Surgical · Other

Reconstruction of the midface (Le Fort III level) with advancement using an internal distraction device — a high-complexity craniofacial procedure performed for severe midface hypoplasia or retrusion.

Verified May 8, 2026 · 6 sources ↓

Medicare: $2,392.84
Total RVUs: 71.64
Global, days: 90
Region: Other

Drawn from CMSAAOS

Documentation requirements

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

Source · Editorial brief grounded in 6 cited references ↓

Diagnosis driving reconstruction — specify the condition (e.g., syndromic craniosynostosis, midface hypoplasia, post-traumatic deformity) with supporting imaging
Operative note must name the osteotomy level (Le Fort III) explicitly — do not write 'standard midface osteotomy'
Documentation of internal distractor placement: device type, brand, placement location, and activation vector
Distraction protocol documented in chart: planned activation schedule, total planned advancement in millimeters
Pre-operative imaging (CT cephalometry or equivalent) confirming midface retrusion and surgical planning
Informed consent documenting discussion of staged nature of the procedure including anticipated device removal

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 57 Decision for surgery 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 6 cited references ↓

CPT 21160 describes surgical reconstruction of the midface at the Le Fort III osteotomy level, with advancement accomplished via an implanted internal distraction device. This is one of the most technically demanding procedures in craniofacial surgery: the surgeon performs complete Le Fort III osteotomies, mobilizes the midface, and places an internal distractor that is subsequently activated over weeks to gradually advance the midface to the desired position. It is distinct from acute advancement procedures because distraction osteogenesis requires staged activation, and the internal device placement is integral to the code.

The 90-day global period means all distractor activation visits, wound checks, and routine post-operative care are bundled. If a separate procedure is required to remove the distractor after consolidation — a common staged event — bill that with modifier 58 (staged/related procedure by the same physician), which resets the global clock. Any E/M visit at which the decision to proceed with surgery was made within 24 hours of the procedure date requires modifier 57 on the E/M code.

This code sits in the craniofacial reconstruction family alongside related midface and orbital procedures. When additional significant work is performed beyond what the code typically entails — such as simultaneous fronto-orbital advancement or unplanned complex reconstruction — modifier 22 with detailed operative note documentation is appropriate. Confirm NCCI PTP edits for any concomitant procedures reported on the same date; bundling disputes should reference CMS NCCI tables directly.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	46.01
Practice expense RVU	18.92
Malpractice RVU	6.71
Total RVU	71.64
Medicare national rate	$2,392.84
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	$2,392.84
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 21160 get rejected.

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

Operative note fails to specify Le Fort III level — generic 'midface reconstruction' language triggers downcoding or denial
Internal distractor device not documented as placed intraoperatively — payer cannot confirm code selection over simpler advancement codes
Device removal billed without modifier 58, causing denial as a duplicate or bundled service within the 90-day global
Missing pre-operative imaging in the medical record supporting medical necessity for distraction at Le Fort III level
E/M on day of or day before surgery denied because modifier 57 was omitted — required for major surgery global periods when decision for surgery is made at that visit

Frequently asked questions

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

01Does the 90-day global include distractor activation visits?

Yes. All post-operative activation visits, wound checks, and routine follow-up through day 90 are bundled into the global. Do not bill separately for these visits unless a significant, separately identifiable problem unrelated to the surgery arises — and then append modifier 24 to the E/M code.

02How do I bill the internal distractor removal?

Distractor removal after consolidation is a planned staged procedure. Bill it with modifier 58 (staged or related procedure by the same physician during the post-operative period). Modifier 58 resets the global period clock. Using modifier 79 (unrelated procedure) would be incorrect here because removal is directly related to the original surgery.

03When is modifier 22 appropriate for 21160?

Use modifier 22 when the operative work substantially exceeds the typical Le Fort III distraction advancement — for example, when simultaneous fronto-orbital advancement, extensive scar management from prior surgery, or unplanned complex reconstruction adds significant time and complexity. The operative note must explicitly describe what made the case atypical. Routine difficulty does not support modifier 22.

04Can 21160 be billed with other craniofacial codes on the same date?

Potentially, with modifier 51 on the secondary procedure, but check NCCI PTP edits for each code pair before billing. Some concurrent craniofacial procedures are bundled. If a co-surgeon is involved in a truly distinct portion of the case, modifier 62 applies to both surgeons' claims.

05What is the difference between 21160 and other Le Fort III codes?

21160 specifically covers Le Fort III advancement using an internal distraction device. Other Le Fort III codes describe acute (non-distraction) osteotomy and advancement. The distraction mechanism — internal device placement plus staged activation — is the distinguishing feature of 21160 and must be documented in the operative note.

06Is modifier 57 needed if the surgery decision was made at a pre-op visit?

Yes. If the decision for this major surgery (90-day global) was made at an E/M visit on the day of or the day before surgery, append modifier 57 to the E/M code. Without it, payers will deny the E/M as bundled into the pre-operative global period.

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 level by name (Le Fort III), documents internal distractor type and placement site from dictation, and records the planned activation protocol. This prevents the most common audit trigger for 21160 — operative notes that describe midface work without explicitly naming the Le Fort III level or confirming internal device placement, both of which payers use to validate the code against simpler advancement alternatives.

See how Mira captures CPT 21160 documentation