CPT 11421Surgery

Exc h-f-nk-sp b9+marg 0.6-1

CPT 11421 covers the surgical removal of a benign (non-cancerous) skin growth or lesion on the head, face, neck, hands, feet, or genitals when the lesion plus the margin removed measures between 0.6 and 1.0 centimeters in diameter.

Showing rates for

National Average

Base Medicare rate

$154.62

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

1.47

PE RVU (NF)

3.15

MP RVU

0.16

Total RVU

4.78

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

NCCI bundling edits

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Billing tips

Measure the excised diameter (lesion + margins) accurately and document in operative note; 11421 covers 0.6-1.0cm. If total diameter is 1.1cm, use 11422 instead.
Impact: Undercoding by one size category costs $47.55 per lesion (difference between 11421 at $154.62 and 11422 at $202.17); overcoding risks audits and recoupment
Bill multiple excisions separately when performed; arrange codes by reimbursement amount (highest first) to maximize payment under multiple procedure reduction rules.
Impact: First excision pays 100%, second pays 50%, third+ pay 50%; proper sequencing on claim form can increase payment by 20-30% compared to random ordering
Verify anatomical location qualifies for 11421 series (head/face/neck/hands/feet/genitals); trunk/arms/legs use 11401 series with different rates.
Impact: 11421 pays $154.62 vs 11401 (trunk, 0.6-1.0cm) pays $134.89; using wrong anatomic series results in $19.73 underpayment or audit exposure
Confirm pathology report states 'benign' before final billing; if malignant, rebill using appropriate 11640-11646 codes for higher reimbursement.
Impact: Malignant excision codes pay significantly more (11642 for 0.6-1.0cm face pays $220.45 vs $154.62 for 11421); waiting for pathology prevents $65.83 loss per lesion
Document medical necessity clearly when performing excisions for cosmetic concerns; Medicare and many payers deny purely cosmetic procedures.
Impact: Lack of medical necessity documentation results in 100% denial ($154.62 loss); acceptable indications include bleeding, irritation, infection risk, or diagnostic uncertainty
Use modifier 59 or XS appropriately when billing multiple excisions; document separate sites to justify distinct procedures and avoid bundling denials.

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 11421 in 2025?

The 2025 Medicare national average payment for CPT 11421 is $154.62 in non-facility settings (office) and $107.07 in facility settings (hospital outpatient or ASC). Actual rates vary by geographic locality based on GPCI adjustments.

How do you measure lesion size for CPT 11421 billing?

Measure the total excised diameter, which includes the lesion diameter plus the narrowest margin taken on each side. For 11421, the total excised diameter must be 0.6 to 1.0 centimeters. Document both the original lesion size and the margin width to calculate the total excised diameter accurately.

What body locations qualify for CPT 11421 versus 11401?

CPT 11421 is used for excisions on the head, face, neck, hands, feet, and genitalia. CPT 11401 is for excisions on the trunk, arms, and legs. Using the correct anatomic series affects reimbursement, as the 1142x series typically pays higher due to cosmetic and functional sensitivity of these areas.

Can you bill multiple units of CPT 11421 for multiple lesion excisions?

Yes, bill each excision separately with appropriate modifiers (typically modifier 59 or anatomic modifiers). The first excision pays 100% ($154.62), while subsequent excisions pay at 50% ($77.31 each) due to multiple procedure reduction rules. Always list procedures in descending fee order.

What is the difference between CPT 11421 and 11642?

CPT 11421 is for excision of benign lesions (0.6-1.0cm) on face/neck/hands/feet/genitals, while 11642 is for excision of malignant lesions (0.6-1.0cm) on the same locations. The malignant code 11642 pays significantly more ($220.45 vs $154.62) and requires pathology confirmation of malignancy. Always wait for pathology results before final code selection.

Does CPT 11421 include closure of the wound?

Yes, CPT 11421 includes simple (one-layer) closure. If intermediate (layered) closure is required, you can separately bill 12051-12057 based on wound length. Complex closure or adjacent tissue transfer would use separate codes (13100+ or 14000+ series). Only bill separate closure codes when complexity exceeds simple closure.

What diagnosis codes support medical necessity for CPT 11421?

Common supporting ICD-10 codes include D23.x (benign neoplasm of skin), L82.x (seborrheic keratosis), D22.x (melanocytic nevi), L91.0 (hypertrophic scar), or L98.9 (skin disorder). Documentation must show symptoms like bleeding, pain, irritation, or infection to establish medical necessity, as purely cosmetic removals are typically non-covered by Medicare.