CPT 21255Surgery

Reconstruct lower jaw bone

CPT code 21255 covers surgical reconstruction of the lower jaw bone (mandible), typically performed after trauma, tumor removal, or severe infection that has damaged or destroyed part of the jawbone.

Showing rates for

National Average

Base Medicare rate

$1,296.45

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

18.46

PE RVU (NF)

19.73

MP RVU

1.89

Total RVU

40.08

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

NCCI bundling edits

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Billing tips

Document bone graft harvest site separately and bill appropriate harvest code (20900-20902) in addition to 21255, as graft harvest is not included in the reconstruction code
Impact: Can add $200-600 in additional reimbursement depending on harvest site and complexity
For microvascular free flap reconstruction, bill the appropriate free flap code (15756-15758) in addition to 21255, as the soft tissue transfer is separately reportable from the bony reconstruction
Impact: Free flap codes add $1500-3000+ to total procedure reimbursement and accurately reflect the additional surgical complexity
Use modifier 22 with comprehensive documentation when dealing with revision cases, previously irradiated tissue, or extensive defects requiring multiple graft sites; include operative time, specific additional work performed, and comparison to typical case
Impact: Properly documented modifier 22 claims can increase reimbursement by $250-650 for this code
Ensure operative report clearly documents the extent of mandibular defect, specific reconstruction technique used, graft material type and source, and fixation method to support medical necessity and prevent downcoding
Impact: Prevents downcoding to simpler bone graft codes (21210, 21215) which reimburse $400-800 less
Bill facility charges separately from professional fees; this code has identical facility and non-facility rates but hospital can bill separately for operating room, implants, and hospital stay
Impact: Hospital facility charges for this procedure typically range $15,000-50,000 depending on case complexity and length of stay
Coordinate billing with anesthesia team to ensure proper documentation of surgical time and complexity; these cases often exceed 4 hours and require special anesthesia considerations

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 21255 in 2025?

The 2025 Medicare national average reimbursement for CPT 21255 is $1,296.45 for both facility and non-facility settings. The code carries 40.08 total RVUs (18.46 work RVUs, 19.73 practice expense RVUs, and 1.89 malpractice RVUs) multiplied by the 2025 conversion factor of 32.3465.

Can I bill bone graft harvest separately with CPT 21255?

Yes, bone graft harvest is separately reportable when performed with 21255. Use codes 20900-20902 for autogenous graft harvest depending on the donor site. The harvest procedure is not included in the mandibular reconstruction code and should be billed as an additional line item with appropriate documentation of the harvest site and technique.

What documentation is required to avoid denials for CPT 21255?

Required documentation includes detailed operative report describing the mandibular defect size and location, reconstruction technique and materials used, graft source if applicable, fixation method, pre-operative imaging showing bone loss, medical necessity justification (trauma, tumor, infection), and functional deficits addressed. Pre-authorization is often required with supporting clinical notes and imaging.

How do I bill CPT 21255 with a free flap reconstruction?

When mandibular reconstruction includes microvascular free flap, bill both 21255 for the bony reconstruction and the appropriate free flap code (15756-15758) for the soft tissue component. These are distinct procedures: 21255 covers the skeletal reconstruction while free flap codes cover the vascular anastomosis and soft tissue transfer. Modifier 51 may apply; verify payer-specific guidelines.

What modifiers are most commonly used with CPT 21255?

Most common modifiers include: modifier 22 for increased procedural complexity in revision or extensive cases; modifier 58 for staged reconstruction procedures; modifier 62 for co-surgery when microvascular surgeon assists; and modifier 78 for return to OR for related complications during global period. Each requires specific documentation to support the modifier use.

Is CPT 21255 subject to the global surgical package?

Yes, CPT 21255 has a 90-day global period. This includes pre-operative evaluation on the day before or day of surgery, the surgical procedure itself, and all routine follow-up care for 90 days post-operatively. Complications requiring return to OR use modifier 78 or 79 depending on whether they are related to the original procedure.

What are common reasons for CPT 21255 claim denials?

Common denials include: medical necessity not established, procedure deemed cosmetic rather than reconstructive, insufficient documentation of defect extent, bundling issues with bone harvest or other procedures, lack of pre-authorization, and inadequate support for modifier 22 increased complexity claims. Always obtain pre-authorization and submit comprehensive documentation with imaging and detailed operative reports.