CPT 21179Surgery

Reconstruct entire forehead

CPT code 21179 covers surgical reconstruction of the entire forehead, typically performed after trauma, tumor removal, or congenital deformities requiring extensive bone and soft tissue repair.

Showing rates for

National Average

Base Medicare rate

$1,482.44

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

22.65

PE RVU (NF)

19.03

MP RVU

4.15

Total RVU

45.83

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

NCCI bundling edits

Loading bundling edits…

Billing tips

Document all components of the reconstruction including bone work, soft tissue manipulation, grafting materials, and closure techniques to justify the comprehensive nature of 21179 versus lesser forehead procedures
Impact: Prevents downcoding to simpler procedures like 21175 which pays significantly less; protects full $1482.44 reimbursement
Capture bone graft harvest separately (e.g., 20900-20902) when autogenous bone is obtained from a separate incision site, as this is not bundled into 21179
Impact: Additional $200-400 in reimbursement depending on graft site and complexity; commonly overlooked revenue
For complex cases requiring modifier 22, document additional time spent (starting and ending times), specific anatomical challenges encountered, and comparison to typical 21179 case complexity
Impact: Well-documented modifier 22 claims can increase reimbursement by $300-750; submit operative report with cover letter highlighting increased complexity
When performed with cranial vault procedures (21181-21184), verify bundling edits in NCCI; these may be separately billable if distinct anatomical areas are addressed
Impact: Potential for additional $2000-4000 in reimbursement if properly documented as separate anatomical regions with distinct surgical approaches
Bill place of service correctly (facility vs non-facility); 21179 has identical rates ($1482.44) for both settings but documentation requirements may differ
Impact: While rates are equal, incorrect POS coding can trigger audits; ensure consistency between claim form and medical record location
For revision forehead reconstruction, clearly document whether this is within or beyond the 90-day global period and apply modifiers 78 or 79 appropriately

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Applicable modifiers

Mod 22

When to use: When the forehead reconstruction requires significantly greater complexity than typical cases due to extensive trauma, prior failed reconstructions, or unusual anatomical challenges

Reimbursement impact: Can increase reimbursement by 20-50% with proper documentation; requires detailed operative report explaining additional time, complexity, and intensity beyond typical 21179

Mod 62

When to use: When two surgeons of different specialties work together as co-surgeons (e.g., plastic surgeon and neurosurgeon) each performing distinct portions of the forehead reconstruction

Reimbursement impact: Each surgeon receives 62.5% of the allowable fee ($926.53 per surgeon); requires both surgeons to document their distinct roles in separate operative notes

Mod 78

When to use: When returning to the operating room for a related procedure during the global period of the initial forehead reconstruction (e.g., revision within 90 days)

Reimbursement impact: Reduces reimbursement to intraoperative portion only; critical to document that revision was unplanned but related to original reconstruction

Mod 79

When to use: When performing an unrelated procedure during the 90-day global period following the initial forehead reconstruction

Reimbursement impact: Allows full reimbursement for the unrelated procedure; documentation must clearly demonstrate the service is distinct and unrelated to initial reconstruction

Mod LT/RT

When to use: Generally not applicable as 21179 describes reconstruction of the entire forehead; however, may be required by some payers for documentation specificity

Reimbursement impact: No direct reimbursement impact but may be required for claims processing; verify individual payer requirements

Mod 54

When to use: When billing only the surgical care component while another physician provides postoperative management

Reimbursement impact: Reduces reimbursement to approximately 80% of total fee ($1185.95); requires clear transfer of care documentation

Frequently asked questions

What is the Medicare reimbursement rate for CPT 21179 in 2025?

The 2025 Medicare national average reimbursement for CPT 21179 is $1482.44 for both facility and non-facility settings. This is based on a total RVU of 45.83 and the 2025 conversion factor of 32.3465. Actual reimbursement may vary based on geographic locality adjustments.

What is the difference between CPT 21179 and 21175?

CPT 21179 describes reconstruction of the entire forehead including comprehensive bone and soft tissue work, while CPT 21175 covers reconstruction of the entire or majority of the forehead and/or supraorbital rims with autograft. Code selection depends on the specific anatomical structures involved and the extent of reconstruction performed. Review operative details carefully to select the most accurate code.

Can CPT 21179 be billed with bone graft harvest codes?

Yes, bone graft harvest codes (20900-20902) can typically be billed separately when autogenous bone is obtained from a separate incision site distinct from the forehead reconstruction. Document the separate harvest site clearly in the operative report and verify NCCI edits are not in effect for the specific date of service.

What diagnosis codes support medical necessity for CPT 21179?

Common supporting diagnoses include traumatic forehead fractures (S02.0XXA), malignant/benign neoplasm excision sequelae (C44.3, D23.3), congenital craniofacial deformities (Q75.x), and post-surgical defects (Z90.09). The diagnosis must demonstrate that complete forehead reconstruction is medically necessary, not purely cosmetic.

Is CPT 21179 covered by Medicare and private insurance?

Medicare covers CPT 21179 when performed for reconstructive purposes following trauma, disease, or congenital deformity. Private insurers typically cover the procedure with similar medical necessity criteria, though pre-authorization is commonly required. Cosmetic forehead reconstruction is generally excluded from coverage by all payers.

What are the Work RVUs for CPT code 21179?

CPT 21179 has 22.65 work RVUs for 2025, reflecting the significant physician work involved in complete forehead reconstruction. The total RVU is 45.83, which includes work RVUs (22.65), practice expense RVUs (19.03), and malpractice RVUs (4.15).

How long is the global period for CPT 21179?

CPT 21179 has a 90-day global period, meaning routine pre-operative and post-operative care within 90 days of the procedure is included in the reimbursement. Complications requiring return to the OR should be billed with modifier 78, while unrelated procedures during the global period require modifier 79 for separate reimbursement.