Summary & Overview
CPT 97598: Selective Excision of Devitalized Tissue, Additional 20 cm2
CPT code 97598 represents selective excision of devitalized tissue from an open wound for each additional 20 cm² (or part thereof) after the first 20 cm² is treated. This code captures incremental wound care work in settings where clinicians perform sharp or high‑pressure waterjet debridement during the same encounter. Nationally, accurate use of the code matters for clinical documentation, resource allocation in outpatient wound programs, and consistent billing for incremental wound surface area.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, and Medicare. Readers will find an explanation of the code’s clinical scope and typical sites of service, comparisons to related wound debridement codes, and the common billing contexts in which the code is applied. The publication outlines benchmarks and coding relationships relevant to CPT 97598, clarifies when it is used relative to the initial debridement code, and summarizes the clinical activities it covers (sharp debridement, waterjet techniques, topical care, wound assessment, and patient instructions).
This national overview is intended for clinicians, practice managers, and coding professionals seeking concise guidance on the clinical meaning and billing context of CPT 97598, including how it fits into active wound care workflows and code groupings used for debridement services.
Billing Code Overview
CPT code 97598 describes the selective excision of devitalized (dead) tissue from an open wound for each additional 20 cm² or part thereof after the initial 20 cm² has been debrided at the same encounter. The procedure may use sharp instruments (scissors, forceps, scalpel), a high‑pressure waterjet with or without suction, or other selective techniques. Treatment can include removal of deep or superficial tissue layers, blood clots, debris, or biofilm adhered to wound tissues. The service may also include topical application of medication or materials, wound assessment, whirlpool when performed, and instructions for ongoing care.
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Service type: Selective wound debridement (additional 20 cm² increments)
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Typical site of service: Outpatient wound care clinics, physician offices, ambulatory surgery centers, hospital outpatient departments, and other outpatient settings
Clinical & Coding Specifications
Clinical Context
A 68-year-old male with peripheral arterial disease and diabetes presents to a wound care clinic for follow-up of a chronic non‑healing ulcer on the lower leg. On exam the primary wound measures 45 cm² with a central area of black devitalized tissue and adherent biofilm. After completing the initial selective debridement of the first 20 cm² using sharp technique and high‑pressure irrigation, the provider performs additional selective excision of devitalized tissue for the remaining wound surface during the same encounter. The procedure includes wound assessment, irrigation with saline, removal of slough and fibrin, application of a topical antimicrobial, and verbal and written wound care instructions. The encounter occurs in an outpatient wound care clinic; documentation includes total measured wound surface area, technique used for each segment debrided, level of pain control or local anesthesia if provided, and post‑procedure dressing and follow‑up plan. Billing uses 97598 for each additional 20 cm² or part thereof beyond the first 20 cm² billed with 97597.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management (E/M) service by the same physician on the same day | Use when a distinct E/M visit is provided in addition to the debridement procedure |