CPT 21198Surgery

Reconstr lwr jaw segment

CPT code 21198 covers surgical reconstruction of a segment of the lower jaw (mandible), typically performed after trauma, tumor removal, or congenital defects. This complex procedure involves rebuilding bone structure to restore jaw function and appearance.

Showing rates for

National Average

Base Medicare rate

$984.63

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

15.71

PE RVU (NF)

12.95

MP RVU

1.78

Total RVU

30.44

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

NCCI bundling edits

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Billing tips

Document the specific segment of mandible reconstructed (anterior, posterior, body, ramus) and defect size in centimeters
Impact: Prevents downcoding to simpler repair codes and supports medical necessity; can prevent denials worth the full $984.63
When using bone graft materials, separately report autogenous graft harvesting (20900-20902) as these are not bundled with 21198
Impact: Additional reimbursement of $200-$500 depending on graft site; common oversight results in lost revenue
For reconstructions following oncologic resection, ensure diagnosis code clearly indicates malignancy or history of malignancy (C00-C14, Z85.81x)
Impact: Supports medical necessity and may affect prior authorization approval; critical for private payer coverage
Submit modifier 22 claims with a cover letter quantifying additional work (time, complexity, blood loss) compared to typical case
Impact: Without comparative documentation, modifier 22 claims are routinely denied; proper documentation can add $200-$300
Verify global period management - 21198 carries a 90-day global period; all related postoperative care is included
Impact: Billing separately for routine follow-ups within 90 days will result in denials and potential audit flags
For cases involving implant placement with reconstruction, review whether implant insertion is separately reportable or considered integral to the reconstruction
Impact: Improper unbundling of implant codes can trigger recoupment of $300-$800; review NCCI edits carefully

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 21198 in 2025?

The 2025 Medicare national average reimbursement for CPT 21198 is $984.63 for both facility and non-facility settings. This rate is based on 30.44 total RVUs multiplied by the 2025 conversion factor of 32.3465.

How many RVUs is CPT code 21198 worth?

CPT 21198 has a total of 30.44 RVUs, consisting of 15.71 work RVUs, 12.95 practice expense RVUs, and 1.78 malpractice RVUs. This high RVU value reflects the complexity and intensity of mandibular reconstruction surgery.

Can CPT 21198 be billed with bone graft harvesting codes?

Yes, bone graft harvesting codes (20900-20902 for autogenous grafts) can be separately reported with CPT 21198 as they are not bundled. However, you must clearly document the separate graft harvest site and procedure in the operative note.

What is the global period for CPT 21198?

CPT 21198 has a 90-day global surgical period. All routine postoperative care related to the mandibular reconstruction is included in the reimbursement and cannot be billed separately during this period.

Does CPT 21198 require prior authorization from insurance?

Most commercial payers and Medicare Advantage plans require prior authorization for CPT 21198 due to its high cost and surgical complexity. Traditional Medicare does not require prior authorization, but medical necessity must still be documented. Verify with specific payer before scheduling.

What diagnosis codes support medical necessity for CPT 21198?

Common supporting diagnoses include malignant neoplasms of oral cavity (C00-C14), traumatic fractures of mandible (S02.6xx), congenital mandibular anomalies (Q67.4), medication-related osteonecrosis (M87.18x), and post-ablative reconstruction status (Z90.01). The diagnosis must demonstrate functional or reconstructive (not purely cosmetic) need.

How do I bill CPT 21198 when two surgeons work together?

When two surgeons of different specialties perform the mandibular reconstruction as co-surgeons, each surgeon bills CPT 21198 with modifier 62. Each surgeon receives 62.5% of the Medicare allowable ($615.39), and each must document their distinct portion of the procedure in separate operative notes.