CPT 21143Surgery

Lefort i-3/> piece w/o graft

CPT 21143 covers a complex jaw surgery called a LeFort I osteotomy where the surgeon cuts the upper jaw into three or more pieces and repositions them without using bone grafts. This procedure corrects severe bite problems, facial asymmetry, or jaw deformities.

Showing rates for

National Average

Base Medicare rate

$1,370.52

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

21.05

PE RVU (NF)

19.18

MP RVU

2.14

Total RVU

42.37

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Do not bill 21143 with any bone graft codes (20900-20902, 21210) as the descriptor specifically excludes grafting. Use 21145 or 21146 instead if grafts are placed.
Impact: Prevents automatic denials and recoupment. Unbundling 21143 with graft codes can trigger fraud audits and 100% claim rejection.
Document the exact number of segments (3, 4, or more) in the operative report with clear description of each osteotomy cut location and segment repositioning to justify the complexity over 2-piece LeFort I (21141).
Impact: 21143 pays $1370.52 vs $1286.89 for 21141 (2-piece) - a $83.63 difference. Inadequate segmentation documentation commonly results in downcoding.
When combining with mandibular osteotomy (21195-21196), always list 21143 first as it carries higher RVUs (42.37 vs 35.12 for 21196) to maximize primary procedure payment before modifier 51 reduction.
Impact: Proper sequencing preserves full $1370.52 for 21143 with only the secondary procedure reduced 50%, maximizing total reimbursement by approximately $200-300.
Bill separately for image guidance (61782-61783) if intraoperative navigation is used, as it is not bundled with 21143 per NCCI edits.
Impact: Recovers additional $300-500 in legitimate reimbursement when navigation technology is documented. Ensure operative report details navigation system use and clinical necessity.
Pre-authorize with medical necessity documentation including cephalometric analysis, dental models, photographic records, and orthodontic records showing skeletal discrepancy >4mm or significant functional impairment.
Impact: Reduces denial rate from 25-30% to under 5% for initial claims. Appeals without pre-authorization have 60-70% success rate vs 90%+ with proper pre-auth.

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Common denials

Medical necessity denial - payer claims procedure is cosmetic rather than functional/reconstructive

How to appeal: Submit comprehensive appeal package including: cephalometric radiographs with annotated measurements showing skeletal discrepancy, orthodontic records documenting functional impairment (chewing, breathing, speech), photographic documentation, sleep study if OSA present, and detailed letter explaining functional deficits. Cite payer's own medical policy criteria for orthognathic surgery coverage. Success rate improves to 75-80% with complete functional documentation.

Bundling denial - payer bundles 21143 with septoplasty (30520), turbinectomy (30130-30140), or genioplasty (21121-21123) performed at same session

How to appeal: Reference NCCI edits showing these are separately reportable with appropriate modifier 59/XU. Submit operative report highlighting distinct anatomic sites and separate incisions. For septoplasty, emphasize functional airway obstruction separate from orthognathic correction. Most payers will reimburse at 50% for secondary procedures upon appeal.

Downcoding from 21143 to 21141 (2-piece LeFort I) due to insufficient documentation of three or more segments

How to appeal: Request reconsideration with highlighted operative report clearly stating '3-piece LeFort I' or '4-segment maxillary osteotomy' with specific description of each osteotomy location (e.g., 'midline split plus bilateral canine osteotomies creating three independent segments'). Include intraoperative photos if available. Provide diagram showing cut locations. Recovery of $83.63 difference plus any interest.

Lack of prior authorization or insufficient pre-treatment documentation of failed conservative therapy

How to appeal: Submit retrospective authorization request with complete records showing: minimum 12-18 months orthodontic preparation, documentation that orthodontics alone cannot correct skeletal discrepancy, interdisciplinary treatment plan signed by orthodontist and surgeon, and records of patient's functional complaints. Include peer-reviewed literature supporting surgical intervention for patient's specific skeletal pattern. Success rate 50-60% for retro-authorization appeals.

Frequently asked questions

What is the 2025 Medicare reimbursement rate for CPT code 21143?

The 2025 Medicare national average reimbursement rate for CPT 21143 is $1370.52 for both facility and non-facility settings. This rate is based on 42.37 total RVUs (21.05 work RVU + 19.18 PE RVU + 2.14 MP RVU) multiplied by the 2025 conversion factor of $32.3465. Actual payment may vary by geographic location based on local GPCI adjustments.

What is the difference between CPT 21143 and 21145?

CPT 21143 is for LeFort I osteotomy in three or more pieces WITHOUT bone graft, while 21145 is for LeFort I in three or more pieces WITH bone graft. If any autograft or allograft is used during the procedure, you must use 21145 instead of 21143. The presence or absence of grafting material is the sole distinguishing factor between these codes.

Can I bill CPT 21143 with a mandibular osteotomy code?

Yes, CPT 21143 can be billed with mandibular osteotomy codes (21195, 21196) when both procedures are performed during the same operative session for bimaxillary orthognathic surgery. List 21143 first as the primary procedure due to higher RVUs, and append modifier 51 to the secondary code. The secondary procedure will typically be reimbursed at 50% of the allowed amount.

How many RVUs is CPT code 21143 worth in 2025?

CPT 21143 has a total of 42.37 RVUs in 2025, consisting of 21.05 work RVUs, 19.18 practice expense RVUs (both facility and non-facility), and 2.14 malpractice RVUs. This makes it one of the higher-valued orthognathic surgery codes, reflecting the complexity of performing a multi-segment maxillary osteotomy.

Does CPT 21143 require prior authorization from insurance?

Most commercial payers and Medicare Advantage plans require prior authorization for CPT 21143 due to its high cost and potential for medical necessity disputes. Authorization typically requires cephalometric analysis, orthodontic records, photographic documentation, and evidence of functional impairment. Medicare traditional does not require pre-authorization but may conduct post-payment review for medical necessity.

What diagnosis codes support medical necessity for CPT 21143?

Common supporting ICD-10 codes include M26.12 (maxillary hypoplasia), M26.19 (other specified anomalies of jaw size), M26.4 (malocclusion unspecified), Q35-Q37 series (cleft palate/lip), M26.54 (insufficient anterior guidance), and G47.33 (obstructive sleep apnea) when maxillary advancement is indicated. Documentation must demonstrate functional impairment, not purely esthetic concerns.

What is the global period for CPT 21143?

CPT 21143 has a 90-day global surgical period. This means routine postoperative care including office visits, splint adjustments, elastic changes, and uncomplicated follow-up for 90 days after surgery are included in the reimbursement and should not be billed separately. Only unrelated problems or complications requiring return to the OR can be billed separately with appropriate modifiers during this period.