CPT 21550Surgery

Biopsy of neck/chest

CPT code 21550 covers a surgical biopsy of soft tissue in the neck or chest area, where a physician removes a small tissue sample for laboratory examination to diagnose conditions like tumors, infections, or other abnormalities.

Showing rates for

National Average

Base Medicare rate

$256.83

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

2.11

PE RVU (NF)

5.53

MP RVU

0.3

Total RVU

7.94

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

NCCI bundling edits

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Billing tips

Verify place of service coding carefully - billing as non-facility (office/ASC with modifier) versus facility determines $104.48 payment difference
Impact: Incorrect POS coding can result in $104.48 underpayment or trigger recoupment demands
Document the medical necessity for open biopsy over less invasive approaches (needle biopsy) to prevent downcoding or denial
Impact: Lack of justification can result in denial or downcoding to 10021 (fine needle aspiration) at approximately $93 less reimbursement
Ensure pathology report confirms tissue origin from neck or chest soft tissue; ambiguous documentation may trigger anatomic site denials
Impact: Site verification prevents denials and potential audits that could affect entire claim payment of $256.83
Do not bill separately for closure when performed as part of the biopsy procedure; intermediate closure is included in 21550
Impact: Unbundling closure codes (12031-12057) will result in denial and potential fraud investigation
For multiple biopsies in same area, bill 21550 once with modifier 22 and detailed documentation rather than multiple units
Impact: Modifier 22 can increase reimbursement 20-30% ($51-77 additional) versus denial of additional units
Coordinate with pathology to ensure specimen is coded appropriately (88305 vs 88307) based on tissue type and clinical indication
Impact: Proper pathology coordination supports medical necessity and prevents downstream audit triggers

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 21550 in 2025?

The 2025 Medicare national average reimbursement for CPT 21550 is $256.83 in non-facility settings and $152.35 in facility settings. The difference reflects practice expense variations, with non-facility rates compensating for overhead costs when performed in office-based settings.

What is the difference between CPT 21550 and a needle biopsy of the neck?

CPT 21550 is an open surgical biopsy requiring incision and direct visualization, while needle biopsies (10021, 10022) are percutaneous procedures using image guidance. The open approach provides larger tissue samples and is used when needle biopsy is inadequate, contraindicated, or when the lesion location requires surgical exposure.

Can CPT 21550 be billed with an excision code on the same day?

Generally no, unless they represent distinct procedures on separate lesions. If a biopsy is performed and then immediately followed by excision of the same lesion, only the excision code should be reported. Use modifier 59 only when documenting truly separate and distinct procedures with clear medical necessity for both.

How many RVUs is CPT code 21550 worth?

CPT 21550 has a total RVU value of 7.94, consisting of 2.11 work RVUs, 5.53 non-facility practice expense RVUs (2.3 facility PE RVUs), and 0.3 malpractice RVUs based on the 2025 Medicare Physician Fee Schedule.

What documentation is required to bill CPT 21550?

Required documentation includes medical necessity justification for open biopsy, specific anatomic location in neck or chest with landmarks, detailed operative report describing incision and dissection, tissue characteristics and amount obtained, closure technique, and pathology report confirming specimen origin and diagnosis.

Does CPT 21550 include closure of the biopsy site?

Yes, simple and intermediate closure are included in CPT 21550 and should not be billed separately. Only complex closure requiring more than layered closure of subcutaneous tissue and skin may be separately reportable with appropriate documentation and modifier, though this is rarely applicable to standard biopsy procedures.

What modifiers are commonly used with CPT 21550?

Common modifiers include LT/RT for laterality specification, modifier 50 for bilateral procedures (150% payment), modifier 59 for distinct procedural services, and modifier 25 when a separate E/M service is provided the same day. Modifier 22 may be appropriate for increased procedural complexity with detailed documentation.