Summary & Overview
CPT 10040: Extraction of Skin Lesions (Milia, Comedones, Cysts, Pustules)
CPT code 10040 represents a minor dermatologic operative procedure for extraction of skin lesions such as milia, comedones, cysts, or pustules and may involve opening, draining, or removing the lesion. Nationally, this code captures a common, low-complexity procedural service performed in outpatient and office settings by dermatologists and other clinicians trained in minor skin procedures. It matters for billing clarity, coding consistency, and outpatient procedural workflows given its frequent use across ambulatory care.
Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of the clinical context for the procedure, common sites of service, and the payer landscape relevant to coverage and claims processing. The publication also summarizes benchmarks and policy updates where available, practical coding and billing considerations, and crosswalks to related procedural categories. Data limitations are noted where input fields were not provided.
This resource is intended to help billing staff, clinicians, and policy analysts understand the clinical definition, service settings, and payer scope associated with CPT code 10040 to support accurate documentation and claims submission.
Billing Code Overview
CPT code 10040 describes the clinical procedure of extracting skin lesions such as milia, comedones, cysts, or pustules. The service entails opening, draining, or removing the lesion to resolve localized skin findings.
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Service type: Dermatologic operative procedure for lesion extraction
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Typical site of service: Office or outpatient clinic setting, dermatology procedural suite, or other ambulatory care environments where minor skin procedures are performed.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult presenting to an outpatient dermatology or primary care clinic with one or more benign-appearing, localized skin lesions such as milia, comedones (blackheads/whiteheads), epidermal inclusion cysts, or small pustules causing discomfort, cosmetic concern, or recurrent inflammation. The clinician performs a focused history and skin exam, documents lesion location, size, and signs of infection or inflammation, and counsels the patient on treatment options. For extraction using 10040, the provider may cleanse the area, use topical or local anesthesia as indicated, dilate or incise the lesion if necessary, express or curette the contents, and apply dressing. Typical workflow includes consent, procedure documentation (technique, number of lesions, anesthesia, complications), and post-procedure instructions. Site of service is most commonly an outpatient dermatology clinic or primary care office; minor procedures may also occur in ambulatory surgery centers when multiple or complex extractions are required. Common clinical indications include cosmetically bothersome comedones, symptomatic milia, non-inflamed cysts amenable to expression, and isolated pustular lesions not requiring formal incision and drainage under higher-level codes.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service on the same day |