CPT 21046Surgery

Remove mandible cyst complex

CPT 21046 covers the surgical removal of a complex cyst in the jawbone (mandible), requiring more extensive dissection and reconstruction than a simple cyst removal. This is an inpatient or outpatient hospital procedure performed by oral surgeons or head and neck specialists.

Showing rates for

National Average

Base Medicare rate

$963.28

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

14.21

PE RVU (NF)

14.1

MP RVU

1.47

Total RVU

29.78

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

NCCI bundling edits

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Billing tips

Document complexity features explicitly in operative note: cyst size in centimeters, relationship to inferior alveolar nerve, cortical perforation, multilocular nature, or tooth root involvement
Impact: Prevents downcoding to 21040 (simple cyst removal, pays significantly less). Comprehensive documentation protects full $963.28 reimbursement.
Include preoperative imaging reports (CT, CBCT, panorex) in claim submission showing extent and complexity of lesion
Impact: Reduces medical necessity denials by 60-75% and supports complexity justification versus simpler codes
Verify facility vs non-facility setting payment - both pay $963.28 for 21046, but site of service must be correctly coded on claim form
Impact: Incorrect place of service coding can trigger automatic denial requiring resubmission and 30-45 day payment delay
When performed with tooth extraction, bill extractions separately (70XX series) with modifier 59 only if clearly distinct and separately identifiable
Impact: Bundling edits may apply; improper unbundling risks audit findings, but appropriate separate reporting can add $100-300 per extraction
For Medicare patients, confirm 90-day global period and avoid billing separately for routine postoperative visits
Impact: Billing E/M visits during global period without appropriate modifiers results in automatic denials and potential prepayment review
If pathology reveals ameloblastoma or other aggressive lesion requiring secondary resection, document as new diagnosis and bill subsequent procedure with modifier 79
Protects full reimbursement for secondary definitive procedure that would otherwise be bundled into global period

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Frequently asked questions

What is the difference between CPT 21046 and 21040?

CPT 21046 is for complex mandibular cyst removal requiring extensive bone work, proximity to vital structures, or reconstruction considerations, paying $963.28. CPT 21040 covers simple cyst excision with minimal bone removal and lower complexity. The key differentiator is surgical complexity, cyst size (typically >3cm for complex), multilocular nature, and relationship to nerves or teeth.

How much does Medicare pay for CPT code 21046 in 2025?

Medicare pays $963.28 for CPT 21046 in 2025 (national average) for both facility and non-facility settings. This is based on 29.78 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic locality adjustment (GPCI factors).

Can CPT 21046 be billed with tooth extraction codes?

Yes, but only when the cyst excision is clearly separate and distinct from the extraction procedure. Use modifier 59 to indicate distinct procedural service. Documentation must show the cyst extended beyond the extraction socket, required separate surgical access, and involved additional bone removal. Many payers bundle extractions with cyst removal, so expect potential denials requiring appeal.

What RVU value is assigned to CPT 21046?

CPT 21046 has 29.78 total RVUs for 2025: 14.21 work RVUs, 14.1 practice expense RVUs (both facility and non-facility), and 1.47 malpractice RVUs. The high work RVU reflects significant surgical complexity and physician effort required for complex mandibular cyst removal.

Is CPT 21046 covered by insurance?

Most insurance plans including Medicare cover CPT 21046 when medically necessary, typically for symptomatic cysts, growing lesions, infection risk, or pathologic fracture potential. Prior authorization may be required by commercial payers. Medical necessity must be documented with clinical findings and imaging showing why surgical removal is indicated versus observation or conservative management.

What documentation is needed to bill CPT 21046?

Required documentation includes: preoperative imaging (CT/CBCT/panorex) showing cyst extent, detailed operative note describing complexity features (size >3cm, nerve proximity, multilocular nature, cortical perforation), specific bone removal performed, pathology submission, and medical necessity justification. Without documented complexity features, payers will downcode to simpler cyst removal codes.

What is the global period for CPT 21046?

CPT 21046 has a 90-day global period under Medicare. This means routine postoperative care for 90 days after surgery is included in the $963.28 payment and cannot be billed separately. Only complications, unrelated problems, or return to OR scenarios can be billed during this period with appropriate modifiers (78, 79, or 24).