Summary & Overview

CPT 11421: Excision of Benign Skin Lesion 0.6–1.0 cm

Headline: CPT code 11421 defines excision of a benign skin lesion 0.6–1.0 cm, a common ambulatory dermatologic procedure.

Lead: CPT code 11421 covers surgical removal of noncancerous skin lesions between 0.6 and 1.0 cm in diameter from anatomically sensitive areas including the scalp, neck, hands, feet, and genitalia. The code is widely used across outpatient surgical settings and dermatology practices and is relevant to payers, surgeons, and facility billing teams.

Why it matters: Nationally, minor skin excisions represent a frequent source of surgical and office-based procedural billing. Accurate use of CPT code 11421 affects coding integrity, claims processing, and appropriate payment for procedures performed on anatomically sensitive sites where technique and closure may differ from other locations.

Payers covered: This analysis addresses coverage and billing contexts for Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.

What readers will learn: The publication provides benchmarks and clinical context for CPT code 11421, including typical sites of service and service type, common payer considerations, and coding boundaries that distinguish this code from excisions of other sizes or malignant lesions. It summarizes typical clinical scenarios for use of the code and notes where additional documentation may be required for claims. Data not available in the input is indicated where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare11421CPTskin lesion excisiondermatologic surgeryoutpatient surgeryprocedure codingsurgical excisionwound closure

Billing Code Overview

CPT code 11421 describes the excision of a benign (noncancerous) skin lesion, excluding skin tags, measuring 0.6 to 1.0 cm in diameter (including margins). The procedure involves surgical removal of the lesion and closure of the wound.

Service Type: Surgical skin lesion excision

Typical Site of Service: Scalp, neck, hands, feet, or genitals

Clinical & Coding Specifications

Clinical Context

A 52-year-old patient presents to an outpatient dermatology clinic with a slowly enlarging, noncancerous papule on the dorsal surface of the right hand measuring approximately 0.8 cm in greatest diameter. The lesion is symptomatic with occasional snagging on clothing. After history and focused skin exam, the dermatologist documents that the lesion is benign in appearance (e.g., intradermal nevus or dermatofibroma) and elects to perform a simple excision for definitive removal and pathology if indicated. Local anesthesia (e.g., 1% lidocaine) is administered, sterile preparation is performed, and the provider performs an elliptical excision including margins with primary closure. The procedure is performed in the office-based procedure room with routine postoperative instructions and wound care. Specimen is sent to pathology if provider documents need for histologic confirmation. Typical workflow includes pre-procedure consent, marking and photography as needed, time for local anesthetic onset, excision with hemostasis, layered closure, dressing, and documentation of lesion size including margins to support code selection.

Coding Specifications

Modifier	Description	When to Use
`RT`	Right side	Use when the excised lesion is on the right side of the body (e.g., right hand).
`LT`	Left side	Use when the excised lesion is on the left side of the body.
`59`	Distinct procedural service	Use when a different procedure or a separate lesion excision on a different site is performed the same day and needs to be reported separately.
`51`	Multiple procedures	Use when multiple procedures are performed at the same session in addition to the excision and payer requires this modifier for multiple-services reporting.
`25`	Significant, separately identifiable E/M (note: not in provided list)	Data not available in the input.
`52`	Reduced services	Use when the excision is started but discontinued or performed in a reduced manner.
`53`	Discontinued procedure	Use when the procedure is terminated due to extenuating circumstances.
`59`	Distinct procedural service	Duplicate entry — see above.
`26`	Professional component	Use when reporting only the professional component of a service that has distinct technical and professional components (rare for simple skin excision).
`GC`	This service has been performed in part by a resident under the direction of a teaching physician	Use when a resident performed parts of the procedure and the teaching physician documents appropriate supervision.
`GE`	Service furnished under a primary care exception (not in provided list)	Data not available in the input.

Taxonomy Code	Specialty	Notes
Data not available in the input.	Dermatology	Dermatologists most commonly perform skin lesion excisions in outpatient settings.
Data not available in the input.	General Surgery	General surgeons perform excisions of skin lesions in various anatomic locations, especially when deeper or complex closure is anticipated.
Data not available in the input.	Plastic Surgery	Plastic surgeons perform excisions when reconstruction or cosmetic concerns are primary considerations.
Data not available in the input.	Family Medicine	Family physicians commonly perform straightforward outpatient skin lesion excisions in office settings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
Data not available in the input.	Data not available in the input.	Data not available in the input.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`11300`	Shaving of epidermal or dermal lesion; single lesion	Performed when a lesion is more appropriate for shave removal rather than full-thickness excision; alternative technique for small benign lesions.
`11420`	Excision, benign lesion including margins; 0.5 cm or less (except skin tag)	Adjacent size-based code used when lesion diameter (including margins) is 0.5 cm or smaller; selected if measured size differs.
`11422`	Excision, benign lesion including margins; 1.1 to 2.0 cm	Next size increment when the excised lesion including margins measures larger than 1.0 cm.
`12031`	Repair, intermediate, wounds of scalp, arms, and/or legs; 2.6 cm to 7.5 cm	Used when the excision requires intermediate layered closure of the resulting defect and closure complexity meets repair code criteria.
`11102`	Tangential biopsy of skin lesion (shave), single lesion	Diagnostic alternative when provider selects a biopsy rather than complete excision for diagnosis.