Surgical · Other

Reconstruction of the superior-lateral orbital rim and lower forehead, with advancement or repositioning, including autograft harvest when performed.

Verified May 8, 2026 · 5 sources ↓

Medicare: $2,089.23
Total RVUs: 62.55
Global, days: 90
Region: Other

Drawn from CMSMdclarityAAPCGenhealthCgsmedicare

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 name the specific structures reconstructed — superior-lateral orbital rim, lower forehead, or both — not generic 'craniofacial reconstruction'.
Document whether autografts were used and identify the donor site (e.g., calvarium, iliac crest); this supports the included harvest and prevents unbundling questions.
Specify fixation hardware used (plate type, screw size) and the method of bony advancement or repositioning.
Record medical necessity with a linked diagnosis — trauma, congenital deformity, post-oncologic defect, or functional visual compromise — supported by imaging.
If two surgeons billed modifier 62, each surgeon's operative note must describe their distinct operative role and work independently.
Document anesthesia type (general) and total operative time to support complexity claims under modifier 22 if applicable.

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 52 Reduced services 59 Distinct service 62 Co-surgeons 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon AS PA/NP/CNS assistant

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

CPT 21172 covers surgical reconstruction of the superior-lateral orbital rim and lower forehead — including bony advancement, repositioning, or alteration — with or without autogenous bone grafts. When grafts are used, harvesting from a donor site (typically calvarium or iliac crest) is included in the code; don't bill a separate graft harvest code. Fixation hardware (plates, screws) placed during the same session is also bundled.

This is a 90-day global code. All routine post-op visits through day 90 are included in the base payment. Complications requiring an unplanned return to the OR for a related issue get modifier 78; a separate, unrelated OR procedure in the global window gets modifier 79. A pre-op visit the day before surgery is bundled under the global; if the pre-op visit requires significant, separately identifiable E/M work for an unrelated problem, append modifier 24.

These cases frequently involve two-surgeon or surgical team arrangements — craniofacial and neurosurgery working together is common. Modifier 62 applies when both surgeons perform distinct portions of the procedure and each bills their own operative work. Confirm co-surgeon allowance with the payer before billing; some payers restrict modifier 62 on this code.

RVU & reimbursement

Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	27.5
Practice expense RVU	23.42
Malpractice RVU	11.63
Total RVU	62.55
Medicare national rate	$2,089.23
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	$2,089.23
HOPD (APC 5165) Hospital outpatient department	$6,048.05
ASC (PI G2) Ambulatory surgical center (freestanding)	$3,025.62

Common denial reasons

The recurring reasons claims for CPT 21172 get rejected.

Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓

Medical necessity not established — diagnosis code doesn't support bony orbital reconstruction (e.g., soft-tissue-only diagnosis submitted with a skeletal reconstruction code).
Unbundling denial when autograft harvest is billed separately; harvesting is included in 21172 and cannot be reported with an additional graft procurement code.
Modifier 62 denied because payer does not allow co-surgeon billing on this code — verify payer policy before submission.
Global period conflict — post-op visit or related procedure billed without modifier 24, 78, or 79 during the 90-day window.
Missing or inadequate operative documentation — notes that say 'orbital reconstruction performed' without specifying structures, approach, or fixation trigger medical review and denial.

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01Is autograft harvest billed separately with 21172?

No. Autograft harvesting — whether from the calvarium or iliac crest — is included in 21172. Billing a separate harvest code alongside 21172 is an unbundling error.

02Can modifier 62 be used when a neurosurgeon and craniofacial surgeon operate together?

Modifier 62 applies when both surgeons perform distinct, separately documented portions of the procedure. However, some payers restrict co-surgeon billing on this code — check the specific payer's policy and confirm NCCI edits before submitting modifier 62.

03What global period applies, and what's included?

21172 carries a 90-day global period. That covers the operative day, the day-before pre-op visit, and all routine post-op care through day 90. Unrelated E/M services in the window need modifier 24; an unplanned related return to the OR needs modifier 78.

04When is modifier 22 appropriate for 21172?

Use modifier 22 when the operative work is substantially greater than typical — for example, extensive scarring from prior surgery, complex multi-segment reconstruction, or unusually prolonged operative time. The operative note must quantify why the work exceeded typical effort; don't append modifier 22 without documentation.

05Does site of service affect reimbursement for 21172?

Yes. HOPD and ASC payments differ — see the Site of Service comparison table on this page. The procedure is almost always performed in a facility setting given its complexity, so the non-facility RVU rate rarely applies.

06How should post-op complications be billed during the global period?

An unplanned return to the OR for a complication related to the original reconstruction uses modifier 78. If the return is for a completely unrelated procedure, use modifier 79. Routine post-op management — wound checks, suture removal, dressings — is bundled and not separately billable.

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 specific structures reconstructed (superior-lateral orbital rim, lower forehead, or both), donor site for any autograft harvest, fixation hardware details, and each surgeon's distinct operative role when two surgeons are present. That documentation prevents the two most common audit flags on this code: unbundled graft harvest billing and unsupported modifier 62 claims.

See how Mira captures CPT 21172 documentation