Open treatment of a mandibular fracture using an external fixation device to stabilize the lower jaw while it heals.

Verified May 8, 2026 · 5 sources ↓

Medicare: $450.58
Work RVU: 7.18
Global, days: 90
Region: Other

Drawn from CMSAAPCFastrvu

Documentation requirements

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

Source · Editorial brief grounded in 5 cited references ↓

Confirm the fracture as open treatment — document direct surgical access to the fracture site
Identify the specific fracture site(s) on the mandible (symphysis, parasymphysis, body, angle, ramus, condyle, etc.) with imaging correlation
Describe the external fixation device type, pin/wire placement locations, and how stability was confirmed intraoperatively
Document the mechanism of injury and clinical indication for external versus internal fixation
Record pre- and post-reduction alignment, including intraoperative imaging or assessment used to verify reduction
If billing additional fracture codes at the same session, document each site as anatomically distinct with separate technique descriptions

Applicable modifiers

Modifiers commonly billed with this code.

Source · AMA CPT modifier descriptors · CMS NCCI Policy Manual

22 Increased complexity 51 Multiple procedures 58 Staged or related 59 Distinct service 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 5 cited references ↓

CPT 21454 covers open surgical treatment of a mandibular fracture where the surgeon accesses the fracture site directly and applies an external fixation device to hold the bone segments in proper alignment during healing. This differs from closed or open reduction with internal fixation — the fixator remains external to the skin, with pins or wires transcutaneously anchoring the device to the mandible.

The 90-day global period means all routine post-op care, pin-site checks, and device adjustments performed by the operating surgeon are bundled through day 90. Unrelated E/M visits or procedures in that window require modifier 24 or 79, respectively. If a planned staged procedure follows — such as fixator removal — use modifier 58.

When multiple mandibular fracture sites are treated at the same operative session using different fixation methods (e.g., external fixation at one site, open reduction with internal fixation at another), the separately treated site may be additionally reported with modifier 59 to bypass NCCI bundling edits, provided documentation clearly distinguishes the anatomically separate sites and techniques.

RVU & reimbursement

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

Source · CMS Physician Fee Schedule, RVU26A · January 2026

Work RVU vs. total RVU

The work RVU (7.18) is the surgeon's own effort — the figure physician pay and productivity targets are built on. The total RVU (13.49) adds practice overhead and malpractice, and is what drives the Medicare payment below.

Work RVU	7.18
Practice expense RVU	5.49
Malpractice RVU	0.82
Total RVU	13.49
Medicare national rate	$450.58
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	$450.58
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 21454 get rejected.

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

Insufficient documentation distinguishing open treatment from closed reduction — notes that don't describe surgical access to the fracture site
Missing or mismatched ICD-10-CM mandibular fracture diagnosis code — payers reject claims when the dx code doesn't specify the correct fracture site or laterality
Bundling denials when 21454 is billed with other mandibular fracture codes at the same session without modifier 59 and anatomically distinct documentation
Post-op visits billed within the 90-day global period without modifier 24 for unrelated E/M encounters
Claims submitted without operative report or with a generic note that doesn't name the fixation device or confirm open surgical access

Frequently asked questions

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

01What separates 21454 from 21453 or 21461?

21453 is closed treatment of a mandibular fracture without manipulation, and 21461 is open treatment using internal fixation. 21454 is specifically open treatment with external fixation. The fixator remains outside the skin — that's the defining feature. If you used plates and screws internally, 21461 or 21462 applies instead.

02Can I bill 21454 and 21461 together if both external and internal fixation were used at different fracture sites?

Yes, if the fracture sites are anatomically distinct and each technique is separately documented. Use modifier 59 on the secondary code to override NCCI bundling. The operative note must identify each site independently — a note describing 'multiple fractures treated' without site-specific technique detail won't survive a bundling challenge.

03Is fixator removal billable separately after 21454?

If removal occurs within the 90-day global period, it's bundled unless it requires a return to the OR for a reason beyond routine post-op care. A planned staged removal in the OR uses modifier 58. An unplanned return for a complication related to the fixation uses modifier 78.

04How does the 90-day global period affect E/M billing for a patient with other injuries?

E/M visits for conditions unrelated to the mandibular fracture are billable within the global period with modifier 24. The documentation must clearly show the visit addressed a separate problem — a note that mixes fracture follow-up with the unrelated complaint will get the modifier overridden on audit.

05Does site of service affect payment for 21454?

Yes. The HOPD and ASC payment rates differ substantially — see the Site of Service comparison on this page. The physician's professional fee is also subject to a site-of-service differential under the CMS Physician Fee Schedule 2026, paying less when the procedure is performed in a facility setting versus non-facility.

06What ICD-10-CM codes are typically paired with 21454?

Mandibular fracture codes from the S02.6x category are the standard match — specificity matters. Code to the exact site (body, angle, symphysis, condylar process, etc.) and include laterality where applicable. A nonspecific fracture code or a code that doesn't align with the documented surgical site is a primary denial trigger.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira Scribe

Mira's AI scribe captures the fracture site name, surgical access description, external fixator type and pin placement details, and intraoperative reduction confirmation directly from dictation. That prevents the most common audit flag for 21454: an operative note that documents fixation without establishing that the fracture was accessed openly — a distinction that separates this code from closed reduction alternatives and is the first thing a reviewer checks.

See how Mira captures CPT 21454 documentation