Surgical · Other

Periorbital osteotomies with bone grafting to correct orbital hypertelorism — abnormal widening of the bony eye socket separation.

Verified May 8, 2026 · 4 sources ↓

Medicare: $1,251.87
Total RVUs: 37.48
Global, days: 90
Region: Other

Drawn from CMSAaoAAPCCgsmedicare

Documentation requirements

What must appear in the operative or office note to support the claim.

Source · Editorial brief grounded in 4 cited references ↓

Preoperative CT imaging with quantified inter-orbital distance measurements documenting hypertelorism
Diagnosis documented by name (orbital hypertelorism) with congenital or acquired etiology specified
Operative note naming the specific osteotomy approach, orbital walls addressed, and graft source (autograft vs. allograft)
Documentation that the condition is reconstructive, not cosmetic — functional or developmental impairment stated explicitly
Prior authorization records with payer-approved ICD-10 code(s) matching the claim
Bone graft harvest documented separately if a second site was used, to support any additional graft codes billed

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 58 Staged or related 62 Co-surgeons 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 4 cited references ↓

CPT 21260 covers surgical correction of orbital hypertelorism via periorbital osteotomies: the surgeon makes bone cuts around one or both orbits, repositions the orbital walls to reduce the inter-orbital distance, and fills osseous defects with bone grafts. This is a craniofacial reconstruction procedure, not a cosmetic one, and medical necessity hinges on a documented congenital or acquired condition causing abnormal inter-orbital distance.

The 90-day global period covers the operative session plus all routine postoperative management through day 90. Any unrelated procedure performed during that window requires modifier 79. A staged or planned return to the OR for a related reason — such as graft revision — uses modifier 58. Unplanned return for a related complication uses modifier 78.

Payer scrutiny on this code is high because it sits in the cosmetic-versus-reconstructive gray zone. Prior authorization is standard; attach the imaging (CT with measurements), the diagnosis (Q13.0 or applicable ICD-10), and operative planning notes before the case. Palmetto's billing and coding article (A56658) lists specific covered ICD-10 diagnoses — if yours isn't on that list, expect an automatic medical necessity denial.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	17.45
Practice expense RVU	16.8
Malpractice RVU	3.23
Total RVU	37.48
Medicare national rate	$1,251.87
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	$1,251.87
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 21260 get rejected.

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

Cosmetic exclusion applied when operative note lacks explicit reconstructive/functional necessity language
ICD-10 diagnosis not on the payer's covered-diagnosis list for this code (Palmetto LCD A56658 procedure-to-diagnosis edit)
Missing or expired prior authorization — most commercial and Medicare Advantage plans require it for craniofacial reconstruction
Bone graft code billed separately but bundled into the primary procedure without a supported modifier
Global period conflict — postoperative E/M billed without modifier 24 during the 90-day window

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 4 cited references ↓

01Does CPT 21260 require prior authorization?

Yes — virtually every payer requires it. Submit CT measurements, the covered ICD-10 diagnosis, and operative planning documentation before the case. Retroactive authorization requests on craniofacial codes rarely succeed.

02Which ICD-10 codes support medical necessity for 21260?

Q13.0 (congenital malformation of iris) is one anchor, but the primary driver is the hypertelorism diagnosis. Payers using Palmetto LCD A56658 apply procedure-to-diagnosis edits — verify your exact ICD-10 against that covered list before billing.

03Can 21260 and 21261 be billed together?

21261 covers a more extensive combined intra- and extracranial approach. Bill the code that matches the actual surgical approach documented — do not stack 21260 and 21261 for the same orbit on the same date.

04How do you handle a bone graft harvested from a separate site?

If the surgeon harvests autograft from a separate anatomical site (e.g., iliac crest), the graft harvest may be separately reportable. Confirm NCCI bundling status for the specific graft code before adding it to the claim.

05What modifier applies if the surgeon returns to the OR during the 90-day global for a related complication?

Use modifier 78 for an unplanned return to the OR for a complication related to the original procedure. Modifier 79 is for an unrelated procedure. Inverting these is an audit flag.

06Is this code billable at an ASC?

CMS assigns an ASC payment rate to 21260 (see the Site of Service comparison table). However, the complexity of craniofacial osteotomy with bone grafting means most cases are performed in a hospital OR — verify your ASC's equipment and staffing credentials support this level of craniofacial work before scheduling.

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 osteotomy approach (coronal, subcranial, or combined), orbital walls addressed, inter-orbital distance pre- and post-correction, graft type and harvest site, and the specific diagnosis driving reconstruction. That detail prevents the single most common denial on this code: a payer's cosmetic exclusion edit triggered when the op note doesn't explicitly tie the procedure to a documented congenital or acquired functional impairment.

See how Mira captures CPT 21260 documentation