Summary & Overview
CPT 97598: Additional Wound Debridement in Outpatient Rehabilitation
CPT code 97598 is a critical billing code in the management of complex wounds, representing the excision and debridement of each additional 20 cm² of wound surface area beyond the initial 20 cm² treated in a single session. This code is widely used in outpatient settings, particularly within physical medicine and rehabilitation, to ensure comprehensive wound care for patients with chronic or complicated wounds. The procedure encompasses topical applications, wound assessment, whirlpool therapy when performed, and patient instructions for ongoing care.
Nationally, 97598 is recognized by major payers including Aetna, Blue Cross Blue Shield, Cigna Health, Medicare, and UnitedHealthcare. Its use is essential for accurate billing and reimbursement in outpatient wound care management, supporting providers in delivering high-quality care to patients with significant wound needs.
Readers will gain insight into the clinical context of 97598, payer coverage details, and relevant policy updates. The publication also provides benchmarks for utilization and reimbursement, as well as an overview of related codes and modifiers. Understanding 97598 is important for professionals involved in wound care, billing, and healthcare policy, as it reflects current standards in active wound management and outpatient rehabilitation.
CPT Code Overview
CPT code 97598 is used in active wound care management to report the excision and debridement of each additional 20 cm², or part thereof, of total wound surface area beyond the first 20 cm² treated during the same session. This procedure includes topical application(s), wound assessment, whirlpool therapy when performed, and instructions for ongoing care. The service is typically provided in an outpatient setting, such as a hospital outpatient department, and falls under the Physical Medicine & Rehabilitation category.
Clinical & Coding Specifications
Clinical Context
A patient presents to an outpatient clinic with a chronic ulcer on the lower leg that has not healed despite previous treatments. The wound surface area exceeds 20 cm². During the visit, a physical therapist performs selective debridement to remove devitalized tissue from the wound. After completing the first 20 cm² (coded with 97597), the therapist continues debridement for each additional 20 cm² or part thereof, which is coded with 97598. The session includes wound assessment, topical applications, possible whirlpool therapy, and instructions for ongoing care. This service is typically provided in an outpatient hospital setting by physical therapists, physician assistants, or nurse practitioners.
Coding Specifications
- Modifier
-59: Used to indicate a distinct procedural service, such as when whirlpool therapy is provided to a different body part during the same encounter as wound debridement.
| Provider Taxonomy Code | Specialty Name |
|---|---|
225100000X | Physical Therapist |
363A00000X | Physician Assistant |
363L00000X | Nurse Practitioner |
- Physical Therapist: Specializes in rehabilitation and wound care management.
- Physician Assistant: Provides medical care under physician supervision, including wound care.
- Nurse Practitioner: Advanced practice nurse with expertise in wound management.
Related Diagnoses
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L97.909: Non-pressure chronic ulcer of unspecified part of unspecified lower leg- Relevant for patients with chronic ulcers requiring ongoing wound care and debridement.
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S81.009A: Unspecified open wound, unspecified knee, initial encounter- Applies to acute open wounds of the knee that may require debridement.
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T81.31XA: Disruption of external operation (surgical) wound, not elsewhere classified, initial encounter- Used for patients with post-surgical wound disruptions needing debridement.
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L89.309: Pressure ulcer of unspecified buttock, stage 3- Indicates a stage 3 pressure ulcer, which often requires active wound care management and debridement.
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L89.899: Pressure ulcer of other site, unspecified stage- Covers pressure ulcers at other sites and unspecified stages, relevant for wound care and debridement procedures.
Related CPT Codes
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97597: Removal of devitalized tissue from wound(s), selective debridement, without anesthesia (e.g., high‑pressure waterjet with/without suction, sharp selective debridement with scissors, scalpel and forceps), with or without topical application(s), wound assessment, and instruction(s) for ongoing care; first 20 cm² or less (active wound care management).- Used for the initial 20 cm² of wound debridement.
97598is reported for each additional 20 cm² or part thereof.
- Used for the initial 20 cm² of wound debridement.
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97602: Removal of devitalized tissue from wound(s), non‑selective debridement, without anesthesia (e.g., wet‑to‑moist dressings, enzymatic, abrasion), including topical application(s), wound assessment, and instruction(s) for ongoing care, per session.- Alternative to
97597/97598for non-selective debridement methods.
- Alternative to
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11042–11047: Debridement of relatively localized areas depending upon the involvement of contiguous underlying structures (deeper muscle/tissue).- Used when debridement involves deeper tissues such as muscle, fascia, or bone, rather than just skin or subcutaneous tissue.
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97597and97598are commonly used together in cases where wound surface area exceeds 20 cm².97602is an alternative for non-selective debridement.11042–11047are used when deeper structures are involved.
National Reimbursement Benchmarks
Medicare's national mean rate for CPT code 97598 is $49.27, which is higher than the BUCA (average commercial) mean rate of $43.53. Among commercial payers, UnitedHealth Group and Cigna have mean rates closest to Medicare, while Aetna's mean rate is the lowest at $41.13.
Rate dispersion, measured by the difference between the 75th and 25th percentiles, varies significantly across payers. Medicare exhibits the tightest range at $5.00, indicating consistent reimbursement rates. In contrast, Cigna shows the widest dispersion at $38.00, reflecting greater variability in rates. Other commercial payers such as Blue Cross Blue Shield and UnitedHealth Group have moderate ranges of $20.39 and $21.33, respectively.
The table and chart below present a detailed breakdown of national benchmarks for CPT code 97598 across major payers.
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