FAQ: What are derm CPT codes and how can dermatology practices ensure their correct usage?

 Derm CPT codes (short for dermatology Current Procedural Terminology codes) are a set of standardized numerical codes used to describe the various procedures and services provided by dermatologists. These codes are critical in communicating with insurance payers about what services were performed, and they directly impact claim approvals and reimbursement amounts.

Some common derm CPT codes include:

  • 11102 – Tangential biopsy of skin

  • 11401 – Excision of benign lesion (0.6 to 1.0 cm)

  • 17000 – Destruction of the first premalignant lesion (e.g., actinic keratosis)

  • 17311 – Mohs surgery, first stage

To ensure proper usage of derm CPT codes, dermatology practices should:

  1. Stay updated on annual code changes issued by the AMA (American Medical Association).

  2. Document thoroughly — ensure all procedures are clearly recorded to support the codes billed.

  3. Differentiate between cosmetic and medically necessary procedures, since cosmetic services are generally not covered by insurance.

  4. Use modifiers appropriately — such as -25 for significant, separately identifiable E/M services, or -59 for distinct procedural services.

Errors in derm CPT coding can result in claim denials, payment delays, and compliance issues. Partnering with dermatology billing experts or certified coders can greatly improve accuracy, reduce revenue leakage, and streamline the reimbursement process

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