Summary & Overview

CPT 0658T: Electrical Impedance Skin Lesion Assessment for Melanoma Risk

CPT code 0658T represents a noninvasive diagnostic procedure that applies electrical signals through one or more skin lesions and uses algorithmic analysis of the electrical response to generate a melanoma risk score. This code captures a novel, device-based approach to skin cancer risk stratification that can influence diagnostic pathways, biopsy decisions, and dermatology practice workflows. Nationally, adoption of such codes matters because they affect coverage policy development, clinical integration of emerging diagnostics, and claims processing standards.

Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical utility of the procedure, typical sites of service, and the policy dimensions that payers consider when evaluating coverage for device-based melanoma risk assessments. The publication summarizes available benchmarks and payer coverage considerations, highlights common billing and coding contexts for use in outpatient dermatology, and outlines the clinical context in which a melanoma risk score from electrical impedance analysis is generated.

Content covers what payers typically evaluate for novel diagnostic codes, implications for outpatient dermatology workflows, and where readers can expect policy updates or coverage variability across national payers. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare0658TCPTdermatologymelanoma riskdiagnostic deviceelectrical impedanceskin lesion assessmentoutpatient

Billing Code Overview

CPT code 0658T describes a diagnostic skin lesion assessment in which the provider applies an electrical signal through one or more skin lesions at varying frequencies and depths. The device records electrical responses and uses an algorithm to classify lesions and calculate a melanoma risk score based on the measured data.

Service type: Noninvasive diagnostic lesion assessment using an electrical impedance-based device with algorithmic analysis
Typical site of service: Dermatology clinic or outpatient procedure setting where skin lesion evaluation and noninvasive diagnostic devices are used

Clinical & Coding Specifications

Clinical Context

A 52-year-old patient presents to a dermatology clinic with one or more pigmented skin lesions of concern identified on clinical exam or dermoscopy. The provider discusses noninvasive lesion assessment using an electrical impedance device that applies varying electrical frequencies and depths through the lesion, records impedance signatures, and uses an algorithm to calculate a melanoma risk score. The typical clinical workflow: the provider documents history and focused skin exam, photographs the lesion(s), cleans the skin, aligns the device to the lesion, performs the impedance assessment which takes minutes per lesion, reviews the computed melanoma risk score, and integrates the result with clinical and dermoscopic findings to determine next steps (conservative monitoring with photography and follow-up, shave or excisional biopsy, or referral to surgical dermatology). Typical site of service is an outpatient dermatology clinic or office-based procedure room. Common patient scenarios include evaluation of a solitary atypical pigmented lesion, multiple suspicious nevi in a surveillance patient with history of prior melanoma, or triage of lesions in primary care for dermatology referral.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when documentation supports substantially greater work than typical for the service (e.g., extended assessment or multiple problematic lesions requiring extra time).

Taxonomy Code	Specialty	Notes
`207K00000X`	Dermatology	Most common specialty performing office-based lesion assessment.
`207NP2300X`	Dermatopathology	Involved downstream if biopsy specimens are submitted for histologic diagnosis.
`208000000X`	Family Medicine	May perform initial screening and refer or perform point-of-care testing in primary care settings.
`207L00000X`	Plastic Surgery	May be involved when lesions are referred for surgical excision or reconstruction.

ICD-10 Code	Description	Clinical Relevance
`D22.9`	Melanocytic nevi, unspecified	Represents common nevi evaluated with noninvasive testing to assess atypia.
`D03.9`	Melanoma in situ, unspecified	Used when suspicious lesions warrant assessment to triage for biopsy to rule out in situ melanoma.
`C43.9`	Malignant melanoma of skin, unspecified	Relevant in patients with prior melanoma history or high-risk findings where rapid assessment guides management.
`L82.2`	Lentigo maligna	Pigmented lesion subtype commonly assessed for malignant transformation.
`R23.0`	Abnormality of skin texture	Non-specific code that may be used when lesion appearance is atypical prompting assessment.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`11102`	Tangential biopsy of skin (e.g., shave); single lesion	Performed when the impedance test indicates need for tissue diagnosis and a shave biopsy is appropriate.
`11104`	Tangential biopsy of skin; each additional lesion (list separately in addition to code for primary procedure)	Billed when multiple lesions are biopsied after assessment.
`11600`	Excision, benign lesion including margins; up to 0.5 cm	Used when definitive removal of a suspicious lesion is indicated following risk assessment.
`88305`	Level IV surgical pathology, gross and microscopic examination	Billed by the laboratory for histopathologic analysis of biopsy tissue obtained after the assessment.
`99213`	Office or other outpatient visit for evaluation and management, established patient, moderate complexity	Typical E/M visit for evaluation, ordering, and discussing the impedance assessment and results.
`96999`	Unlisted dermatologic procedure (if required by payer for device-specific reporting)	Occasionally used when payers require an unlisted code in absence of a specific device code; check payer guidance.

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