CPT 77081Radiology

Dxa bone density appendiculr

CPT 77081 is the billing code for a bone density scan of the arms or legs using DXA technology, which measures bone strength to assess fracture risk in peripheral skeletal sites.

Showing rates for

National Average

Base Medicare rate

$31.05

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

0.2

PE RVU (NF)

0.74

MP RVU

0.02

Total RVU

0.96

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

NCCI bundling edits

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Billing tips

Verify Medicare coverage criteria before performing peripheral DXA, as Medicare typically covers central DXA (77080) preferentially and may deny 77081 when central sites are accessible
Impact: Prevents $31.05 denial and patient satisfaction issues; can reduce denial rate by 40-60%
Document specific medical necessity for choosing peripheral over central DXA measurement (e.g., patient cannot lie flat, weight exceeds table limit, bilateral hip prostheses)
Impact: Increases clean claim rate by 35% and reduces medical necessity denials
Do not bill 77081 more frequently than every 23 months for the same beneficiary unless exceptional circumstances are documented
Impact: Medicare frequency limitation applies; premature repeat scans will deny, costing $31.05 per rejected claim
Bill global code 77081 when practice owns equipment and provides interpretation; split with 26/TC modifiers only when components are genuinely separate
Impact: Incorrect modifier use can delay payment 15-30 days or trigger claim rejection
Ensure interpreter has documented credentials in bone densitometry; payer audits increasingly verify qualifications
Impact: Credential deficiencies can result in recoupment of all 77081 payments during audit period, potentially thousands of dollars
Link appropriate ICD-10 codes for osteoporosis screening (Z13.820), osteoporosis (M81.0), or specific fracture history to establish medical necessity
Impact: Proper diagnosis coding increases first-pass approval rate by 25-30%

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 77081 in 2025?

The 2025 Medicare national average payment for CPT 77081 is $31.05 for both facility and non-facility settings. This rate is based on 0.96 total RVUs multiplied by the 2025 conversion factor of 32.3465.

How often can CPT 77081 be billed for the same patient?

Medicare typically covers bone density testing once every 23 months for standard monitoring. More frequent testing requires exceptional documentation such as initiation of osteoporosis treatment, monitoring glucocorticoid therapy, or significant change in clinical status.

What is the difference between CPT 77081 and 77080?

CPT 77080 is for central DXA scanning of the spine and/or hip, while 77081 is for peripheral/appendicular sites like forearm, wrist, or heel. Medicare and most payers prefer central DXA (77080) as the gold standard; 77081 requires justification for why central sites cannot be measured.

Can CPT 77081 be billed with modifier 26 or TC?

Yes, 77081 can be split into professional component (modifier 26 for interpretation) and technical component (modifier TC for equipment and technologist). This is appropriate when different entities provide interpretation versus perform the scan, but both components cannot be billed by the same provider on the same claim.

What diagnosis codes support medical necessity for CPT 77081?

Common supporting ICD-10 codes include Z13.820 (encounter for screening for osteoporosis), M81.0 (age-related osteoporosis without current pathological fracture), M80.0 series (osteoporosis with fracture), and Z87.310 (personal history of osteoporotic fracture). Long-term steroid use (Z79.52) also supports medical necessity.

Do commercial payers reimburse CPT 77081 differently than Medicare?

Commercial payer reimbursement for 77081 varies significantly, typically ranging from 110-200% of Medicare rates ($34-$62). Many commercial payers also have different medical necessity criteria and may require prior authorization for bone density testing.

What are the work RVUs and practice expense RVUs for CPT 77081?

For 2025, CPT 77081 has 0.2 work RVUs, 0.74 practice expense RVUs (both facility and non-facility), and 0.02 malpractice RVUs, totaling 0.96 RVUs. These values are from the CMS Physician Fee Schedule RVU25A released December 23, 2024.