanner, technologist, contrast, and image acquisition. A separate radiology group reads the images and signs the final report.
The radiology group generally reports the professional component with modifier 26. The hospital handles the technical/facility side under its applicable billing structure.
Now move the same examination to a freestanding imaging center where one entity owns the scanner and employs or contracts the interpreting radiologist under arrangements that permit global billing. The claim structure may be global rather than split.
These are operational differences, not changes in the clinical CT protocol.
What Documentation Supports CPT 74177?
A clean 74177 claim starts with the order and the radiology record—not with the code itself.
The documentation should make it possible for a reviewer to understand why the study was needed, what was performed, how contrast was used, and who interpreted the examination.
Common documentation elements include:
- A valid order or referral when required
- The clinical indication or reason for the examination
- Relevant symptoms, known diagnosis, trauma, cancer history, or other medical context
- Confirmation that both abdomen and pelvis were examined
- The contrast route/type and amount when relevant
- A formal radiology report
- Findings and impression
- Identification of the interpreting physician
- Image retention according to applicable requirements
CMS’s national CT coverage policy says the scan must be reasonable and necessary for the individual patient based on the patient’s symptoms and preliminary diagnosis. The policy also notes that Medicare does not impose a universal rule requiring another diagnostic test to be tried before CT; the question is whether CT was medically appropriate for that patient.
The Order Matters
Diagnostic imaging claims can fail even when the radiologist’s report is excellent if the documentation trail does not establish that the study was properly ordered.
CMS’s CT coverage policy emphasizes the need for evidence that the test was ordered by the treating physician or qualified treating nonphysician practitioner in accordance with Medicare requirements.
The order should match the examination that was ultimately performed closely enough to support the service. When the imaging protocol changes after radiologist review, the organization should follow its payer, facility, and compliance procedures for documenting that change.
A standing assumption such as “CT abdomen/pelvis is always appropriate for abdominal pain” is not a substitute for an individualized order and medical-necessity record.
What Diagnosis Codes May Support 74177?
There is no single ICD-10-CM diagnosis that universally belongs with 74177.
The diagnosis coding should reflect the patient’s condition and the reason for the study. Depending on the encounter, that may involve symptoms, a known disease, trauma, postoperative concern, infection, malignancy evaluation, or another documented indication.
Examples of clinical situations in which a contrast-enhanced abdomen/pelvis CT may be considered include:
- Evaluation of certain abdominal or pelvic pain patterns
- Suspected infection or abscess
- Known or suspected malignancy
- Staging or surveillance when clinically appropriate
- Trauma assessment
- Postoperative complications
- Inflammatory processes
- Evaluation of a mass or abnormal prior imaging finding
These are clinical examples, not automatic coverage diagnoses. The applicable Medicare Administrative Contractor article, LCD, NCD, Medicare Advantage policy, or commercial payer policy controls coverage for the specific patient and date of service.
CMS’s CT abdomen/pelvis billing article contains diagnosis lists for its jurisdiction and has been updated over time as ICD-10-CM changes occur. Billing teams should use the current policy rather than an old diagnosis spreadsheet.
Medical Necessity Is More Than a Diagnosis Code
A covered-looking diagnosis on the claim does not repair a weak chart.
CMS NCD 220.1 requires the CT to be reasonable and necessary for the individual patient. That means a reviewer may look beyond the code pairing and ask whether the history, symptoms, prior findings, or treatment context support the study.
This has become especially visible in 2026. Noridian’s Jurisdiction E Part B medical review program has an active Targeted Probe and Educate review for CPT 74177. In results updated in February 2026, the contractor reported a high error rate in the reviewed claims and identified three recurring problems: records were not returned, submitted documentation was incomplete or insufficient, and the record did not support medical necessity under applicable coverage requirements.
That finding is jurisdiction-specific and not a national Medicare denial rate. It is still a useful reminder that 74177 can attract documentation scrutiny.
Prior authorization is not a single national rule for CT abdomen/pelvis.
Commercial insurers and Medicare Advantage plans may require authorization, site-of-service approval, or use of a radiology benefit manager. The requirement can depend on the plan, diagnosis, setting, network, and ordering specialty.
Traditional Medicare Fee-for-Service should be handled separately. Medicare’s Appropriate Use Criteria (AUC) program for advanced diagnostic imaging is currently paused. CMS states that, effective January 1, 2024, providers and suppliers should no longer include AUC consultation information on Medicare FFS claims.
That remains the CMS position in 2026.
So if an old CT workflow still forces staff to enter AUC consultation data for a traditional Medicare claim, the organization should review whether that field is still needed. AUC being paused does not remove medical necessity, ordering, coverage, or documentation requirements.
Medicare AUC Status in 2026
The AUC pause is one of the most important “2026 guidance” points because old educational materials can make it sound as though advanced imaging claims still need AUC reporting.
They do not under the current CMS program status.
CMS paused implementation and rescinded the AUC regulations effective January 1, 2024. It also directed providers to stop including AUC consultation information on Medicare FFS claims.
This means practices should distinguish between:
- AUC reporting: paused under Medicare FFS.
- Medical necessity: still required.
- Ordering documentation: still required.
- Plan-specific authorization: may still apply outside or in addition to traditional Medicare rules.
These are separate concepts.
Place of Service Can Change the Claim Structure
CPT 74177 may be performed in several settings, including hospital outpatient departments, freestanding imaging centers, physician offices with appropriate imaging capability, and independent diagnostic testing facilities.
The clinical code can stay the same while payment methodology changes.
For example:
- A hospital outpatient setting may separate facility billing from the radiologist’s professional claim.
- A freestanding imaging center may bill the technical component under the Physician Fee Schedule where applicable.
- A radiology group that reads images from multiple facilities may bill only modifier 26.
Do not hard-code one reimbursement amount into a training document. Medicare payment varies by locality, setting, component, year, and payment system.
CPT 74177 and Contrast-Material HCPCS Coding
The contrast material deserves its own verification step because coding depends on the actual product and concentration.
The 2026 Medicare NCCI policy manual notes that HCPCS codes for low-osmolar contrast material vary based on iodine concentration. That means the technical billing team should not pick a contrast HCPCS code only because it was used on the last CT claim.
The record should support:
- Product administered
- Concentration
- Amount used
- Units reported under the applicable HCPCS definition
- Payer and setting rules for separate contrast billing
The radiologist’s professional interpretation does not automatically include a separately payable contrast supply line on the professional claim.
Practical CPT 74177 Billing Examples
The examples below are simplified for education. Real claims should be checked against current CPT guidance, payer policy, the order, the final report, and the entity’s billing role.
Example 1: Hospital outpatient CT with IV contrast
A patient with worsening abdominal pain undergoes CT of the abdomen and pelvis with IV contrast at a hospital outpatient department. There is no diagnostic noncontrast phase first.
The radiology group that only interprets the images may report 74177-26. The hospital handles the technical/facility side under its billing rules.
Example 2: Freestanding center bills globally
A freestanding imaging center provides the scanner, technologist, IV contrast workflow, and professional interpretation under an arrangement that permits global billing.
The entity may report 74177 without 26 or TC, assuming the study and billing arrangement support global reporting.
Example 3: Oral contrast only
A patient receives oral contrast, but no qualifying injected contrast is administered. The abdomen and pelvis are scanned.
Do not choose 74177 solely because oral contrast was used. The without-contrast combined code should be reviewed instead.
Example 4: Noncontrast images followed by contrast-enhanced images
The patient undergoes diagnostic abdomen/pelvis imaging without contrast, then receives IV contrast and has additional diagnostic images as part of the same examination.
Review 74178 rather than stacking 74176 and 74177.
Example 5: Abdomen only
The order and report show a CT of the abdomen with IV contrast. The pelvis is not included.
The abdomen-only with-contrast code family should be used rather than 74177.
Example 6: CTA protocol
The study is specifically performed as CT angiography of the abdominal and pelvic vessels with angiographic timing and required postprocessing.
Review the CTA abdomen/pelvis code family rather than treating every contrast-enhanced vascular study as standard 74177.
Common CPT 74177 Coding Errors
Calling oral contrast “with contrast” for CPT selection
This is one of the most avoidable mistakes. Oral or rectal contrast alone does not support 74177.
Reporting 74176 and 74177 together for the same before-and-after study
When the examination includes noncontrast imaging followed by contrast-enhanced imaging that meets the combined service requirements, review 74178 instead.
Billing separate abdomen and pelvis codes for a combined study
When a single combined code describes the abdomen-and-pelvis examination performed, splitting the anatomy can create incorrect coding.
Using 74177 for abdomen only
Confirm that the pelvis was actually included in the ordered and performed study.
Confusing standard contrast CT with CTA
The presence of IV contrast does not automatically make a study angiographic.
Billing the wrong component
A radiologist who only interpreted the study should not bill the global service. Conversely, the technical provider should not claim professional work it did not perform.
Missing or weak ordering documentation
The final radiology report does not replace the need to establish that the diagnostic test was properly ordered under applicable rules.
Assuming a diagnosis guarantees medical necessity
Coverage is patient-specific. The history and documentation should explain why this CT was appropriate.
Keeping obsolete AUC claim fields active
For traditional Medicare FFS, CMS has paused the AUC program and removed the claim-reporting requirement.
Common Reasons 74177 Claims Are Denied or Delayed
A 74177 denial can originate well before the claim reaches a radiology coder.
Common causes include:
- Missing prior authorization when the patient’s plan requires it
- Authorization issued for the wrong body region or contrast status
- No order or an order that cannot be matched to the performed study
- Diagnosis-to-procedure mismatch
- Incomplete documentation of medical necessity
- Missing requested records during payer review
- Incorrect professional/technical modifier
- Duplicate or overlapping CT coding
- Incorrect contrast designation
- Billing the wrong entity or place of service
- Failure to meet a local coverage requirement
When a claim is denied, start with the payer’s actual remittance reason rather than automatically changing the code. MedIntelHub’s claim denial prevention and follow-up checklist provides a broader framework for reviewing authorization, coding, documentation, and appeal issues.
A 2026 Medicare Note: 74177 Is Under Active Review in One MAC Jurisdiction
There is no major new 2026 CPT code structure for 74177. The more practical 2026 story is documentation and review activity.
Noridian Jurisdiction E Part B is conducting a Targeted Probe and Educate review of 74177. Its February 2026 review-results page lists an error rate of 68.3% for the reviewed claims and identifies missing records, insufficient documentation, and lack of medical-necessity support as the leading denial reasons.
That percentage should not be presented as a national Medicare error rate or as evidence that 68.3% of all 74177 claims are wrong. TPE is targeted by design. Still, the results show exactly where a radiology group can become vulnerable during prepayment review.
A practical response is to make sure the billing provider can retrieve the supporting order and clinical records when Medicare requests them. A technically accurate professional-component claim can still be denied if the documentation package does not establish why the study was reasonable and necessary.
CPT 74177 Pre-Bill Checklist
Before releasing a 74177 claim, the billing team should be able to answer these questions from the current record:
- Were both the abdomen and pelvis imaged?
- Was qualifying injected contrast used?
- If oral or rectal contrast was used, was there also qualifying injected contrast supporting 74177?
- Was a diagnostic noncontrast phase also obtained that makes 74178 the better code?
- Does the order match the performed study?
- Does the documentation establish medical necessity?
- Is the diagnosis coding consistent with the reason for the exam and known findings?
- Is the billing entity reporting the global service, professional component, or technical component?
- If professional-only, is modifier 26 present?
- If technical-only on a professional claim format, is TC appropriate for the setting?
- Does the patient’s plan require prior authorization or site approval?
- Is the contrast material, if separately reported, coded to the correct product/concentration and units?
- Have duplicate or overlapping CT lines been checked?
- For Medicare FFS, has obsolete AUC reporting been removed from the workflow?
- Can the supporting order and medical-necessity records be produced if requested?
Frequently Asked Questions About CPT 74177
What does CPT 74177 mean?
It is the combined CT code for an examination of the abdomen and pelvis performed with qualifying contrast material.
Does 74177 include both the abdomen and pelvis?
Yes. If only one of those body regions is examined, the corresponding single-region code family should be reviewed instead.
Does oral contrast alone support CPT 74177?
No. ACR coding guidance states that oral and/or rectal contrast alone does not qualify a CT for a with-contrast CPT code.
What is the difference between 74176 and 74177?
74176 represents the combined abdomen/pelvis CT without qualifying contrast; 74177 represents the combined study with qualifying contrast.
What is the difference between 74177 and 74178?
74177 is the with-contrast study. 74178 describes a study that includes noncontrast imaging followed by contrast-enhanced imaging meeting the requirements of the before-and-after service.
Can 74176 and 74177 be billed together?
They generally should not be stacked simply to represent one combined before-and-after contrast examination. Review 74178 when that full sequence was performed.
Can a radiologist bill 74177 with modifier 26?
Yes, when the radiologist provides only the professional interpretation and the payer/setting supports separate component billing.
What does modifier TC mean with 74177?
TC identifies the technical component when that component is billed separately under the applicable claim and payment structure.
Does 74177 include the IV contrast injection?
The administration work used to inject contrast for the CT is included in the imaging service. The contrast material itself may have separate HCPCS reporting rules on the technical side.
Is the contrast material included in 74177 payment?
That depends on the payer and payment setting. The procedure code describes the CT exam; contrast material may have separate supply reporting in some technical billing situations.
There is no single rule that applies to every payer. Medicare Advantage and commercial plans may require prior authorization. Traditional Medicare FFS does not currently require AUC consultation reporting, but medical necessity and other Medicare rules still apply.
Does Medicare require AUC reporting for 74177 in 2026?
No. CMS paused the AUC program and instructed providers to stop including AUC consultation information on Medicare FFS claims effective January 1, 2024.
Can 74177 be used for CT angiography?
Not simply because contrast is present. A true CTA exam uses an angiographic protocol and belongs to the CTA code family when the coding requirements are met.
What diagnosis should be billed with 74177?
Use the diagnosis or symptom that accurately reflects the reason for the study and applicable coding rules. There is no single diagnosis that belongs on every 74177 claim.
Why might Medicare request records for a 74177 claim?
Medicare contractors may conduct medical review to confirm the study was reasonable and necessary and adequately documented. Noridian JE has an active 2026 TPE review for 74177.
What Matters Most When Billing CPT 74177
The code itself is not the difficult part. The difficult part is matching it to the actual imaging protocol and the correct billing role.
Start with four facts: anatomy, contrast, sequence, and component.
Both abdomen and pelvis must be part of the exam. Oral contrast alone does not create a with-contrast CPT study. A true noncontrast phase followed by contrast imaging may move the service to 74178. And the entity that only interprets the exam should not bill as though it also supplied the scanner and technologist.
For Medicare in 2026, two operational points deserve extra attention. AUC reporting remains paused, so old AUC claim fields should not drive current FFS billing. At the same time, medical necessity has not gone away. Noridian’s current 74177 review activity shows how quickly a claim can fail when supporting records are missing or insufficient.
A reliable workflow is therefore straightforward: verify the order, confirm the protocol, document the contrast correctly, choose the right component, check plan authorization requirements, and keep the medical-necessity record accessible before the claim leaves the billing system.
Resources
Centers for Medicare & Medicaid Services — Computed Tomography NCD 220.1
CMS’s national coverage policy explains the reasonable-and-necessary standard for CT and the importance of patient-specific symptoms, preliminary diagnosis, and ordering documentation.
CMS: Computed Tomography NCD 220.1
Centers for Medicare & Medicaid Services — Billing and Coding: CT of the Abdomen and Pelvis
This Medicare Coverage Database article includes current coding and diagnosis information for CT abdomen/pelvis services and shows the revision history for 74177.
CMS: CT of the Abdomen and Pelvis
American College of Radiology — Basic Coding: Technical Aspects of Imaging Modalities
ACR coding guidance explains CT contrast distinctions, including why oral or rectal contrast alone does not support a with-contrast CT code and why contrast injection work is included in the exam.
ACR: Basic Coding — Technical Aspects of Imaging Modalities
Centers for Medicare & Medicaid Services — Appropriate Use Criteria Program
CMS explains that the Medicare AUC program is paused and that AUC consultation information should no longer be included on Medicare FFS claims.
CMS: Appropriate Use Criteria Program
Noridian Medicare — CPT 74177 Targeted Probe and Educate Results
Noridian JE publishes current medical-review findings for 74177, including common denial reasons involving missing records, insufficient documentation, and medical necessity.
Noridian: CPT 74177 Review Results
Centers for Medicare & Medicaid Services — 2026 Medicare NCCI Policy Manual, Chapter 12
The 2026 NCCI manual includes current policy information on contrast-material HCPCS coding and other diagnostic-service billing principles.
CMS: 2026 Medicare NCCI Policy Manual — Chapter 12
Editorial Guidelines & Medical Disclaimer
This article is intended for educational and informational purposes. It does not replace the official CPT® code set, Medicare manuals, CMS National or Local Coverage Determinations, payer contracts, radiology practice parameters, prior-authorization rules, or professional coding advice for a specific claim.
CPT® is a registered trademark of the American Medical Association. MedIntelHub paraphrases coding concepts for education and does not reproduce the complete proprietary CPT descriptor or coding instructions. Practices should use a current, properly licensed CPT resource when assigning codes.
Coverage, authorization, component billing, place-of-service rules, contrast-supply reporting, payment rates, and documentation requirements can differ by payer and setting and may change over time. Before billing, verify the current code set, the patient’s plan requirements, applicable Medicare guidance, MAC policy, and the date-of-service rules that apply to the claim.
Clinical decisions about whether CT is appropriate, which protocol to use, and whether contrast should be administered belong to qualified healthcare professionals based on the individual patient’s condition. This article does not diagnose a condition or direct patient-specific imaging or treatment.
MedIntelHub develops medical and billing content using authoritative sources and reviews it for accuracy and clarity. Our Editorial Policy explains our approach to sourcing, updates, and corrections.
David Bennett
David Bennett is an author at MedIntelHub, where he creates clear, practical, and well-researched content about healthcare, medical billing, insurance, and patient education. His goal is to make complex healthcare topics easier for readers to understand and use in everyday situations. David emphasizes accuracy, transparency, and reliable sourcing, using information from trusted organizations and official healthcare resources whenever possible. Content published by David is intended for educational purposes and should not replace advice from qualified medical, legal, or healthcare professionals.