CPT Code 71250: Chest CT Without Contrast (2026 Billing Guide)

Quick Answers

CPT code 71250 is a diagnostic radiology code that reports computed tomography of the thorax performed without contrast material. It covers a cross sectional study of the lungs, mediastinum, pleura, great vessels, and chest wall. Contrast status is the only thing separating it from 71260 and 71270, and the radiology report, not the order, determines which of the three is correct.

• What it covers: A complete non contrast CT acquisition of the thorax, including high resolution protocols for interstitial lung disease, because no separate HRCT code exists.
• How it gets billed: Append modifier 26 for the interpretation, modifier TC for the equipment and staff, or no modifier at all when one entity does both.
• What changed in 2026: CMS applied a 2.5 percent efficiency adjustment to work RVUs for diagnostic imaging, so the professional component does not capture the full conversion factor increase.

What CPT Code 71250 Covers

The AMA descriptor is precise, and every billing decision on this code traces back to it: 71250, computed tomography, thorax, diagnostic; without contrast material.

The exam evaluates every structure inside the thoracic cavity. That includes the lungs and lung parenchyma, the airways, the pleural spaces, the mediastinum and mediastinal lymph nodes, the pericardium, the thoracic aorta and great vessels without vascular enhancement, the chest wall, the ribs, the thoracic spine, and the diaphragm. Thin section axial images and the standard reconstructions that go with them, including multiplanar reformats where clinically indicated, are considered inherent to the base service and are not separately reportable.

One point trips up coders more than any other on this code: high resolution CT of the chest is reported under 71250. There is no separate HRCT code. A high resolution protocol ordered to work up suspected interstitial lung disease is still 71250 as long as no contrast is administered. The acquisition protocol does not change the code. Contrast status does, and nothing else does.

The most common issue we see providers run into is a mismatch between the order and the report. A physician orders a chest CT with contrast, the patient turns out to have a contrast contraindication, the technologist runs the study without it, and the charge goes out as 71260 because that is what the order said. The report says otherwise. That claim is wrong on submission, and when it is caught in a post payment review it becomes a refund rather than a denial.

It is also worth separating 71250 from a limited follow up study. A complete thoracic acquisition is 71250. A limited or localized follow up look is 76380. The same distinction between complete and limited studies runs through the rest of the non contrast CT family, including CT of the head without contrast, CPT 70450.

71250 vs 71260 vs 71270

These three codes describe the same anatomy and the same acquisition. They are mutually exclusive within a single imaging session for the same thorax, and they are distinguished by one variable only: whether contrast was administered, and when.

The failure mode worth guarding against is 71270. A two phase study earns 71270 only when non contrast images were acquired first and then contrast was given and further sections were obtained. A single post contrast acquisition is 71260, not 71270, no matter how the order was written. Billing 71270 for a single phase study is an upcode, and it is one that a payer audit finds easily because the report documents the phases.

When a chest CT is performed alongside other body regions in the same session, each region carries its own code. A chest, abdomen, and pelvis study is billed as a thoracic code plus the appropriate abdominopelvic code such as CT of the abdomen and pelvis, CPT 74176. Bundling edits from the National Correct Coding Initiative govern which combinations are payable together, so the pairing has to be checked against current NCCI edits rather than assumed.

Is CPT 71250 used for lung cancer screening?

No. CPT 71250 is a diagnostic code that requires a clinical indication. Low dose CT lung cancer screening in an asymptomatic high risk patient is reported with CPT 71271, or with HCPCS G0297 for Medicare beneficiaries. Billing 71250 for a screening study is a coverage mismatch and it will be denied.

The distinction is not cosmetic, because the two pathways have completely different requirements. Medicare covers screening LDCT through a national coverage determination that sets specific eligibility criteria: an age range of 50 to 77, a tobacco smoking history of at least 20 pack years, and either current smoking or having quit within the last 15 years. It also requires a documented counseling and shared decision making visit before the first screening exam. A diagnostic order almost never carries any of that documentation, which is exactly why the two claims cannot be swapped.

Providers often come to us after a run of chest CT denials that traced back to this single boundary. A patient with a known nodule under surveillance is diagnostic. A patient with no symptoms and no prior finding who is being screened because of smoking history is screening. When the front desk or the scheduler makes that call instead of the ordering physician, the code follows the wrong pathway and the claim does not survive.

The Modifier 26 and TC Split

Every diagnostic imaging service has two halves. The technical component covers the equipment, supplies, technologist time, and facility overhead of acquiring the images. The professional component covers the physician supervision, interpretation, and the written report. How 71250 is reported depends entirely on who performed which half.

• Global, no modifier. One entity owns the equipment and interprets the study, such as a physician owned imaging center that scans and reads in house.
• Professional only, 71250-26. A radiologist interprets a study acquired on equipment they do not own, such as an outside reader covering a hospital.
• Technical only, 71250-TC. A facility owns the equipment and staffs the scan but sends the interpretation out.

Payment splits roughly 60 percent to the technical component and 40 percent to the professional component, which reflects the cost of equipment and staffing against the cost of the read. Place of service drives the mechanics. A hospital reports the technical side on its institutional claim, and when the radiologist is hospital employed the professional component is captured through the hospital rather than billed separately. A physician who performs a service in a facility setting appends only modifier 26.

Across the billing companies we vet, a recurring pattern separates the strong operators from the weak ones on this exact point. The strong ones map every study to a component scenario before the claim goes out, using the same discipline they apply to a two-view chest X-ray, CPT 71046. The weak ones bill global by default and let the payer sort it out. On a code volume as high as chest CT, a small systematic component error is not small. It compounds quietly across an entire year.

CPT 71250 Reimbursement in 2026

71250 is priced under the Medicare Physician Fee Schedule, where the work relative value unit is multiplied by the annual conversion factor and the total splits between the professional and technical components when two entities divide the service. Two things changed in 2026 that make the arithmetic different from prior years, and both of them cut against diagnostic imaging.

First, the conversion factor. In the CY 2026 Physician Fee Schedule Final Rule, published October 31, 2025, CMS finalized two separate conversion factors for the first time. Physicians in qualifying Advanced Alternative Payment Models are paid at $33.5675, a 3.77 percent increase over 2025. Everyone else is paid at $33.4009, a 3.26 percent increase. Most community radiology practices cannot participate in a qualifying APM, so the majority will be paid at the lower of the two rates.

Second, and more consequentially, CMS finalized a negative 2.5 percent efficiency adjustment applied to work RVUs and the intraservice portion of physician time for nearly all non time based services. The agency named diagnostic imaging interpretation as a target category explicitly. It reaches roughly 7,700 HCPCS codes, exempts evaluation and management and other time based services, exempts codes newly effective January 1, and CMS has stated it intends to reapply the adjustment every three years. The practical result is that the professional component on 71250 does not capture the full conversion factor increase. On the American College of Radiology preliminary read of the CMS impact tables, diagnostic radiology lands at roughly negative 2 percent overall for 2026 while interventional radiology gains about 2 percent.

The detail most practices miss is where the cut was applied. Because the efficiency adjustment reduced the RVU rather than the conversion factor, any commercial payer that prices off published MPFS relative values inherits the reduction automatically, without renegotiating anything. Practices should confirm whether their commercial contracts reference the 2026 RVU file, then model their own top codes against the new values rather than relying on the headline conversion factor increase. Alongside this, CMS changed how it allocates indirect practice expense RVUs for facility based physicians, which affects hospital based radiology groups on top of the work RVU cut.

Medical Necessity and Frequency Limits

The code describes what was performed. The diagnosis is what gets it paid. Payers cover a diagnostic chest CT when the order is supported by documented signs, symptoms, or history, such as a pulmonary nodule identified on a prior study, suspected interstitial lung disease, hemoptysis, persistent unexplained cough, suspected malignancy, pleural disease, or thoracic trauma. Coverage logic usually lives in a local coverage determination or a commercial medical policy with a defined list of supported diagnoses, so the ordering diagnosis has to map to a covered indication rather than a vague complaint.

Frequency is a separate gate that catches practices off guard. Some payer policies limit computed tomography of the same anatomical area, counted across 71250 through 71270 and 76380, to two studies within a rolling twelve month period, with anything beyond that subject to medical review of the supporting documentation. Surveillance imaging on a pulmonary nodule can bump against that ceiling fast, which means the prior imaging history matters before the scan is scheduled, not after the denial arrives.

One question we hear constantly from practice managers is whether they still need to run chest CT orders through an appropriate use criteria consultation. They do not. CMS paused the Appropriate Use Criteria program and rescinded its implementing regulations in the CY 2024 Physician Fee Schedule Final Rule. No claim was ever denied and no payment penalty was ever applied during the testing period. Teams still maintaining that workflow are spending effort on a rescinded rule instead of on the radiology benefit manager prior authorization that genuinely does deny. For appropriateness of the study itself, the American College of Radiology guidelines remain the reference standard.

How do you prevent CPT 71250 denials?

Most chest CT denials come from a handful of repeatable process gaps rather than genuinely difficult coding calls. Work these seven controls into the pre submission review and the majority of them stop happening.

1. Code from the report, not the order. Confirm the documented contrast status before selecting between 71250, 71260, and 71270.
2. Confirm the component split on every claim. Verify who owned the equipment and who wrote the interpretation, then apply modifier 26, modifier TC, or no modifier accordingly.
3. Route screening studies away from 71250. Send asymptomatic high risk lung cancer screening to CPT 71271 or HCPCS G0297 with its own eligibility documentation.
4. Check the prior thoracic imaging history. Confirm the study will not exceed a payer frequency limit before it is scheduled.
5. Secure prior authorization before the scan. Record the radiology benefit manager reference number and approval scope, and escalate a denial to peer to peer review rather than rescheduling blindly.
6. Document a specific clinical indication in the order. Map it to a covered indication in the applicable coverage policy rather than submitting a nonspecific complaint.
7. Retire any leftover appropriate use criteria step. Redirect that staff time to the prior authorization and documentation checks that actually affect payment.

These controls are the baseline for any team handling imaging volume. If yours cannot run them consistently, that is usually a staffing and specialization problem rather than a training problem, and it is worth comparing what a dedicated radiology medical billing partner would catch that an overstretched in house biller currently does not.

Frequently Asked Questions

Note: CPT codes and descriptors are maintained by the American Medical Association and are reproduced here for reference. Coverage, component, frequency, and modifier rules vary by payer and by Medicare contractor, so verify against current policies, fee schedule files, and local coverage determinations before billing.