CPT 76100Radiology

X-ray exam of body section

CPT code 76100 covers specialized X-ray imaging that creates detailed pictures of a cross-section or "slice" of your body, similar to cutting through a layer cake to see what's inside. This technique, called tomography, helps doctors see structures that might be hidden on regular X-rays.

Showing rates for

National Average

Base Medicare rate

$85.39

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

0.58

PE RVU (NF)

2.01

MP RVU

0.05

Total RVU

2.64

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Verify that conventional tomography is medically necessary and that CT or MRI are not more appropriate alternatives before performing the study
Impact: Prevents denials for lack of medical necessity; failure to document why advanced imaging was not appropriate can result in 100% denial ($85.39 loss per study)
Bill technical and professional components separately only when services are performed in different locations or by different entities; use modifiers 26 and TC appropriately
Impact: Incorrect component billing can delay payment by 30-45 days and may result in overpayment recovery audits
Document the specific anatomical area and number of body sections/planes imaged, as some payers may require multiple units for extensive multi-level studies
Impact: Proper unit billing can increase reimbursement by 100-300% for multi-level studies, though most payers limit to single unit regardless of sections
Always obtain and document medical necessity with specific clinical indication, prior imaging results, and reason conventional X-ray is insufficient
Impact: Reduces denial rate from approximately 25-30% to under 10% for this frequently questioned code
Check payer-specific policies as many commercial payers consider 76100 obsolete technology and may deny in favor of CT; obtain prior authorization when required
Impact: Prior authorization compliance prevents 100% denials; approximately 40% of commercial payers have restrictive policies
For facility billing, ensure correct revenue code (0320 for diagnostic radiology) is paired with CPT 76100 on UB-04 claims

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 76100 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 76100 is $85.39 for both facility and non-facility settings. This rate is based on a total RVU of 2.64 (work RVU 0.58, PE RVU 2.01, MP RVU 0.05) multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary based on geographic locality adjustments.

Is CPT 76100 still used or has it been replaced by CT scans?

CPT 76100 is still a valid code but is used much less frequently than in past decades due to the widespread availability of CT scanning. Conventional body section radiography (tomography) remains appropriate for specific situations where CT is contraindicated, unavailable, or where conventional tomography provides adequate diagnostic information at lower cost and radiation exposure, such as certain temporal bone evaluations or assessment of spinal fusion healing.

Can CPT 76100 be billed with other X-ray codes on the same date of service?

Yes, CPT 76100 can be billed with other X-ray codes when performed on different anatomical areas or when medically necessary for distinct clinical indications. However, you should append modifier 59 to indicate a distinct procedural service and ensure thorough documentation of medical necessity for each separate imaging study to avoid bundling denials.

What documentation is required to support medical necessity for CPT 76100?

Documentation must include a written physician order with specific clinical indication, explanation of why conventional tomography is appropriate versus standard X-rays or CT imaging, the specific anatomical area examined, comparison to prior studies when available, and a complete interpretation report. Most importantly, document why alternative imaging modalities are insufficient or contraindicated for the clinical question being addressed.

How do I bill CPT 76100 when only reading the films versus performing the entire study?

Use modifier 26 when billing only the professional component (interpretation and report) if you did not provide the equipment or technical staff. The technical component would be billed separately by the facility using modifier TC. If you provide both the technical and professional services (global service), bill 76100 without modifiers. The professional component represents approximately 22% of the total payment while the technical component represents approximately 78%.

Do I need prior authorization for CPT 76100?

Prior authorization requirements vary by payer. Many commercial insurance plans require prior authorization for CPT 76100 due to the availability of alternative imaging modalities and medical necessity concerns. Medicare typically does not require prior authorization but may conduct retrospective medical necessity reviews. Always verify authorization requirements with the specific payer before performing the service to avoid denials.

What are common reasons for CPT 76100 claim denials?

The most common denial reasons include lack of documented medical necessity, payer policies deeming conventional tomography obsolete compared to CT, missing prior authorization, bundling with other imaging services performed on the same date, and insufficient documentation explaining why alternative imaging cannot be used. The code has a higher-than-average denial rate due to payer scrutiny of its continued clinical utility.