CPT Code for CT Abdomen and Pelvis With Contrast: Complete Coding Guide for 2026

Real-World Coding Scenarios: Choosing the Right Code

These scenarios represent the most common situations your coding team will encounter and illustrate how to select the correct CPT code for CT abdomen and pelvis with contrast in each case.

Scenario 1: CT abdomen/pelvis for ruling out appendicitis

A 28-year-old presents to the ED with right lower quadrant pain and elevated WBC. A CT abdomen and pelvis with IV contrast study is performed and the findings section includes documented contrast delivery, an abdominal/pelvic study performed in the portal venous phase, and findings consistent with acute appendicitis.

Correct CPT code: 74177 - CPT code for CT abdomen and pelvis with contrast.  It's a single phase contrast study of both anatomic regions. Use ICD-10 K37 (appendicitis, unspecified) or K35.80 (acute appendicitis without abscess) as determined by the radiologist. There is no modifier needed if services are billed globally by an independent radiology practice.

Scenario 2: CT Urogram for Haematuria

A 55-year-old male who presents with haematuria is referred for CT urography. The protocol includes a non-contrast, a contrast enhanced nephrographic and a delayed excretory phase for opacification of the ureters and collecting systems. The three phases are acquired and reviewed in the same session.

Correct code: 74178 - CPT code for CT abdomen and pelvis with and without contrast. CT urography typically includes a non-contrast phase followed by one or more post-contrast phases, including nephrographic and excretory imaging. Link with ICD-10 code such as R31.9 (Hematuria, unspecified), R31.0 (Gross hematuria), or another documented hematuria diagnosis. Do not unbundle with 74176 and 74177.

Scenario 3: CT Abdomen and Pelvis for Colorectal Cancer Staging

A patient with a newly diagnosed sigmoid adenocarcinoma requires pre-surgical staging. CT of chest, abdomen and pelvis with IV contrast has been obtained. Report of contrast enhanced portal venous phase imaging of chest, abdomen, and pelvis.

Correct code: 74177 for the abdomen and pelvis component with modifier 26 if billing professional component only. The chest component would be reported separately using the appropriate chest CT code (71250, 71260, or 71270) depending on the protocol performed. The chest cannot be combined into the 74177 code. The chest is an individual region to itself. Include diagnoses to reflect primary malignancy and the reason for the stage.

Documentation Requirements for the CPT Code for CT Abdomen and Pelvis With Contrast

Every claim for the CPT code for CT abdomen and pelvis with IV contrast must be supported by documentation that establishes three things: that IV contrast was administered, that both the abdomen and pelvis were imaged, and that the clinical indication justifies the study and the specific protocol used.

Radiology Report Must Include:

• Clear documentation of IV contrast administered, to include the specific agent used and dose when recorded
• Confirmation that both the abdomen and pelvis were included in the protocol
• The phase(s) acquired, typically one contrast-enhanced phase for 74177, or non-contrast and post-contrast phase for 74178
• The report should contain sufficient diagnostic findings and an interpretation supporting the billed service.
• The interpreting radiologist's impression and signature along with date and time of interpretation

The Ordering Provider's Note Should contain:

• Clinical reason for ordering the imaging study and contrast protocol.
• Confirmation of contrast contraindications for a non-contrast study or altered protocol.

Modifiers That Apply to the CT Abdomen and Pelvis Code Family

Modifier 26 - Professional Component

Use modifier 26 for CT abdomen and pelvis with contrast to bill for just the interpretation and written report by the radiologist. This includes all hospital outpatient, academic, and teleradiology situations where the physician does not own the imaging equipment. Failure to apply modifier 26 in a split billing scenario generates duplicate billing flags, thus may generate duplicate billing flags and can result in claim denials.

TC - Technical Component

Modifier TC may be used to report only the technical services rendered, that is, the CT scan, the technologist time, contrast, and the overhead for facility. When a facility (i.e. Hospital outpatient or independent imaging center) uses an independent radiologist for interpretation, the CPT for a CT of abdomen/pelvis with IV contrast will have TC billed with the facility claim.

Modifier 52 - Reduced Services

If a CT of abdomen/pelvis study was started but could not be completed (e.g. Due to severe allergic contrast reaction, severe motion artifact rendering portions of the study non-diagnostic, or an emergency need to stop study), modifier 52 may be applied. The service may be supplemented with information regarding the reduced service rendered.

Modifier 76- Repeat Procedure

Modifier 76 is used when the same procedure is repeated by the same physician or qualified healthcare professional on the same date of service. Medical necessity for the repeat examination must be clearly documented.

The 5 Most Common CT Abdomen and Pelvis Coding Mistakes

1. Billed 74177 with oral only contrast. The oral only contrast does not meet criteria for the CT abdomen and pelvis with contrast CPT code 74177. Confirm that IV contrast is present in the report prior to using this CPT code; if only oral contrast is present use 74176.
2. Unbundled 74176 and 74177 for the CT abdomen and pelvis with contrast instead of coding 74178. When non-contrast and contrast study phases are completed in one session, one CPT code 74178 is billed. Billing both 74176 and 74177 will be denied based on NCCI bundle edits.
3. Billed 74177 for evaluation of renal colic/kidney stones. Designed to be a non-IV contrast study renal colic protocols will be flagged as medically unnecessary with a coding mismatch. Use 74176.
4. Missed modifier 26 with professional component billing. If the radiologist does not own the imaging equipment a modifier 26 should be added to CPT code 74177. Coding the professional component as a global bill without modifier 26 while the facility bills TC for the scan will trigger duplicate billing flags in all of the payers systems.
5. Used regional codes instead of the combination code. In some instances,coders billed separate CT abdomen and CT pelvis CPT codes for a combined CT abdomen and pelvis. NCCI bundles CT abdomen and pelvis codes together under one CPT code 74177, 74176, or 74178.

How Rapid Claims Supports Accurate CT Abdomen and Pelvis Billing

CT abdomen/pelvis studies often hold large value as single claims, and the volume present in a radiology practice or hospital outpatient department means that even small, systematic coding errors add up to dollars lost and real compliance risk very quickly. Rapid Claims coding staff examine each CT abdomen/pelvis claim on a one-to-one basis against the radiology report before billing.

We review the contrast protocol outlined in the report; check if IV contrast was given and match the correct code (74176, 74177, 74178) to the correct protocol; bill the correct modifier based on your billing facility; review the ICD-10 diagnosis code for medical necessity; and look for prior authorizations required by your payer mix.

Final Word: Get the Protocol Right, Get the Code Right

The CPT code for CT abdomen and pelvis with contrast is not ambiguous once you understand the framework. One contrast-enhanced phase with no pre-contrast imaging: 74177. Non-contrast phase followed by contrast-enhanced phase in the same session: 74178. No IV contrast at all: 74176. Apply modifiers based on your billing setting. Support every claim with a radiology report that explicitly documents IV contrast administration, both anatomic regions, the imaging phases obtained, and organ-level findings.

What is the most prevalent CPT code for a CT abdomen & pelvis with IV contrast in the setting of outpatient radiology? CPT code 74177 should be billed only when IV contrast was administered and no non-contrast acquisition was performed. Once two phases were performed (and documented in the report), 74178 CT abdomen pelvis with and without contrast becomes the only applicable CPT code.

If your practice is receiving CT abdomen pelvis denials or payer audits for contrast protocol issues, or if you are interested in having your radiology billing accuracy comprehensively reviewed, feel free to contact Rapid Claims today. We will ensure that your CT abdomen & pelvis with contrast CPT codes accurately reflect your rendered services.

FAQs

1. What is the CPT code for a CT abdomen and pelvis with IV contrast?

The correct CPT code for a CT of the abdomen and pelvis using only intravenous contrast and without non-contrast imaging would be 74177.

2. What is the CPT code for a CT abdomen and pelvis with and without contrast?

The correct CPT code for a CT of the abdomen and pelvis using a non-contrast scan and a contrast scan would be 74178. This is appropriate when the non-contrast study is followed by at least one post-contrast study within the same examination.

3. When should CPT 74177 be reported over 74178?

You should report 74177 when the study only involves contrast imaging of the abdomen and pelvis. When both a non-contrast study and post-contrast studies are performed and interpreted in the same sitting, 74178 would be reported.

4. Would a CT of the abdomen and pelvis that included oral contrast be reported with 74177?

 No. CPT 74177 requires the administration of IV contrast. If the CT only includes oral contrast, it should be reported as a non-contrast CT of the abdomen and pelvis using CPT code 74176.

5. Can CPT 74176 and 74177 be billed together for the same CT abdomen and pelvis exam?

No. When both non-contrast and contrast studies are performed in the same session, the CPT code 74178 should be used. Billing 74176 and 74177 together would be a violation of the NCCI edits, and is considered unbundling.