CPT 97602: Billing Non-Selective Debridement Correctly

CPT 97602 is the code most mobile wound care practices bill the least — and understand the least. That's a problem, because it covers a broad swath of day-to-day wound management: autolytic debridement with hydrogels and hydrocolloids, enzymatic treatment with collagenase, and traditional wet-to-moist mechanical debridement. When clinicians can't confidently justify and document non-selective debridement, they either undercode or get denied. This guide breaks down exactly what CPT 97602 covers, when Medicare pays for it, and how to document it so it survives audit scrutiny.

What CPT 97602 Actually Covers

CPT 97602 is defined as: Non-selective debridement without anesthesia (not including burn debridement), not described elsewhere; wet dressings and/or mechanical or chemical removal of all tissue, per treatment area.

"All tissue" is the operative phrase. Unlike CPT 97597 (selective debridement), 97602 removes viable and non-viable tissue together — the approach does not discriminate by tissue type. Methods that fall under this code include:

Autolytic debridement: moisture-retentive dressings (hydrogels, hydrocolloids, transparent films) that use the wound's own enzymes to break down devitalized tissue over time
Enzymatic debridement: application of a prescription enzymatic agent such as collagenase (Santyl) that chemically digests non-viable tissue
Wet-to-moist mechanical debridement: saline-moistened gauze dressings applied wet, allowed to dry partially, and removed — taking both necrotic and viable tissue in the process (note: CMS has scrutinized this method closely)
Pulsatile lavage: high-pressure irrigation used to remove loose tissue and debris when performed as the primary debridement method

CPT 97602 is billed per treatment area, not per square centimeter. One code = one anatomically distinct wound per session, regardless of wound size. If you treat the right heel and the left lateral ankle in the same visit, you bill 97602 twice — once per wound.

How 97602 Differs from 97597 and 97598

This distinction matters for both compliance and reimbursement. CPT 97597 (selective debridement, first 20 sq cm) and 97598 (each additional 20 sq cm add-on) require the physical removal of only dead tissue using sharp instruments, laser, or hydrosurgery. The clinician must be capable of differentiating viable from non-viable tissue in real time, and the documentation must reflect that distinction.

CPT 97602 cannot be billed on the same day as 97597 or 97598 on the same wound. National Correct Coding Initiative (NCCI) edits prohibit this combination. If you apply enzymatic agent to wound A and perform sharp selective debridement on wound B during the same visit, you bill 97602 for wound A and 97597/97598 for wound B — different anatomical sites, no NCCI conflict.

Medicare LCD Requirements for Coverage

Medicare Administrative Contractors (MACs) govern local coverage for CPT 97602 through Local Coverage Determinations for chronic wound care and debridement. Most LCDs require that a wound meet all of the following before non-selective debridement is covered:

Wound is present and active — not a healed or scarred area
Non-viable tissue is documented — slough, eschar, fibrinous exudate, or necrotic debris must be identified in the clinical record
Conservative care has been attempted — routine dressing changes and offloading must be documented before debridement is warranted
Medical necessity is established — the treating clinician must document why debridement is necessary to advance wound healing

The 4-week rule (also called the 30-day rule) still applies: for skin substitute applications that may follow a debridement phase, practitioners must document that wounds have failed to achieve 50% closure over 30 days with standard care. That 30-day documentation window often begins with visits that include CPT 97602, making those early debridement notes critical to later skin substitute reimbursement.

For a full breakdown of what your MAC requires, see our guide on wound care LCD compliance, which maps the key LCDs by MAC jurisdiction.

Documentation Requirements for CPT 97602

This is where most denials originate. Each 97602 claim needs to be supported by documentation that answers five questions:

1. What was the wound's status at the time of the visit? Record wound dimensions (length × width × depth in centimeters), location (using anatomical landmarks), tissue types present (percentage of slough vs. granulation vs. eschar), exudate character and volume, wound edges, and periwound skin condition.

2. What type of non-selective debridement was performed? Identify the method specifically: enzymatic (name the agent and concentration), autolytic (name the dressing product), or wet-to-moist mechanical (specify the solution used). Vague entries like "debridement performed" will not pass a Targeted Probe and Educate (TPE) review.

3. Why was selective debridement not appropriate? You are not required to justify choosing 97602 over 97597 in every note, but if a patient has been receiving enzymatic debridement for several weeks without sharp debridement, some reviewers expect a clinical rationale. Phrases like "wound bed friable, enzymatic approach selected to minimize bleeding risk" or "patient on anticoagulation, sharp debridement deferred" add meaningful context.

4. What was the patient's response? Document tolerance of the procedure, any pain reported, hemostasis if relevant, and patient or caregiver instruction provided.

5. What is the plan? Next visit interval, dressing type, and any referrals or escalation triggers should appear in every note. An uninterrupted series of 97602 claims with no documented progression or escalation plan raises red flags for payers.

### Documenting Enzymatic Debridement Specifically

Collagenase (Santyl) and similar enzymatic agents require a prescription, and that prescription should be in the chart. Document that you or the prescribing provider ordered the agent, that the appropriate dressing protocol was followed (moisture-retentive cover dressing over the enzyme), and that metal-containing topical agents were avoided (they inactivate collagenase). If a caregiver is applying the agent between visits, document caregiver training.

Common Denial Triggers and How to Avoid Them

Unbundling with E/M codes on the same day: If you bill an E/M code (99213, 99214, etc.) and 97602 on the same visit, you need modifier -25 appended to the E/M code to document that a separate, significant evaluation was performed. Missing modifier -25 is one of the top reasons 97602 claims get bundled and denied.

Place of service mismatch: If you treat a patient in an SNF and bill POS 31 (Skilled Nursing Facility), ensure that the patient is on Part B, not under a Part A SNF stay. During an active Part A SNF stay, wound care is bundled into the SNF consolidated billing rate — you cannot bill 97602 separately unless you are the facility's contracted wound care provider. See our complete wound care debridement billing guide for place-of-service rules by setting.

Missing wound measurements: CMS auditors consistently flag debridement claims where wound dimensions are absent. Wound size is not optional documentation — it is a medical necessity element.

Frequency without documented medical necessity: Billing 97602 at every visit for months without documentation of progress (or lack thereof, with a plan adjustment) invites scrutiny. If a wound is not responding to non-selective debridement, the chart should reflect that you reassessed the approach — whether that means escalating to selective debridement, biopsying the wound edge, or ordering vascular studies.

Same-day 97602 and 97597 on the same wound: As noted above, this is an NCCI edit. If you perform both selective and non-selective debridement on the same anatomical wound in one visit, bill the selective code (97597/97598) only — it represents the higher-complexity intervention.

Reimbursement and Revenue Considerations

CPT 97602 reimburses modestly. Under the 2026 Medicare Physician Fee Schedule, non-facility reimbursement for 97602 is approximately $30–38 per treatment area depending on geographic locality. This is lower than 97597 (approximately $85–95 per area) because the code does not require the clinical selectivity and skill level that sharp debridement demands.

That said, 97602 is billable across a wide range of settings — office (POS 11), home (POS 12), SNF Part B (POS 31), and assisted living (POS 13 or 15 depending on arrangement). The volume opportunity across a multi-facility mobile practice can make the aggregate revenue meaningful.

When you're building a wound care revenue model, it helps to think of 97602 as an early-phase code — often used in the first 2–4 weeks of a wound care episode before the wound is clean enough to consider advanced therapies. Pair it correctly with the right E/M code and modifier -25, and it captures real value for the work you're already doing.

For a complete picture of how debridement fits into your revenue model, see our guide to wound care CPT codes for 2026, which covers the full debridement hierarchy alongside E/M, skin substitute, and NPWT codes.

Key Takeaways

CPT 97602 covers autolytic, enzymatic, and wet-to-moist mechanical debridement — any non-selective method that removes all tissue types together, not just necrotic tissue
Bill per treatment area, not per square centimeter; multiple wounds in one visit = multiple 97602 units
NCCI edits prohibit billing 97602 and 97597/97598 on the same wound on the same day — bill the selective code if both were performed
Documentation must include wound dimensions, tissue types present, debridement method (including product name), patient response, and plan
Modifier -25 is required on same-day E/M codes; without it, the E/M gets bundled into the procedure code
Enzymatic debridement notes should reference the prescription, the product, and proper application protocol to survive audit review