CPT 21421Surgery

Cltx palatal/max fx wire fix

CPT code 21421 covers closed treatment of a broken upper jaw or palate (roof of the mouth) using wires to hold the bones in proper position while they heal, without making any surgical incisions.

Showing rates for

National Average

Base Medicare rate

$632.70

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

6.02

PE RVU (NF)

12.95

MP RVU

0.59

Total RVU

19.56

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

NCCI bundling edits

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Billing tips

Clearly document whether the procedure was performed in facility or non-facility setting, as this affects the PE RVU component
Impact: Non-facility setting yields $96.72 more per procedure ($632.70 vs $535.98)
Document the specific wiring technique used (interdental, circumdental, ivy loops) and number of teeth/segments involved for medical necessity
Impact: Detailed technique documentation reduces denial risk by approximately 35% and supports the 6.02 work RVUs assigned
When bilateral maxillary fractures are treated, append modifier 50 if payer policy allows, or bill two line items with LT/RT modifiers
Impact: Bilateral coding can increase reimbursement to 150% ($949.05) with modifier 50, versus two separate claims
Avoid bundling issues by not billing separate E/M codes on same date unless significant separately identifiable service with modifier 25
Impact: Improper E/M billing triggers automatic denials and potential recoupment of $100-200 per encounter
Verify anesthesia is billed separately with appropriate code (00190 or 00192) as 21421 is a surgical-only code
Impact: Ensures capture of additional $200-400 in anesthesia reimbursement not included in surgical fee
Submit claim within 90-day global period awareness, as follow-up wire removal may require modifier 58 if staged
Impact: Proper modifier usage prevents denial of legitimate secondary procedures worth $200-300

Applicable modifiers

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 21421 in 2025?

Medicare pays $632.70 for CPT 21421 in the non-facility setting and $535.98 in the facility setting based on the 2025 Physician Fee Schedule. The difference reflects higher practice expense costs when the procedure is performed in an office or non-hospital setting.

How many RVUs is CPT code 21421 worth?

CPT 21421 has a total of 19.56 RVUs, consisting of 6.02 work RVUs, 12.95 non-facility practice expense RVUs (9.96 for facility), and 0.59 malpractice RVUs. The work RVU of 6.02 reflects the physician effort, skill, and time required for the procedure.

Can CPT 21421 be billed with an E/M code on the same day?

Yes, but only with modifier 25 appended to the E/M code when a significant, separately identifiable evaluation and management service is performed beyond the decision for surgery. The E/M must address a separate diagnosis or represent a distinct service that goes beyond the typical pre-procedure assessment.

What is the global period for CPT code 21421?

CPT 21421 has a 90-day global period, meaning all routine follow-up care related to the wire fixation is included in the surgical fee for 90 days post-procedure. Any related complications requiring return to the operating room would require modifier 78, while unrelated procedures need modifier 79.

What modifiers are most commonly used with CPT 21421?

The most common modifiers are 62 (co-surgeons), 78 (return to OR for complication), 79 (unrelated procedure during global period), LT/RT (laterality), 50 (bilateral procedure), and 54 (surgical care only). Choice depends on the specific clinical and billing circumstances of each case.

Does CPT 21421 include the cost of wires and other supplies?

In the non-facility setting, supplies are included in the practice expense RVU component (12.95 PE RVUs). In the facility setting, the hospital bills separately for supplies using revenue codes, while the physician receives the reduced facility rate of $535.98 reflecting only professional services.

What is the difference between CPT 21421 and open reduction codes for maxillary fractures?

CPT 21421 is specifically for closed treatment using wire fixation without surgical incisions to expose the fracture site. Open reduction codes (21422-21423) involve surgical incisions, direct visualization of fracture fragments, and typically rigid internal fixation with plates and screws, resulting in higher reimbursement and work RVUs.