Surgical reconstruction of the mandibular body and/or rami using a sagittal split osteotomy technique, with internal fixation applied to stabilize the repositioned jaw segments.

Verified May 8, 2026 · 6 sources ↓

Medicare: $1,296.62
Total RVUs: 38.82
Global, days: 90
Region: Other

Drawn from CMSAAPCFindacodeMdclarity

Documentation requirements

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

Source · Editorial brief grounded in 6 cited references ↓

Operative note must identify the specific osteotomy technique by name (e.g., sagittal split, bilateral sagittal split osteotomy)
Document the fixation method, hardware type, and placement site — plates, screws, or wire fixation must be specified
Record the degree and direction of mandibular segment repositioning in millimeters
Preoperative imaging (CT or panoramic radiograph) confirming skeletal deformity and surgical planning
If modifier 62 is used, each surgeon's operative note must clearly delineate their distinct intraoperative responsibilities
If bilateral procedures are billed with LT/RT, confirm both rami were independently operated on and document each side separately in the note

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 52 Reduced services 58 Staged or related 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 LT Left side RT Right side

What this code covers

Source · Editorial summary grounded in 6 cited references ↓

CPT 21196 describes sagittal split osteotomy reconstruction of the mandibular rami and/or body with fixation. The surgeon divides the mandible along its sagittal plane, repositions the distal segment to correct skeletal deformity — typically retrognathia, prognathia, or asymmetry — and secures the segments with rigid internal fixation hardware such as plates and screws. The procedure addresses structural deformities arising from congenital conditions, developmental anomalies, or post-traumatic sequelae.

The 90-day global period covers all routine post-op management through day 90. Any encounter unrelated to mandibular reconstruction recovery during that window requires modifier 24. Staged follow-on jaw procedures planned at the time of the original surgery bill with modifier 58. Bilateral sagittal split osteotomies — the most common clinical scenario — are billed as two line items with LT and RT modifiers rather than modifier 50, since left and right mandibular rami are anatomically distinct operative sites.

This is a high-complexity craniofacial procedure frequently performed jointly by oral and maxillofacial surgery and plastic surgery. When two surgeons of different specialties each perform distinct portions of the reconstruction, both bill 21196 with modifier 62. Operative notes must document the osteotomy approach, fixation method, hardware specifications, and degree of skeletal movement — vague notes citing only 'jaw reconstruction' are a primary audit target.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	20.31
Practice expense RVU	15.56
Malpractice RVU	2.95
Total RVU	38.82
Medicare national rate	$1,296.62
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	$1,296.62
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 21196 get rejected.

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

Missing or insufficient fixation documentation — payers deny when the operative note doesn't confirm internal fixation was applied
Bilateral billing denied when submitted with modifier 50 instead of separate LT and RT line items
Modifier 62 co-surgeon claims denied without distinct documentation of each surgeon's separate operative role
Staged reconstruction claims denied during the 90-day global without modifier 58 linking them to the original procedure
Medical necessity denial when preoperative imaging or clinical records don't establish the severity of skeletal deformity requiring surgical correction

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01Should bilateral sagittal split osteotomies be billed with modifier 50 or separate LT/RT line items?

Bill as two separate line items — 21196-LT and 21196-RT. Modifier 50 is designed for truly symmetric bilateral procedures on paired structures; left and right mandibular rami are treated as distinct operative sites with separate fixation, and most payers expect laterality modifiers here rather than modifier 50.

02How do two co-surgeons bill when both operate on the mandible during the same session?

Both surgeons bill 21196 with modifier 62. Each must have a separate operative note detailing their distinct intraoperative contributions. Without that documentation, one or both claims will be denied. The total allowed amount is split between the two surgeons per CMS co-surgery rules.

03Can a pre-op E&M be billed separately the day before surgery?

No. The day-before visit is included in the 90-day global period for major surgical procedures. The only exception is if the E&M that same day represents the decision for surgery — bill that with modifier 57 only if it was a separately identifiable visit that resulted in the operative decision.

04What modifier is correct if a planned second-stage jaw procedure is performed during the 90-day global?

Modifier 58 — staged or related procedure by the same physician during the postoperative period. It must have been planned at the time of the original surgery. An unplanned return to the OR for a related complication uses modifier 78 instead.

05Is modifier 22 ever justified for 21196?

Yes, but it requires compelling documentation. Qualifying scenarios include severe post-traumatic scarring, prior failed osteotomy requiring takedown, or unusual anatomic complexity requiring extended operative time. The operative note must quantify why work exceeded the typical case — document additional time, complexity, and any atypical anatomy explicitly.

06Is CPT 21196 ever billed with 21110 on the same claim?

This combination does occur in complex trauma cases where intermaxillary fixation (21110) is placed alongside the sagittal split reconstruction. Modifier 59 or XS may be needed to establish the services as distinct. Confirm NCCI edits before submitting, and ensure the operative note documents each procedure as separately necessary and performed.

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 technique by name, fixation hardware type and placement, degree of mandibular repositioning, and each surgeon's distinct operative role from dictation. This prevents the most common audit flag — operative notes that describe jaw reconstruction generically without confirming that fixation was placed or specifying which ramus was addressed.

See how Mira captures CPT 21196 documentation