CPT 21034Surgery

Excise max/zygoma mal tumor

CPT 21034 covers the surgical removal of a malignant (cancerous) tumor from the upper jaw bone (maxilla) or cheekbone (zygoma). This is a complex facial surgery requiring specialized skills and typically performed in a hospital or surgical center.

Showing rates for

National Average

Base Medicare rate

$1,262.48

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

17.38

PE RVU (NF)

19.22

MP RVU

2.43

Total RVU

39.03

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

NCCI bundling edits

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Billing tips

Document tumor size, exact anatomic location (maxilla vs zygoma vs both), and bone involvement extent in operative report
Impact: Prevents denials for medical necessity; supports modifier 22 consideration if appropriate, potentially adding $250-$380 to reimbursement
Verify place of service coding (21=inpatient hospital, 22=outpatient hospital, 24=ASC) matches claim as this affects facility vs non-facility rate
Impact: Difference of $165.61 between non-facility ($1262.48) and facility rate ($1096.87)
Bill pathology confirmation of malignancy separately (88305 or 88307) and ensure pathology report is available before claim submission
Impact: Separate reimbursement for pathology services; pathology documentation crucial for medical necessity validation
Link appropriate ICD-10 codes specifying malignant neoplasm site (C41.0 for maxilla, C41.0 for facial bones) with laterality
Impact: Prevents denial for lack of specificity; some payers require laterality (5th/6th character) for facial bone malignancies
Do not bundle reconstruction codes if performed same session; bill separately with modifier 59 if distinct from tumor excision
Impact: Reconstruction procedures (21141-21147) typically billable separately, adding $800-$2000+ depending on complexity
Submit operative report, pathology report, and preoperative imaging documentation with initial claim for high-dollar procedures
Impact: Reduces likelihood of automatic denial or documentation request, accelerating payment by 15-30 days average

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 21034 in 2025?

The 2025 Medicare national average payment for CPT 21034 is $1262.48 for non-facility settings and $1096.87 for facility settings, based on 39.03 total RVUs and the 32.3465 conversion factor from the CMS Physician Fee Schedule.

What is the difference between CPT 21034 and other maxillary tumor excision codes?

CPT 21034 specifically covers malignant tumor excision of the maxilla or zygoma requiring bone resection. Benign lesion removal is coded differently (21030, 21032), and more extensive resections involving partial or total maxillectomy use codes 31225-31230.

Can CPT 21034 be billed with reconstruction codes on the same date of service?

Yes, reconstruction procedures performed during the same operative session can typically be billed separately with appropriate modifiers (usually 59 or anatomic modifiers). Common reconstruction codes include 21141-21147 for maxillary reconstruction, but documentation must clearly show distinct procedures.

Is preoperative biopsy confirmation required before billing CPT 21034?

Yes, medical necessity for CPT 21034 requires documented malignancy, typically confirmed by preoperative biopsy. Payers will deny claims without pathology evidence of malignant neoplasm. Final pathology from the resection specimen should also confirm malignancy.

What modifiers are most commonly used with CPT 21034?

The most common modifiers for CPT 21034 are LT/RT (laterality), 80 (assistant surgeon), 22 (increased procedural services for complex cases), and 59 (distinct procedural service when billing with other facial procedures). Modifier 22 requires detailed documentation of additional complexity.

How many RVUs is CPT 21034 worth in 2025?

CPT 21034 has 39.03 total RVUs in 2025, comprised of 17.38 work RVUs, 19.22 non-facility practice expense RVUs (14.1 facility PE RVUs), and 2.43 malpractice RVUs, making it a high-value surgical procedure.

What ICD-10 codes are typically used with CPT 21034?

Common ICD-10 codes include C41.0 (malignant neoplasm of bones of skull and face), C03.0 (malignant neoplasm of upper gum), and site-specific codes for maxillary or zygomatic malignancies. Laterality specifications and histology-specific codes may be required depending on payer requirements.