Open repair of a complicated mandibular fracture requiring multiple surgical approaches, with internal fixation, interdental fixation, and/or wiring of dentures or splints.
Verified May 8, 2026 · 6 sources ↓
- Medicare
- $1,039.44
- Total RVUs
- 31.12
- Global, days
- 90
- Region
- Other
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 name each distinct surgical approach used (e.g., submandibular, retromandibular, transoral, preauricular) — 'multiple approaches' without specifics will not support 21470 over 21462
- Document fracture pattern and complexity: comminution, displacement, number of fracture sites, involvement of dentition or condyle
- Specify each fixation method employed: type and location of internal fixation plates/screws, arch bars, wire fixation, splints, or denture wiring
- Record intraoperative findings that distinguish this case from a routine open mandible repair, including any neurovascular involvement or prior surgical history
- ICD-10 diagnosis code must match fracture site and laterality (e.g., S02.60XA, S02.61XA, S02.69XA for initial encounter)
- Anesthesia type and total operative time should be documented to support medical necessity and any modifier 22 claim
Applicable modifiers
Modifiers commonly billed with this code.
Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual
What this code covers
Source · Editorial summary grounded in 6 cited references ↓
CPT 21470 covers open treatment of a complicated mandibular fracture when the complexity demands multiple surgical approaches in a single operative session — not just a single incision. The code captures the full construct: internal fixation hardware, interdental fixation, and/or denture or splint wiring, used in combination as the fracture pattern requires. It sits at the top of the mandibular fracture coding ladder, above 21461 (open, no interdental fixation), 21462 (open with interdental fixation), and 21465 (condylar fracture). Choosing 21470 over those codes requires documented justification — specifically, that multiple approaches were necessary.
The 90-day global period means all routine postoperative management, hardware checks, and interdental fixation adjustments through day 90 are bundled. Unrelated problems seen during that window require modifier 24 on the E/M; a staged or unrelated procedure needs modifier 79. The complexity threshold for 21470 also makes modifier 22 viable when operative time or difficulty substantially exceeds the norm — but that requires a detailed operative note and a cover letter to the payer, not just appending the modifier.
RVU & reimbursement
Component RVUs and Medicare national rate. Actual payment varies by GPCI locality.
Source · CMS Physician Fee Schedule, RVU26A · January 2026
| Work RVU | 17.1 |
| Practice expense RVU | 11.46 |
| Malpractice RVU | 2.56 |
| Total RVU | 31.12 |
| Medicare national rate | $1,039.44 |
| 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 | $1,039.44 |
HOPD (APC 5165) Hospital outpatient department | $6,048.05 |
ASC (PI J8) Ambulatory surgical center (freestanding) | $3,913.76 |
Common denial reasons
The recurring reasons claims for CPT 21470 get rejected.
Source · Editorial brief grounded in CMS NCCI edits, AAOS coding appeals, and cited references ↓
- Operative note documents only a single incision or approach — payers and auditors downcode to 21462 when multiple approaches are not explicitly named
- Missing or vague fixation details: noting 'fixation applied' without specifying internal vs. interdental vs. wiring does not meet 21470 specificity requirements
- Incorrect code selection when only one fracture site is treated via a single approach — 21462 or 21465 is more appropriate in those scenarios
- Global period violations: postoperative E/M billed within 90 days without modifier 24 when the visit is routine follow-up
- Laterality or site mismatch between the operative note diagnosis and the ICD-10 code submitted on the claim
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 6 cited references ↓
01What separates 21470 from 21462?
02Can 21470 be billed bilaterally with modifier 50?
03Is modifier 22 supportable for 21470?
04Can 21470 and 21462 be billed together for multiple mandibular fractures?
05What ICD-10 codes pair with 21470?
06How does the 90-day global period affect postoperative billing for 21470?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CMS Physician Fee Schedule 2026
- 02aapc.comhttps://www.aapc.com/codes/cpt-codes/21470
- 03emedny.orghttps://www.emedny.org/providermanuals/physician/pdfs/physician%20procedure%20codes%20sect5.pdf
- 04cms.govhttps://www.cms.gov/files/document/2025nccimedicarepolicymanualcompletepdf.pdf
- 05cgsmedicare.comhttps://www.cgsmedicare.com/medicare_dynamic/j15/partb/ptpb/ptp.aspx
- 06vsac.nlm.nih.govhttps://vsac.nlm.nih.gov/context/cs/codesystem/CPT/version/2024/code/21470/info
Mira AI Scribe
Mira's AI scribe captures the number and names of surgical approaches documented during dictation, the specific fixation constructs applied (plate and screw internal fixation, arch bar interdental fixation, denture or splint wiring), fracture site and comminution detail, and total operative time. That specificity prevents downcoding to 21462 — the single most common audit finding for 21470 is an operative note that says 'open reduction with fixation' without naming multiple distinct approaches.
See how Mira captures CPT 21470 documentation