Surgical · Other

Complete reconstruction of the mandible or maxilla using an endosteal implant (blade or cylinder type) placed within the jawbone

Verified May 8, 2026 · 5 sources ↓

Medicare: $1,404.51
Total RVUs: 42.05
Global, days: 90
Region: Other

Drawn from CMSAAPCFindacode

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 specify complete (not partial) extent of mandibular or maxillary reconstruction
Identify the type of endosteal implant used — blade or cylinder — by name in the operative report
Document the underlying indication: trauma, tumor resection, osteonecrosis, congenital defect, or other pathology
Record the anatomic site explicitly — mandible versus maxilla — since 21248 and 21249 apply to both and payers audit for specificity
Document number of implants placed, but bill only one unit of 21249 regardless of implant count
Pre-operative imaging (CT or panoramic radiograph) supporting the need for complete reconstruction should be in the record

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 52 Reduced services 76 Repeat, same physician 77 Repeat, another physician 78 Unplanned return — related 79 Unrelated during global 80 Assistant surgeon

What this code covers

Source · Editorial summary grounded in 5 cited references ↓

CPT 21249 covers complete reconstruction of the mandible or maxilla with an endosteal implant — blade or cylinder type — used to restore jaw structure lost to trauma, tumor resection, or congenital defect. The key distinction from 21248 is completeness: 21249 is for full reconstruction, not partial. When choosing between the two, the operative note must clearly characterize the extent of the reconstruction.

The unit of service is the reconstruction itself, not the implant. Per CMS NCCI policy, billing multiple units because multiple implants were placed is incorrect — one reconstruction, one unit. This applies under both Medicare and Medicaid NCCI edits.

The 90-day global period means all routine post-op management through day 90 is included. Unplanned returns to the OR for related complications during that window require modifier 78. Unrelated procedures in the global period require modifier 79. Given that this code is billed almost exclusively by oral surgeons, payers will scrutinize claims from other specialties; document provider credentials and clinical necessity explicitly.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU	18.3
Practice expense RVU	21.44
Malpractice RVU	2.31
Total RVU	42.05
Medicare national rate	$1,404.51
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	$1,404.51
HOPD (APC 5165) Hospital outpatient department	$6,048.05
ASC (PI A2) Ambulatory surgical center (freestanding)	$3,025.62

Common denial reasons

The recurring reasons claims for CPT 21249 get rejected.

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

Upcoding flag when documentation supports only partial reconstruction — use 21248 for partial, 21249 for complete
Multiple units billed per implant placed — NCCI policy is explicit: one unit per reconstruction, not per implant
Missing laterality or anatomic specificity in the operative note triggers medical necessity review
Non-oral-surgeon billing this code without supporting documentation of scope and credentials draws payer scrutiny
Unbundling imaging guidance billed separately when it is integral to the surgical procedure

Frequently asked questions

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

01What separates 21249 from 21248?

21248 is partial reconstruction of the mandible or maxilla with endosteal implant. 21249 is complete reconstruction. The operative note must support the extent billed — 'complete' needs to be documented explicitly, not inferred.

02Can I bill one unit of 21249 per implant placed?

No. CMS NCCI policy is unambiguous: the unit of service is the reconstruction, not the endosteal implant. Bill one unit of 21249 regardless of how many implants were placed during that reconstruction.

03Does the 90-day global cover implant-related complications managed in the office?

Yes. Routine post-operative management — including management of minor wound issues or implant-site checks — is bundled into the 90-day global. Only use modifier 24 for unrelated E/M visits or modifier 78 if the patient requires an unplanned return to the OR for a complication.

04Is modifier 22 appropriate for exceptionally complex jaw reconstructions?

Yes, when documented. The operative note must describe what made the case significantly more work than typical — prior radiation, severe bone loss, multiple prior failed reconstructions, or prolonged operative time — and the record must support the claim. Payers will request records when modifier 22 is appended.

05Can 21249 be billed for both mandible and maxilla at the same operative session?

Billing 21249 twice for simultaneous mandibular and maxillary reconstruction at the same encounter is high-risk and will trigger NCCI review. If both structures were reconstructed, documentation must clearly establish two distinct complete reconstructions at different anatomic sites. Verify payer-specific policy before submitting.

06What ICD-10 diagnoses typically support 21249?

Common supporting diagnoses include acquired deformity of jaw from tumor resection, traumatic bone loss, osteonecrosis of the jaw, and congenital jaw anomalies. The diagnosis must match the documented clinical indication — a mismatch between the ICD-10 and operative findings is a top claim rejection trigger.

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 extent of reconstruction (complete vs. partial), implant type (blade or cylinder), anatomic site (mandible or maxilla), and the clinical indication driving the procedure. That specificity prevents the most common denial on this code — downgrade to 21248 because the note didn't clearly establish completeness — and protects against NCCI unit-of-service errors when multiple implants are placed.

See how Mira captures CPT 21249 documentation