Reconstruction of the entire forehead using bone graft harvested from the patient's own body (autograft), performed to correct severe deformity from trauma, congenital anomaly, or disease.
Verified May 8, 2026 · 5 sources ↓
- Medicare
- $1,495.69
- Total RVUs
- 44.78
- Global, days
- 90
- Region
- Other
Documentation requirements
What must appear in the operative or office note to support the claim.
Source · Editorial brief grounded in 5 cited references ↓
- Operative note must identify the specific indication — trauma, congenital deformity, tumor resection, or disease — that necessitates full forehead reconstruction.
- Document the autograft donor site by anatomical location (e.g., calvarium, iliac crest, rib) and confirm the graft was harvested from the patient's own body.
- Describe the extent of bony defect or deformity reconstructed, including the supraorbital rim and frontal bone involvement.
- If modifier 62 is used for co-surgeon billing, each surgeon's operative note must clearly delineate their distinct, codependent role in the procedure.
- If modifier 22 is appended, include a separate written statement quantifying the increased time, complexity, or unusual anatomic findings that elevated the work beyond the standard procedure.
- Pre-operative imaging (CT preferred) establishing the structural deficit should be present in the record to support medical necessity.
Applicable modifiers
Modifiers commonly billed with this code.
Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual
What this code covers
Source · Editorial summary grounded in 5 cited references ↓
CPT 21180 covers extensive reconstruction of the supraorbital and frontal bony structures using autogenous bone graft — material harvested from a separate donor site on the same patient. The indication is typically a significant structural defect of the forehead resulting from craniofacial trauma, tumor resection, or congenital craniosynostosis. The autograft harvest and the reconstruction are reported together under this single code; separately billing the graft harvest will trigger NCCI bundling edits.
This procedure carries a 90-day global period. All routine postoperative visits, wound checks, and suture removals through day 90 are included in the surgical payment. Any service unrelated to the reconstruction billed within that window requires modifier 24 (E/M) or 79 (unrelated procedure). If a complication requires a return to the OR for a related reason — say, graft site dehiscence or hardware failure — report with modifier 78.
Craniofacial cases like this frequently involve two specialties: a plastic or craniofacial surgeon handling the reconstruction and a neurosurgeon managing the craniotomy or exposure. When both surgeons perform distinct, codependent portions of the same procedure, modifier 62 applies to both claims. If the neurosurgeon's craniotomy is a separately reportable, independent procedure, use modifier 59 rather than 62 to distinguish the services.
RVU & reimbursement
Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.
Source · CMS Physician Fee Schedule, RVU26A · January 2026
| Work RVU | 24.94 |
| Practice expense RVU | 15.21 |
| Malpractice RVU | 4.63 |
| Total RVU | 44.78 |
| Medicare national rate | $1,495.69 |
| Global period | 90 days |
Payment by site of service
Medicare pays different rates by setting. HOPD typically pays substantially more than ASC for the same procedure.
Source · CMS OPPS Addendum B·ASC HCPCS payment rates·2026
| Setting | Medicare rate (national) |
|---|---|
Office (PFS non-facility) Procedure performed in physician's office | $1,495.69 |
HOPD (APC 5165) Hospital outpatient department | $6,048.05 |
ASC (PI J8) Ambulatory surgical center (freestanding) | $3,833.49 |
Common denial reasons
The recurring reasons claims for CPT 21180 get rejected.
Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓
- Medical necessity not established — documentation lacks preoperative imaging or a clearly stated structural diagnosis driving reconstruction.
- Autograft harvest billed separately, triggering NCCI bundling denial; the harvest is included in 21180 and cannot be reported with an additional graft code.
- Co-surgeon claims denied when modifier 62 is used but each surgeon's operative note fails to document their distinct, interdependent contribution.
- Services billed within the 90-day global period without modifier 24, 78, or 79, resulting in automatic bundling into the surgical payment.
- Wrong place-of-service code submitted — procedure performed in a hospital or ASC setting must reflect the facility POS, or the non-facility RVU will be applied incorrectly.
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 5 cited references ↓
01Is the autograft harvest separately billable with CPT 21180?
02When does modifier 62 apply versus modifier 80?
03What global period applies, and what does it cover?
04Can modifier 22 be used if the reconstruction was unusually complex?
05Is CPT 21180 payable in an ASC setting?
06What ICD-10 diagnosis codes support medical necessity for 21180?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
Mira AI Scribe
Mira's AI scribe captures the indication (trauma, congenital deformity, or disease), the extent of forehead and supraorbital involvement, the autograft donor site by name, and each surgeon's distinct operative role when a co-surgeon is present. That detail prevents the two most common denials on this code: missing medical necessity narrative and bundling of a separately billed graft harvest.
See how Mira captures CPT 21180 documentation