Resect back tum 5 cm/>
CPT 21936 covers the surgical removal of a tumor or abnormal growth from the back that measures 5 centimeters (about 2 inches) or larger. This is a complex procedure requiring significant surgical expertise and documentation.
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
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
NCCI bundling edits
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Billing tips
Measure tumor size in three dimensions and document the greatest diameter in the operative report; tumors just under 5 cm should be coded with 21935 ($935.89), a $444.34 difference
Impact: Prevents $444.34 underpayment per case; ensures correct code selection based on documented size
Document depth of tumor (subcutaneous vs subfascial) as this determines code family selection; failure to document depth risks denial or request for records
Impact: Prevents delays in payment and reduces audit risk; depth documentation is required element for all soft tissue tumor resections
For tumors requiring reconstruction with flaps or grafts >15 sq cm, bill separately with appropriate flap codes (15734-15738) as these are not bundled with 21936
Impact: Can add $800-$3,000 in additional reimbursement for complex closures requiring tissue transfer
Submit pathology report with claim showing final tumor size, margins, and diagnosis; many payers require this for tumors at the 5 cm threshold
Impact: Reduces claim denials by 40-60% for size-based code selection; expedites payment on high-value claims
Use modifier 22 with detailed operative note when resection requires rib resection, paraspinal muscle resection, or extensive dissection near neurovascular structures
Impact: Can increase reimbursement by $276-$690 (20-50%) for significantly increased complexity
Do not bundle frozen section analysis (88331-88334) as this is separately billable and commonly performed for margin assessment in oncologic cases
Impact: Adds $150-$300 per case for intraoperative pathology consultation; ensure surgeon's order for frozen section is documented
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