CTs of the abdomen and pelvis are among the most frequently performed diagnostic tests and among the most frequently miscoded at radiology groups and hospital outpatient departments throughout the US. In the case of this code family, the distinction between the correct CPT code for CT abdomen/pelvis with contrast and the incorrect code will not be a slight variation on a payer audit screen-it will be obvious that there is an error between what is documented and what is billed and may result in denials, recoupments, or compliance concerns.
Choosing the right CPT code for CT abdomen and pelvis with contrast depends on performing and documentation of precisely what phases were completed, what contrast was administered, and what is precisely documented in the radiology report. If you get those three elements correct in every claim, billing for this family of codes becomes simple.
This comprehensive guide explains every aspect of coding CT abdomen and pelvis studies correctly in 2026: the entire code family defined, the criteria that dictate coding CT abdomen/pelvis with IV contrast versus without-and-with, all documentation issues and nuances, modifier guidelines, general payer rules and guidelines, specific examples of CTs of the abdomen/pelvis, and common coding errors made on this code family.
CPT Code for CT Abdomen and Pelvis with contrast: 74177 in Depth
CPT 74177 is the code that is billed for CT Abdomen and Pelvis with contrast- the CPT that you bill for the combined abdomen/pelvis CT scan when an IV contrast study only with one acquisition is performed and no pre-contrast set of images is acquired. This code represents a single study of the abdomen/pelvis where the entire scan covers both regions, in the same protocol, and only the IV contrast images are reviewed and interpreted. There is no prior, pre-contrast imaging study and there are no other contrast acquisition phases to interpret on this CPT. This is the CPT code billed for most indications including diagnosis and management of abdominal pain, infectious etiology, evaluation of inflammatory bowel disease, staging of abdominal malignancies and post-operative surveillance as well as venous assessment when an uncomplicated venous phase scan is all that is needed.
When Exactly Does 74177 Apply?
- IV contrast was given and reported in the radiology report
- A pre-contrast phase was not done - if a pre-contrast series was performed, then use 74178
- Both abdomen and pelvis were scanned - if only the abdomen was scanned then use the single region codes (74150, 74160, 74170)
- The exam was done as a single ordered, single protocol study and not as two individual studies that were separately ordered and separately reported
CPT Code for CT Abdomen and Pelvis With and Without Contrast: 74178
The CPT code for a CT abdomen pelvis with and without contrast is 74178. This CPT code represents a dual-phase protocol where a pre-IV contrast and post IV contrast CT examination is performed of the abdomen and pelvis. Both sets of images are obtained at one session and read together by the radiologist. The importance of performing pre-and post IV contrast images is the comparison which provides the original density of an organ that allows true enhancement to be assessed compared with baseline attenuation, which may not be seen on a contrast-only image. The value of both pre-and post IV contrast CT examination can be clearly seen in the workup of liver masses (where a enhancement pattern will often diagnose lesions) renal masses (where the detection of a solid and cystic mass is dependent on contrast enhancement), CT urography (where contrast enhancement with a delay after administration of IV contrast to allow for an excretory phase is mandatory) and adrenal characterization.
When Does 74178 Apply?
- The radiology report explicitly documents both a non-contrast acquisition and a contrast-enhanced acquisition during the same imaging session
- The protocol narrative confirms that pre-contrast images were obtained and interpreted alongside post-contrast images
- Both the abdomen and pelvis were covered in the combined study
- CT urography is one of the most common indications for CPT 74178 because the protocol typically includes both non-contrast and post-contrast imaging phases.
When Not to Use the CPT Code for CT Abdomen and Pelvis With Contrast
Just as there are clinical indications where a CT abdomen and pelvis with IV contrast is appropriate, there are indications where 74177 should not be billed:
Suspected nephrolithiasis (kidney stones): IV contrast can reduce the conspicuity of urinary calculi, making non-contrast CT the preferred initial examination for suspected nephrolithiasis. Billing 74177 when stones are suspected is a medically unnecessary mismatch and is often audited by payers.
Patient cannot tolerate IV contrast due to allergy or end stage renal disease: Patients with severe renal impairment may require individualized assessment regarding IV contrast use based on current institutional protocols and clinical guidelines.
Only oral contrast was administered: As discussed, "contrast" in this context is IV contrast, oral contrast is not considered contrast for billing purposes. A report documenting "oral contrast administered" and no mention of IV contrast should be billed with 74176.
Only one anatomic region scanned: If the CT covers the abdomen only (not extending into the pelvis), the applicable codes are 74150 (without), 74160 (with), or 74170 (without and with). Similarly, pelvis-only CT uses 72192, 72193, or 72194. The combined 74176–74178 family requires documentation of both anatomic regions in a single protocol.
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
- 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.
- 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.
- 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.
- 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.
- 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
- 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.
- 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.
- 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.
- 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.
- 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.
