Let’s be real for a moment. You are staring at a patient’s chart. The wound needs a fresh dressing. The nurse spent twenty minutes cleaning the area and applying new gauze. Now you have to bill for it. But which code do you choose?
The world of wound care coding can feel like a maze. Many people assume a dressing change is just a dressing change. In reality, payers care about why you changed the dressing, how much work was involved, and who performed it.
This guide walks you through everything you need to know about the CPT code for dressing change. We will cover simple surface applications, complex negative pressure therapy, and everything in between. By the end, you will feel confident choosing the right code for every scenario.
Understanding the Basics of Wound Care Coding
Before we jump into specific numbers, we need to understand a core concept. In medical coding, you rarely bill for just “changing a bandage.” The code depends on the nature of the wound and the level of skill required.
There are three main categories for dressing changes:
- Simple: No active cleansing or debridement. Just a fresh cover.
- Intermediate: Requires cleaning, perhaps soaking, or using a topical ointment.
- Complex: Involves debridement (removal of dead tissue) or advanced therapies.
Each category has different rules. Also, remember the “Global Surgical Package.” If a surgeon performed a procedure ten days ago, the post-op dressing changes are usually included. You cannot bill separately. We will talk more about that trap later.
The Core Codes for Dressing Changes (No Debridement)
Let’s look at the most common scenarios. When a provider simply removes the old gauze and puts on a new one, you need specific codes.
Simple Dressing Change (CPT 97597? No – Think Differently)
Here is a common point of confusion. Many people search for a “simple dressing” code. The truth is, there is no standalone CPT code for a routine simple dressing change performed by a nurse in a clinic if there is no active wound assessment.
Wait, let me clarify.
If a patient arrives, you lift the tape, look at the skin (but do not clean it aggressively), and put on a new adhesive strip—this is often bundled into an Evaluation and Management (E/M) visit. You cannot bill separately for the tape.
However, there is an exception. When the dressing change is the only service provided, and it requires the skill of a nurse or therapist, you might use CPT 97602 (Removal of devitalized tissue from wound(s), non-selective debridement, without anesthesia). But note: 97602 is not just a dressing change. It involves wiping or irrigating away loose debris.
For a true, active wound care management without debridement, you look at CPT 97597 and 97598 (Debridement codes), but again, those require removal of tissue.
The reality: For a pure dressing change (no cleaning, no debridement), you rarely bill a separate CPT code. You bill the visit level (e.g., 99212 or 99213) that includes the medical decision making. If a separate identifiable service exists, documentation is critical.
Intermediate Dressing Change (With Cleaning)
This is where therapists and nurses get paid properly. An intermediate dressing change usually includes:
- Removing the old dressing.
- Irrigating the wound with saline.
- Applying a new, sterile dressing.
- Maybe applying a simple gauze or foam pad.
In this case, coders typically turn to CPT 97597 for the first 20 square centimeters, but only if there is non-selective debridement (wiping off loose slough). If there is no debridement at all, you cannot use 97597.
So what do you use? You use the unlisted wound care code CPT 97600? No. That is old.
Honestly, for a dressing change with cleaning but no tissue removal, many payers expect you to bundle the service into the E/M code. But if you are a physical therapist or a wound clinic billing for the procedure alone, you might use CPT 97605 (Negative pressure therapy) or CPT 97606 (Negative pressure therapy, durable medical equipment) – but those are specific to pumps.
Let me give you a better path. For a dressing change that includes manual cleansing and application of a simple dressing, and you are in a skilled nursing facility or home health, you often bill under the routine nursing services (not CPT). In outpatient therapy, you look for active wound care management.
To simplify: CPT 97597 is your friend when you physically remove non-viable tissue. If you are just cleaning, you are not using a specific dressing change code. You are using a medical decision making code.
Detailed Look at Active Wound Care Management Codes
Let’s focus on the codes that do pay for dressing-related work. These are the workhorses of wound clinics.
CPT 97597: Debridement (First 20 sq cm)
This is the code many people confuse with a dressing change. CPT 97597 describes selective or non-selective debridement of a wound. It includes the removal of:
- Slough
- Necrotic tissue
- Foreign material
And yes, it also includes the dressing change that follows. The dressing is part of the procedure.
- What it is: Active removal of dead tissue plus applying a dressing.
- When to use: The wound has yellow slough or black eschar. You scrub, pick, or cut it away. Then you add a dressing.
- Time: Not time-based. Based on surface area.
- Reimbursement: Higher than a simple change.
CPT 97598: Debridement (Each additional 20 sq cm)
Use this for any area beyond the first 20 square centimeters. You use it in conjunction with 97597.
- Example: A wound measures 45 sq cm. You bill 97597 for the first 20, then 97598 for the next 20, and then CPT 97598 again for the remaining 5 sq cm? No – you only bill additional units for each full 20 sq cm. The remaining 5 is not billed separately.
CPT 97602: Non-Selective Debridement (Wiping)
This is the closest to a true “dressing change with cleaning.” CPT 97602 is for removal of devitalized tissue using non-selective methods (like a wet-to-dry dressing, irrigation, or wiping). No sharp instruments. No scalpel.
This code is often used by physical therapists and wound nurses.
- Includes: Soaking, gentle irrigation to loosen debris, wiping away loose material, and applying a new dressing.
- Excludes: Sharp debridement (that’s 97597).
- Payer caution: Many commercial insurers do not pay for 97602. Always check. Medicare does cover it under specific circumstances.
Comparison Table: 97597 vs 97602 vs Dressing Alone
| Feature | Simple Dressing Change (No Code) | CPT 97602 | CPT 97597 |
|---|---|---|---|
| Debridement | None | Non-selective (wetting, wiping) | Selective or non-selective (sharp, scrubbing) |
| Cleaning | No | Yes, irrigation | Yes, aggressive |
| Tissue removed | No | Loose slough only | Firm slough, eschar, necrotic tissue |
| Dressing application | Yes | Yes | Yes |
| Separate reimbursement | Rarely | Often, but verify payer | Yes, widely accepted |
Negative Pressure Wound Therapy (NPWT) Dressing Changes
Now we enter a specialized area. Negative Pressure Wound Therapy (NPWT) uses a vacuum pump to pull fluid from a wound. Changing these dressings is not simple.
CPT 97605 and 97606
These codes are for the dressing change of a negative pressure system.
- CPT 97605: NPWT, applying a durable medical equipment (DME) pump, first 100 sq cm of wound surface area. Includes the dressing change, pump application, and removal.
- CPT 97606: NPWT, for wounds greater than 100 sq cm.
Important note: These codes are for the application and management of the pump. They are not for the initial placement of the system in the operating room. They are for subsequent changes in the clinic or at home.
A typical NPWT dressing change includes:
- Removing the old foam.
- Cleaning the wound bed.
- Cutting new foam to fit the wound.
- Placing the foam.
- Applying the transparent drape.
- Connecting the tubing to the pump.
- Setting the pressure (typically -125 mmHg).
This takes 15 to 30 minutes. You bill 97605 or 97606 for each session. Do not also bill a separate debridement code (97597) on the same day unless you document that you performed a distinct, separate debridement before starting the NPWT change.
Reference Table: NPWT Dressing Change Codes
| CPT Code | Description | Wound Size | Typical Units per Session |
|---|---|---|---|
| 97605 | NPWT, DME pump, including dressing change | First 100 sq cm | 1 unit |
| 97606 | NPWT, DME pump, including dressing change | Greater than 100 sq cm | 1 unit |
| 97607 | NPWT, disposable pump (e.g., PICO), first 50 sq cm | First 50 sq cm | 1 unit |
| 97608 | NPWT, disposable pump | Each additional 50 sq cm after first | As needed |
How to Bill Dressing Changes in Different Settings
The location changes everything. A dressing change in a hospital is different from a dressing change in a doctor’s office.
In a Physician Office or Outpatient Clinic
If the patient comes for a scheduled visit and the only reason is a dressing change:
- With E/M service: If the doctor also examines the patient, manages medications, or changes the plan of care, you bill the E/M code (e.g., 99213) plus the wound care code (97597) with modifier -25 (significant, separately identifiable service).
- Without E/M service (nurse does it): You may bill 97602 (if appropriate) or 97597. Many offices bill a low-level E/M code (99211) for a nurse visit that includes a simple dressing change. Check your payer.
In a Skilled Nursing Facility (SNF)
For Medicare Part A patients (covered stay), dressing changes are part of the bundled Per Diem payment. You cannot bill separately. For Medicare Part B patients (outpatient), you can bill 97597 or 97602 using the therapy or wound care benefit.
In Home Health
Home health agencies bill under the Home Health Prospective Payment System (HH PPS). Dressing changes are part of the 30-day episode. You do not bill individual CPT codes for each visit. You bill a 30-day period code (like G0299 for nursing visits) or the OASIS assessment. This is a major difference.
Reader Note: If you work in home health, do not use 97597 per visit. You will get denials. Use the home health visit codes (G0151 for PT, G0154 for RN, etc.) or the episode code.
The Global Surgical Period Trap
This is the number one reason for denied claims. Surgeons have a global period.
- 0-day global: Minor procedures. You cannot bill any related E/M or dressing changes on the day of the procedure. After that day, you can bill.
- 10-day global: Most minor surgeries. You cannot bill for any dressing changes related to the surgery for 10 days post-op.
- 90-day global: Major surgeries. You cannot bill for any dressing changes related to the surgery for 90 days.
Example: A patient has an excision of a skin lesion (CPT 11400) with a 10-day global. You change the dressing on day 3. You cannot bill a separate dressing change code. It is part of the surgical package. If the wound becomes infected and you need to debride it on day 12, you can bill 97597 because it is a new problem.
Always ask: “Is this dressing change related to a surgery I performed within the global period?” If yes, do not bill separately.
Modifiers You Must Know for Dressing Change Codes
Modifiers tell the payer, “This was different.” Use them correctly.
- Modifier -25 (Significant, separately identifiable E/M service): Append this to the E/M code (not the wound code). Example: The doctor evaluates a diabetic ulcer (99213-25) and then performs a sharp debridement (97597). The dressing change is included in 97597.
- Modifier -59 (Distinct procedural service): Append this to the wound code (97597) when you perform it on a different site or at a different session than another procedure on the same day.
- Modifier -RT and -LT (Right and Left): Use these if you change dressings on bilateral wounds but the code is bilateral by default? 97597 is not bilateral. Use RT/LT for different locations.
- Modifier -76 (Repeat procedure by same physician): You change the same dressing on the same wound again later the same day (rare, but happens in burns). Use -76.
Real-World Coding Scenarios
Let’s put theory into practice. Read these cases.
Scenario 1: The Routine Post-Op Check
Case: A patient is 5 days post-carpal tunnel release (suture removal not due yet). The nurse removes the gauze, sees a clean incision, applies a new bandage. No cleaning, no removal of scabs.
Correct coding: No separate CPT code. The service is included in the surgical global period. Bill nothing for the dressing change. The office visit (if scheduled) is part of the global package.
Scenario 2: The Chronic Venous Ulcer
Case: A patient has a 15 sq cm venous ulcer on the left leg. The wound is covered in yellow fibrinous slough. The nurse uses a wet gauze to gently scrub away the loose slough, irrigates with saline, and applies a foam dressing.
Correct coding: CPT 97602 (non-selective debridement). Because the nurse did not use a sharp instrument. If the nurse had used a curette or scissors, it would be 97597.
Scenario 3: The Diabetic Foot Ulcer with Sharp Debridement
Case: A podiatrist sees a diabetic foot ulcer measuring 8 sq cm. The wound has callused edges and dark eschar. The doctor uses a scalpel and forceps to remove the eschar and cut away callus. Then he applies an iodine dressing.
Correct coding: CPT 97597 (first 20 sq cm). The dressing change is included. Do not bill separately for the dressing.
Scenario 4: The NPWT Change
Case: A patient comes to the wound clinic for a scheduled NPWT dressing change on a 40 sq cm abdominal wound. The nurse removes the old foam, irrigates, cuts new foam, applies a new drape, and reconnects the V.A.C. pump.
Correct coding: CPT 97605 (NPWT, first 100 sq cm). One unit.
Scenario 5: The “Look and See” Simple Change
Case: A patient walks into a family practice. She has a small cut on her finger from a paper cut. She wants a new Band-Aid. The medical assistant puts on a fresh adhesive bandage. No irrigation. No medication.
Correct coding: Bill an office visit only if the patient was seen for another reason. For the Band-Aid alone? No billable CPT code. You could bill a nominal supply code (A4450 for tape) but not a procedure code.
Documentation Requirements for Dressing Changes
You cannot get paid without good notes. Payers look for these items.
For 97597 or 97598 (Sharp Debridement):
- Size of the wound before debridement (length x width x depth).
- Description of the tissue removed (eschar, slough, necrotic fat).
- Instrument used (scalpel, scissors, curette).
- Appearance after debridement (bleeding, clean, pink).
- Dressing applied (type and quantity).
For 97602 (Non-Selective Debridement):
- Size of the wound.
- “Gently wiped” or “irrigated with saline” – use these exact phrases.
- “Removed loose, non-viable tissue” – do not say “dressing change.”
- Dressing applied.
For 97605/97606 (NPWT Change):
- Current wound size.
- Foam type (black, white, silver).
- Pressure setting.
- Drainage amount and color.
- Integrity of the seal.
- Dressing change date and time (if timed).
Pro tip: Never write “dressing change” in the procedure description for 97597. Write “sharp debridement.” The dressing is incidental. This small change prevents denials.
Common Denials and How to Avoid Them
Let me save you time. These are the top reasons payers reject dressing change claims.
- “Service is included in global surgical period.” Solution: Check the date of the last surgery. If within 10 or 90 days, do not bill. Use modifier -79 for unrelated procedures.
- “Coding was not specific.” Solution: Never use an unlisted code (e.g., 97600 is old and invalid). Use 97597, 97602, or 97605.
- “Medical necessity not established.” Solution: Document why the wound needed active debridement. “To remove biofilm and promote granulation” is good. “To change bandage” is bad.
- “Frequency exceeds medical necessity.” Solution: For 97597, most payers allow once every 3 to 7 days. For NPWT changes, every 48 hours is standard. Daily sharp debridement is rarely necessary. If you do more, write a compelling note explaining why.
Medicare Coverage Guidelines for Dressing Changes
Medicare has specific rules. They cover wound care under the “Wound Care and Debridement” Local Coverage Determinations (LCDs).
Medicare covers 97597 when:
- The wound has necrotic tissue or slough.
- The debridement is necessary to allow healing.
- It is performed by a qualified provider (MD, DO, NP, PA, PT, OT – yes, physical therapists can do this under Medicare Part B with specific training).
Medicare does NOT cover 97597 for:
- Routine dressing changes.
- Wet-to-dry dressings used solely for mechanical debridement (they consider this 97602).
- Wounds with only serous drainage and no necrotic tissue.
Medicare covers 97602 only under the therapy benefit (outpatient physical therapy or occupational therapy). A nurse cannot bill 97602 to Medicare Part B in a doctor’s office without special enrollment.
Always read your local MAC’s LCD. For example, Novitas Solutions and First Coast Service Options have different rules for 97602 frequency.
The Role of Physical Therapists and Occupational Therapists in Dressing Changes
This is a growth area. PTs and OTs often perform wound care in outpatient clinics, SNFs, and home health.
What PTs/OTs can bill:
- 97597 and 97598: Yes, if they have training in sharp debridement and state law allows. Many states require a certification or advanced competency.
- 97602: Yes, for non-selective debridement. This is very common.
- 97605 and 97606: Yes, but they need to document the pump management as skilled therapy.
What PTs/OTs cannot bill:
- An E/M code (99211, 99213) – that is for physicians.
- A simple dressing change with no debridement – that is not skilled therapy. A nurse aide could do it.
If you are a PT, focus on the word “skilled.” Changing a clean dressing is not skilled. Removing necrotic tissue to prevent infection is skilled.
Pricing and Reimbursement Expectations
Let’s talk money. Reimbursement varies wildly by payer and region. These are rough Medicare 2025 facility rates (non-facility, office setting, approximate). Do not take these as guaranteed.
Commercial insurers often pay 150% to 300% of Medicare rates. However, many commercial plans require prior authorization for 97597 or 97605.
Important: Never bill 97597 and 97602 for the same wound on the same day. They are mutually exclusive. Choose one or the other based on the method.
Frequently Asked Questions (FAQ)
1. Can I bill for a simple dressing change without any debridement?
Generally, no. Routine dressing changes are considered part of a visit or global surgical package. The only exception is in home health or SNF where you bill a visit code, not a wound-specific CPT.
2. What is the CPT code for dressing change for a burn?
Burns often use CPT 16000 (initial burn dressing change, small) or CPT 16020-16030 for debridement and dressing of partial thickness burns. Do not use 97597 for burns if the burn codes are more specific.
3. Is there a timed code for dressing changes?
No. 97597 is based on surface area. 97602 is based on the procedure, not time. However, some payers accept CPT 97140 (manual therapy) for wound massage, but that is not a dressing change. Do not confuse them.
4. Can a medical assistant (MA) bill a dressing change under a doctor’s supervision?
Yes, under the physician’s NPI using incident-to billing. You bill the service as if the doctor performed it. But the MA cannot perform sharp debridement (97597) in most states. Only a nurse or therapist can do 97602.
5. What is the difference between CPT 97602 and CPT 97597?
97602 is non-selective (wiping, irrigation). No sharp instruments. 97597 is selective or non-selective using sharp instruments (scalpel, scissors) to cut tissue. 97597 pays more because it is higher skill.
6. How often can I bill 97597 for the same wound?
Medicare usually allows once every 3 to 7 days. For a very necrotic wound, daily might be allowed but you must document “daily debridement required due to rapid re-accumulation of slough.”
7. Do I need to use a modifier if I do a dressing change and an E/M visit on the same day?
Yes. Append modifier -25 to the E/M code (e.g., 99213-25). Do not attach modifier -25 to the wound code (97597).
8. What is the CPT code for a wet-to-dry dressing change?
That is CPT 97602. A wet-to-dry dressing is a classic example of non-selective debridement. When you remove the dry gauze, it pulls off loose debris.
Final Checklist Before You Submit Your Claim
Use this list to catch errors before they cost you money.
- Is the dressing change related to a surgery within the global period? If yes, stop. Do not bill.
- Did you remove any tissue (slough, eschar)? If no, you probably cannot use 97597 or 97602.
- Did you use a scalpel or scissors? Use 97597. Did you use gauze and saline only? Use 97602.
- Is the wound size documented in square centimeters? (Length x Width. For depth, not needed for the code but good for medical necessity).
- Did you include a separate dressing code? Do not. The dressing is included in 97597, 97602, and 97605.
- For NPWT: Did you use a disposable pump or a rental DME pump? Use 97607/97608 for disposable (e.g., PICO, PREVENA). Use 97605/97606 for rental (e.g., V.A.C., Vivano).
- Did you check your local payer? Commercial insurers may have a different list of covered codes.
Additional Resources for Wound Care Coders
You do not have to memorize all of this. Keep these resources handy.
- The American Academy of Professional Coders (AAPC) – Wound Care Coding Guide: Monthly updates on LCD changes.
- The Wound, Ostomy, and Continence Nurses Society (WOCN) – Coding Fact Sheets: Free for members.
- Medicare LCD Database (search “Wound Care”): Enter your state and read the local coverage determination. This is the most reliable source.
[Link to Medicare Wound Care LCD Search Tool] (Example: Use the cms.gov Medicare Coverage Database)
Conclusion
In three lines: The correct CPT code for a dressing change depends entirely on whether you remove tissue. Use 97597 for sharp debridement of the first 20 sq cm, 97602 for non-selective wiping, and 97605 for negative pressure therapy dressing changes. Routine, simple dressing changes without debridement are often not billable separately and are bundled into E/M visits or global surgical packages.
