CPT code 17264: Destruction of malignant skin lesion (3.1-4.0 cm)

Key takeaways

CPT code 17264 describes destruction of a malignant skin lesion on the trunk, arms, or legs with a lesion diameter of 3.1 to 4.0 cm.

Qualifying destruction methods include cryosurgery, electrosurgery, laser surgery, chemosurgery, and surgical curettement. The method used does not change the code.

Medicare covers 17264 when medical necessity is supported by pathology-confirmed malignancy documentation. Reimbursement rates change annually and must be verified against the current CMS Physician Fee Schedule.

Pabau’s claims management software helps dermatology and skin practices reduce 17264 claim errors through integrated clinical documentation and automated billing workflows.

CPT code 17264 belongs to the Surgery section of the CPT code set, within the Integumentary System subsection (codes 10000-19999). The official AMA descriptor reads: Destruction, malignant lesion (e.g., laser surgery, electrosurgery, cryosurgery, chemosurgery, surgical curettement), trunk, arms or legs; lesion diameter 3.1 to 4.0 cm.

A key distinction: this code applies only to malignant lesions. Benign lesion destruction is reported separately (codes 17000-17004 for actinic keratoses or 17110-17111 for warts and other benign lesions). Billing 17264 without pathology confirming malignancy is a medical necessity failure and a common audit trigger. Practices running full-body mole mapping workflows should ensure biopsy results are documented in the patient record before submitting any code from the 17260-17286 series.

Destruction methods covered under CPT 17264

CPT code 17264 is method-agnostic. Any of the following destruction modalities qualifies, and the choice of method does not change which code to report:

• Cryosurgery (liquid nitrogen or cryoprobe freezing)
• Electrosurgery (electrodesiccation, fulguration, or loop excision-destruction)
• Laser surgery (ablative laser destruction)
• Chemosurgery (Mohs-adjacent chemical destruction, not Mohs micrographic surgery itself)
• Surgical curettement (scraping with a curette, often combined with electrodesiccation)

Note: Mohs micrographic surgery (CPT 17311-17315) is a separate code family with its own rules. Do not report 17264 when Mohs technique is used. Skin graft procedures under 15120 are a separate family too, used only after excision or grafting, not destruction.

Anatomical location and lesion size: Selecting the right code in the 17260-17286 series

Code selection within the malignant lesion destruction series depends on two variables: anatomical location and lesion diameter. Getting either wrong means billing the wrong code. The 17260-17286 series divides by three anatomical groupings, each with its own size-based sub-codes.

Lesion measurement rule: Per AMA CPT Surgery Guidelines, lesion diameter is measured at its widest point before destruction, not including surgical margins. Document the pre-destruction measurement in the operative note. A lesion measured at 3.2 cm goes to 17264. A lesion measured at 4.1 cm goes to 17266.

The 3.1 to 4.0 cm tier repeats for the other anatomical groups under different code numbers. The scalp, neck, hands, feet, and genitalia group uses 17274. The face, ears, eyelids, nose, lips, and mucous membrane group tops out at 17286 for lesions over 4.0 cm.

CPT code 17264 modifiers

Modifier selection for CPT code 17264 depends on the clinical scenario. Applying the wrong modifier, or omitting a required one, is one of the most common audit triggers for this code series.

Verify modifier requirements against current payer policies before submitting. Medicare and commercial payers may have differing rules for the same modifier, particularly -51 and -59. Incorrect modifier application is a documented audit trigger for the malignant lesion destruction code series.

ICD-10-CM diagnosis codes used with CPT 17264

CPT code 17264 requires a supporting ICD-10-CM diagnosis code that establishes medical necessity. The diagnosis must reflect confirmed or suspected malignancy at the anatomical site treated. Use the CrossCoder ICD-10 crosswalk tool to verify current diagnosis-to-procedure pairings for your payer mix.

Confirm ICD-10-CM code validity for the current coding year before submitting. Codes in the C44-series (other and unspecified malignant neoplasm of skin) carry specificity requirements. Use the most specific code available, including laterality qualifiers where applicable. Verify current codes against the CDC ICD-10-CM tool.

Medicare reimbursement for CPT code 17264

Medicare reimburses CPT code 17264 under the Physician Fee Schedule (PFS), with separate rates for facility and non-facility settings. Rates are adjusted by geographic practice cost indices (GPCI) and change each calendar year. The figures below reflect approximate national averages. Always verify current-year rates using the CMS Physician Fee Schedule lookup tool before submitting claims.

For current RVU values and calculated payment amounts, use the FastRVU 2026 lookup tool, which pulls directly from the CMS Physician Fee Schedule. Medicare payment rates change annually on January 1. Do not rely on prior-year figures. Non-facility rates are generally higher because the practice absorbs the overhead costs that a facility would otherwise cover.

Billing and coding guidelines for destruction of malignant skin lesions

Accurate billing for CPT code 17264 depends on more than selecting the correct code. NCCI bundling rules, medical necessity requirements, and documentation standards all affect whether a claim pays on first submission. Practices managing medical spa compliance requirements alongside dermatology-specific practice management software should build these rules into their pre-submission workflow.

NCCI bundling rules

The National Correct Coding Initiative (NCCI) publishes edit tables that determine which code pairs bundle together when billed on the same date of service. For CPT code 17264, the most common bundling issues arise when:

• A biopsy (e.g., CPT 11102-11107) and destruction of the same lesion are billed on the same date. Payers typically bundle the diagnostic procedure into the definitive treatment.
• Multiple destruction codes from the same series are billed for lesions at different size tiers. Each lesion gets its own code based on its diameter, but documentation must support separate lesions.
• An E/M service is billed same-day with 17264. This requires a -25 modifier on the E/M to establish a separately identifiable reason for the office visit.

Verify NCCI edits against current tables published by CMS. NCCI edit pairs change quarterly, so a combination that was separately billable in Q1 may be bundled by Q3. Practices with HIPAA-compliant billing workflows should ensure their software flags NCCI conflicts before claims are submitted.

Documentation requirements

Medicare and most commercial payers require specific documentation to support medical necessity for CPT code 17264 claims. Incomplete records are the leading cause of claim denial and post-payment audit recovery for this code. Using digital intake forms and structured clinical notes reduces the risk of missing required elements. The required documentation checklist includes:

• Pathology or biopsy report confirming malignant diagnosis (biopsy result date, type of malignancy, and affected site must all be present)
• Pre-destruction lesion measurement, recorded at the widest diameter in the operative note. For 17264, this must be between 3.1 and 4.0 cm.
• Anatomical site specificity: document exact location (e.g., “left anterior trunk,” “right forearm”) and laterality.
• Destruction method used and its clinical rationale
• Treatment plan rationale establishing why destruction was chosen over excision or other modalities
• Physician signature and date on all relevant clinical documentation

Maintaining these records in structured, searchable form matters. Patient data security tools that store clinical notes and pathology results in an integrated record reduce the risk of missing documentation surfacing during an audit. Review your documentation standards against the AAPC CPT code reference guidance for this series.

Related CPT codes in the 17260-17286 series

CPT code 17264 is one of six codes covering malignant lesion destruction on the trunk, arms, or legs. Understanding where 17264 sits within the full series helps coders select the correct code when lesion size is close to a boundary. For related procedure families, see Pabau’s procedure code reference articles.

Dermatology and skin practice billing teams should note one pricing pattern. Face, eyelid, and nose codes (17280-17286) carry higher reimbursement rates than trunk or extremity codes for the same lesion size. This reflects the greater technical complexity of those anatomical sites.

How practice management software supports accurate 17264 billing

Claim denials for CPT code 17264 follow a predictable pattern: missing pathology documentation, mismatched lesion measurements, or unbundling errors flagged by NCCI edits. Each of these failures has a documentation root cause, and each can be addressed with an integrated clinical and billing workflow.

Pabau’s claims management software connects clinical notes, biopsy records, and billing codes in a single patient record. When a dermatologist documents a 3.5 cm malignant trunk lesion and the destruction method used, that information flows directly into the billing workflow. There’s no manual transcription, and no measurement data gets lost between the operative note and the claim. The result is cleaner first-pass claims for practices running high volumes of skin cancer procedures.

Skin clinic software built for procedure-heavy practices should handle the specific documentation requirements of the 17260-17286 series. That means structured fields for lesion site, pre-destruction diameter, destruction method, and pathology confirmation. When those fields are built into the clinical note template, the billing team gets what they need without chasing records. Practices managing digital medical forms across multiple providers benefit most from this kind of structured capture. It matters most when auditors ask for documentation across a batch of claims.

Practices wanting to reduce denial rates on integumentary procedures should review practice management software features that support pre-claim NCCI edit checking. Automated coding validation is a practical next step for teams handling high volumes of 17260-17286 series claims.

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Conclusion

CPT code 17264 applies only when three conditions line up. The diagnosis must be pathology-confirmed malignancy, the lesion must measure 3.1 to 4.0 cm at its widest point, and the site must be the trunk, arms, or legs. Get any one of those wrong and the claim moves to a different code or gets denied outright.

The coders who avoid denials on this code series treat measurement and pathology documentation as part of the procedure itself, not paperwork to finish afterward. That discipline matters more than knowing every modifier by heart.

Book a demo to see how Pabau keeps lesion measurements, pathology results, and billing codes connected in one record for your dermatology practice.

Continue your research

Need a structured approach to dermatology compliance? Medical spa compliance checklist walks through the documentation and regulatory requirements that apply to skin-based procedures.

Managing patient records across multiple skin procedures? Keeping client records current explains why structured, searchable records matter for both clinical safety and billing accuracy.

Looking for dermatology-specific EMR guidance? Dermatology EMR software covers the features that support integumentary procedure documentation and billing workflows.

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