CPT code 74270 – Barium enema radiologic examination

Key takeaways

CPT code 74270 describes a single-contrast barium enema of the colon, distinct from 74280 which covers the air-contrast (double-contrast) technique

The KUB is optional: 74270 covers the exam with or without it, so documentation must state whether one was performed

Modifier 26 (professional component) or TC (technical component) applies when the radiologist and facility bill separately, and global billing uses no modifier

Pabau’s claims management software streamlines 74270 claim submission and denial tracking in one workflow

CPT code 74270: definition and official descriptor

CPT code 74270 is officially described by the AMA as: Radiologic examination, colon; contrast (eg, barium) enema, with or without KUB. It falls under the Radiology section of the CPT codebook, specifically the Diagnostic Radiology subsection for the gastrointestinal tract.

The phrase “with or without KUB” means the code encompasses both scenarios. What it does NOT mean is that you can skip documenting whether a KUB was taken. The radiology report must state whether an abdominal plain film was obtained before the contrast study. A report that is silent on the KUB is a recurring denial trigger on audit.

What the procedure involves: clinical context

A single-contrast barium enema introduces liquid barium sulfate (or a water-soluble contrast agent in select patients) into the colon via a rectal catheter. The radiologist uses real-time fluoroscopic imaging to visualize the colonic mucosa as contrast fills and outlines the bowel lumen.

This procedure is used to evaluate a specific set of clinical indications where optical colonoscopy is contraindicated, incomplete, or not feasible:

• Diverticulosis or suspected diverticulitis (K57-series ICD-10 codes)
• Suspected or known colorectal obstruction
• Evaluation of a colostomy or anastomosis
• Patients who cannot tolerate bowel prep or sedation required for colonoscopy
• Incomplete colonoscopy where a proximal colon segment could not be visualized
• Assessment of inflammatory bowel disease extent (K50/K51 series)

The “with or without KUB” component refers to a preliminary abdominal plain film taken before contrast is administered. Some radiologists obtain it routinely to assess bowel prep adequacy; others skip it based on clinical context. Either approach is billable under 74270, but the radiology report must document the decision.

CPT 74270 vs 74280: key differences

74270 covers single-contrast technique; 74280 covers air-contrast (double-contrast) technique. The distinction matters because the two codes are mutually exclusive on the same date of service for the same patient.

The governing rule: select the code based on the technique documented in the radiologist’s procedure note, not on what was ordered. Say the referring clinician ordered an “air-contrast barium enema” and the radiologist switched to single-contrast because of patient tolerance. 74270 is then correct, and the report must explain why.

Related GI radiology codes to know

Coders billing colorectal and upper GI radiology often need to tell 74270 apart from adjacent codes. The table below covers the most common crossover points. Colonoscopy is the pairing payers question most, so check the documentation rules for 45378 before you bill both on one date.

Modifiers for CPT 74270

Modifier selection is where compliance risk concentrates on 74270 claims. The code is a “global” radiology service covering both the professional work (radiologist interpretation) and the technical work (equipment, staff, contrast). When two billing entities split those components, each must append the correct modifier. Otherwise the claim overpays one party and underpays the other.

Most common error: a 74270 billed globally, with no modifier, on a professional claim while another entity bills -26 for the same service. That creates a duplicate payment attempt for the professional component. Most payers will reject the second claim or recoup the payment on audit.

Hospital outpatient facility claims under OPPS are a separate case, because they carry no -TC modifier at all. The chart below maps each billing arrangement to its modifier.

Medicare reimbursement rates and RVUs

Medicare reimburses 74270 based on the CMS Physician Fee Schedule. Rates vary by MAC locality and are updated annually. The values below are national averages; use the CMS Physician Fee Schedule lookup tool for your specific locality and current year. You can also run the numbers through FastRVU’s 2026 RVU lookup for a real-time reimbursement estimate.

Once a 74270 claim pays, pull back the electronic remittance advice and reconcile the payment against the expected RVU-based allowable. That reconciliation step is where underpayments on this code get caught.

Payer and prior authorization requirements

No national coverage determination (NCD) governs diagnostic barium enema, so coverage is set by each Medicare Administrative Contractor’s Local Coverage Determination (LCD). Screening barium enema was handled separately under NCD 210.3 and its own G-codes, not 74270. Most MACs cover 74270 when medical necessity is established through an appropriate ICD-10 diagnosis code and documented clinical indication.

Colonoscopy has largely superseded barium enema for colorectal cancer screening, so Medicare will not cover 74270 as a routine screening service. Barium enema is no longer a recommended screening modality, and screening barium enema is not reported with 74270.

The code is payable for diagnostic indications only. The referring clinician’s order and the ICD-10 linkage must reflect a specific clinical question rather than a preventive examination.

Checking your MAC’s LCD before you submit is part of medical billing compliance on 74270. Commercial payers add their own layer, and some require prior authorization. Their rules vary widely:

• Some commercial plans require prior auth for any fluoroscopic GI study; others exempt it
• Medicaid coverage and rates vary by state and managed-care plan
• Prior auth requirements can change mid-year; verify at the time of scheduling, not only at the time of billing

Documentation requirements

A complete radiology report supporting a 74270 claim must include every element below. Auditors reviewing denied or queried claims look for these fields specifically.

• Procedure performed: explicitly states “barium enema” or “contrast enema” with a notation on whether single-contrast or air-contrast technique was used
• Contrast agent: names the agent (e.g., barium sulfate, gastrografin) and route (rectal)
• KUB status: states whether a preliminary abdominal plain film was obtained before the contrast study
• Fluoroscopic images: confirms real-time fluoroscopy was performed and images were acquired
• Radiologist interpretation: signed final report from the interpreting radiologist
• Clinical indication: ties the procedure to the referring clinician’s documented reason
• Findings and impression: describes what was seen and the radiologist’s diagnostic conclusion

A superbill that captures the procedure code, modifier, and linked ICD-10 diagnosis at the point of service reduces the documentation errors that surface at billing. The radiology report itself is the primary audit target, but the superbill is what the coder works from, so both must align.

A clean claim for 74270 needs a complete documentation chain before it leaves the practice. The order, the radiology report, the ICD-10 linkage, the modifier and the billing entity details must all agree.

Common denial reasons for CPT 74270 and how to avoid them

Most 74270 denials fall into a predictable set of categories. The table below covers each denial type, the most common root cause, and the corrective action. The remittance names each one with an adjustment reason code, which our guide to medical billing denial codes decodes.

A denial management routine catches most of these at the source. Flag every 74270 claim for a modifier check and an ICD-10 linkage review before submission. Then use claims management software that groups denials by code, so you can see whether one payer rejects 74270 more often than the rest.

ICD-10 codes commonly billed with CPT 74270

The ICD-10 diagnosis code on a 74270 claim must reflect a clinical indication that MAC LCDs recognize as medically necessary for a fluoroscopic colon study. The following codes are among the most frequently linked, according to AAPC’s radiology coding resources and CMS coverage guidance.

None of these codes are “guaranteed payable.” Each must be supported by the clinical documentation in the patient’s chart. Use the CrossCoder crosswalk tool to verify that your selected ICD-10 code is an accepted diagnosis pairing for 74270 under your MAC’s LCD before submitting.

A diagnosis code missing from the LCD’s supported list triggers a medical necessity denial, however accurate the procedure code is.

How claims management software reduces denials for CPT 74270

Most 74270 denials start with a claim that left the practice carrying the wrong code, the wrong modifier, or a diagnosis the LCD doesn’t list. Without a shared system, someone checks each claim by hand and then chases short payments one remittance at a time.

Pabau, the practice management and billing platform we build, sends claims to thousands of US payers through its Claim.MD clearinghouse integration. Your team submits the 74270 claim and follows its status in one place. When the remittance comes back, the payment can be checked against what the claim should have paid.

The result is a shorter loop from denial to resubmission. A rejected claim shows up where your biller already works, so the modifier or diagnosis fix goes back out before the claim ages.

Streamline your radiology billing workflow

Pabau’s claims management tools help radiology and GI practices submit accurate claims, track claim status, and reduce denials for codes like 74270.

Book a demo

Conclusion

The radiology report decides a 74270 claim. Code from the technique the radiologist documented rather than from the order, and the most avoidable denial on this code disappears.

The other fixes are cheap only if they happen before submission. A quick check of the modifier against the billing arrangement, and of the diagnosis against your MAC’s LCD, costs far less than an appeal. The trade-off is discipline, because the check only works if it runs on routine claims too.

Treat barium enema as a diagnostic study with a specific clinical question, and record why colonoscopy wasn’t the choice where that applies. Book a demo to see how Pabau tracks your radiology claims from submission to payment.

Continue your research

Need a framework for tracking clearinghouse denials? Denial codes in medical billing covers CARC and RARC codes used in remittance advice to explain 74270 and other claim rejections.

Want to understand how claims move through the payer ecosystem? Medical claims clearinghouse explains how EDI claim files are validated and forwarded to payers before payment.

Checking your eligibility before the procedure date? Insurance eligibility verification outlines how to confirm payer coverage and any authorization requirements before fluoroscopic studies are performed.

Billing an upper GI study instead? CPT code 74240 covers the single-contrast upper GI tract exam and its own billing rules.

Working with a swallowing study? CPT code 74230 explains how the pharynx and esophagus function study is coded and documented.

Frequently asked questions