Us bone stimulation

CPT code 20979 covers ultrasound bone stimulation therapy, a non-invasive treatment that uses low-intensity sound waves to help heal broken bones or promote bone growth. This is typically used when fractures are slow to heal or at high risk of not healing properly.

Showing rates for

National Average

Base Medicare rate

$54.34

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

0.62

PE RVU (NF)

0.99

MP RVU

0.07

Total RVU

1.68

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

NCCI bundling edits

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Billing tips

Verify coverage prior to initiating treatment as many Medicare Administrative Contractors (MACs) have Local Coverage Determinations (LCDs) with specific criteria for bone stimulation reimbursement
Impact: Can prevent 100% denial of claims; MACs may only cover specific fracture types or require failed conservative treatment for 90+ days
Bill 20979 per treatment session, not per device rental period; this is a per-session code for the professional service of administering/supervising the therapy
Impact: Incorrect billing as a monthly rental can result in significant underpayment or denials; proper per-session billing maximizes the $54.34 rate per treatment
Document medical necessity with radiographic evidence of delayed union or nonunion; include X-ray dates and findings showing lack of healing progression
Impact: Missing radiographic documentation is the leading cause of denials; comprehensive documentation can reduce denial rate from 40% to under 10%
Issue an ABN (modifier GA) when treating conditions with questionable Medicare coverage, such as stress fractures or fresh fractures without high-risk features
Impact: Protects collection rights; allows charging patient the $54.34+ per session if Medicare denies, preventing complete revenue loss
Be aware of the facility vs. non-facility rate differential ($54.34 vs. $30.08); bill appropriately based on place of service code
Impact: Incorrect POS coding can result in $24.26 underpayment per session; over a 12-week treatment course (84 sessions), this equals $2,037.84 in lost revenue
Do not bill 20979 on the same day as other physical medicine modalities (97010-97039) without clear documentation of separate treatments for different conditions

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 20979 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 20979 is $54.34 for non-facility settings and $30.08 for facility settings. These rates are based on 1.68 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality and MAC-specific policies.

How many times can you bill CPT 20979 for a single fracture?

CPT 20979 is billed per treatment session, and typical ultrasound bone stimulation protocols involve daily 20-minute treatments for 12-20 weeks (84-140 sessions). However, payers often have session limits ranging from 60-150 treatments per fracture depending on the LCD or coverage policy. Always verify specific frequency limitations with the patient's payer before initiating treatment.

Does Medicare cover ultrasound bone stimulation (CPT 20979)?

Medicare coverage for 20979 varies by MAC and depends on meeting specific medical necessity criteria outlined in Local Coverage Determinations. Generally, Medicare may cover bone stimulation for nonunions after failed conservative treatment or certain high-risk fresh fractures, but often excludes prophylactic use, stress fractures, or spinal fusion applications. Verify your MAC's LCD before treatment initiation.

What diagnosis codes support medical necessity for CPT 20979?

Appropriate ICD-10 codes include nonunion fracture codes (M84.4xx series with 7th character K), delayed healing fractures (7th character G), and specific fresh fracture codes for high-risk locations when documented criteria are met. The specific fracture location and healing status must be accurately coded. Payers typically deny claims with acute fracture codes without documented high-risk features or prolonged healing criteria.

Can CPT 20979 be billed with physical therapy codes?

Billing 20979 with physical therapy codes (97000 series) on the same day requires careful documentation showing separate, distinct services for different conditions or body areas. If bone stimulation and PT both address the same fracture, NCCI edits or payer bundling policies may deny one service. When both are medically necessary, use modifier 59 or XS with clear documentation of separate treatments.

What is the difference between CPT 20979 and E0760 for bone stimulation?

CPT 20979 is a physician/professional service code for administering or supervising ultrasound bone stimulation per session, reimbursed at $54.34 non-facility. E0760 is a HCPCS durable medical equipment code for the rental/purchase of the osteogenic stimulator device itself. Billing depends on the service model: in-office treatments use 20979; home device rentals use E0760. They are not billed together for the same treatment course.

What documentation prevents denials for CPT 20979?

Essential documentation includes: initial and follow-up imaging with radiologist reports showing delayed/nonunion, clinical notes documenting conservative treatment failure for appropriate duration (6-12+ weeks), physician orders for bone stimulation with specific medical necessity justification, per-session treatment records with duration and device settings, and periodic progress notes with radiographic reassessment. ABN forms are recommended when coverage is questionable.