CPT 78811Radiology

Pet image ltd area

CPT 78811 covers PET (Positron Emission Tomography) imaging of a limited body area, a specialized nuclear medicine scan that helps detect cancer, heart disease, and brain disorders by showing how tissues and organs are functioning at a cellular level.

Showing rates for

National Average

Base Medicare rate

$68.25

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

1.54

PE RVU (NF)

0.51

MP RVU

0.06

Total RVU

2.11

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

NCCI bundling edits

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Billing tips

Clearly document the specific limited anatomical area imaged and why full-body PET (78813, 78814, 78815, 78816) was not clinically indicated
Impact: Prevents downcoding to unlisted procedure codes or denials for lack of medical necessity; protects full $68.25 reimbursement
Verify that the imaging report specifies the exact anatomical boundaries of the limited area studied and includes number of images acquired
Impact: Critical for audit defense; missing anatomical specificity is a top denial reason accounting for 30-40% of PET claim rejections
Bill 78811 globally when performed in a freestanding center; split with modifiers 26/TC only when professional and technical components are truly separate entities
Impact: Incorrect modifier use can reduce reimbursement by 40-60% or trigger claims review for inappropriate unbundling
Append modifier 59 when billing 78811 with other imaging codes on same date only when separate diagnostic studies of truly distinct areas are performed
Impact: Appropriate use captures additional reimbursement; inappropriate use triggers NCCI edits and potential fraud review
Include ICD-10 codes that clearly establish medical necessity for limited-area PET rather than screening or alternative imaging modality
Impact: Payers may deny without diagnosis codes supporting metabolic imaging need; proper coding prevents $68.25 denial and expedites payment
Document the radiopharmaceutical used, dose administered, uptake time, and any attenuation correction methodology in the procedure report
Complete technical documentation reduces audit risk and supports medical necessity; missing elements trigger 15-20% of post-payment audits

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 78811 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 78811 is $68.25 for both facility and non-facility settings, based on a total RVU of 2.11 and conversion factor of 32.3465.

What is the difference between CPT 78811 and 78813 for PET imaging?

CPT 78811 is for PET imaging of a limited anatomical area (such as a single extremity or specific region), while CPT 78813 represents whole-body PET imaging from skull base to mid-thigh. Code selection depends on the extent of anatomical coverage documented in the imaging protocol and clinical indication.

Does CPT 78811 require prior authorization from Medicare or commercial payers?

Prior authorization requirements vary by payer. While Medicare typically does not require prior authorization for 78811, many Medicare Advantage plans and commercial insurers do require pre-approval for PET imaging. Always verify specific payer requirements before scheduling to avoid denials.

Can CPT 78811 be billed with modifier 26 for professional component only?

Yes, modifier 26 can be appended to 78811 when billing only the professional component (physician interpretation). The facility would separately bill the technical component using modifier TC. However, freestanding centers typically bill the code globally without modifiers.

What diagnosis codes support medical necessity for CPT 78811?

Diagnosis codes supporting 78811 include malignant neoplasms (C codes), follow-up after cancer treatment (Z08.xx), personal history of malignancy (Z85.xx), and specific conditions where limited-area metabolic imaging aids diagnosis such as soft tissue masses (D48.1), osteomyelitis (M86.xx), or solitary pulmonary nodules (R91.1). Payer-specific LCD/NCD policies should be consulted.

How many RVUs is CPT code 78811 worth in 2025?

CPT 78811 has a total RVU value of 2.11 in 2025, comprised of 1.54 work RVUs, 0.51 practice expense RVUs (both facility and non-facility), and 0.06 malpractice RVUs according to the CMS Physician Fee Schedule.

What documentation is required to bill CPT 78811 without denials?

Required documentation includes: specific limited anatomical area with exact boundaries, clinical indication establishing medical necessity, radiopharmaceutical type and dose, uptake time, imaging parameters, number of images, physician interpretation report, and correlation with clinical history. Missing any element increases denial risk significantly.