Wound Care Underpayments and Charge Capture: How Practices Recover Lost Revenue

Wound care practices lose revenue in three places: the charge never makes it to the claim, the claim isn’t coded properly, and the payer doesn’t pay what the contract requires. Each one looks small on a single claim. Together, they are the usual source of wound care underpayment.

This guide highlights the typical underpayment scenarios, as well as the codes involved: CPT 97597 and CPT 97598forf selective debridement, as well as the codes CPT 15271 to 15278 for skin substitute application. Additionally, payer contract checks, charge capture checklist, and FQHC billing requirements are covered. Use it with our wound care billing services page if you want a team to run these checks for you.

Key Takeaways

Where Wound Care Practices Lose Revenue

Intellicure, a wound care software vendor, lists the causes below. They are vendor-reported, but each one is easy to test in your own claims.

Common Wound Care Underpayment Patterns

Pattern	What it looks like	Where to check
Undercoded visits	E/M codes default to mid-level even when the encounter was more complex	A sample of E/M levels against the notes
Missing or wrong modifiers	Modifiers are left off or misapplied for multiple, bilateral, all, or assistant procedures	Remittance adjustments on procedure lines
Thin debridement notes	Method, tissue type, extent, or rationale is missing, so the claim is downcoded or denied	Debridement notes against the billed code
Product and quantity mismatches	The billed product, HCPCS code, or quantity does not match the chart or the wound size	Supply orders, product logs, and the claim
Payer differences	MAC policies and commercial criteria differ and are not tracked	Payer policy files by plan

Unsigned supply orders and missing attestations represent recoupment risk according to the aforementioned source. Denial rates that seem acceptable in isolation may still lag your peers.

CPT 97597 and 97598: Selective Debridement

What the Codes Cover

CPT 97597 describes selective debridement of an open wound that is the size of 20 square cm or less. CPT 97598 applies to each subsequent 20 square cm of wound area and cannot be billed independently. CPT 97597 must be billed in conjunction with CPT 97598. A unit is considered a full unit no matter how much surface of the wound has been treated, so a wound that is 20.3 sq cm in size will qualify for 97597 and one unit of 97598. 

Surgical debridement is billed using codes 11042 to 11047, based on the deepest layer treated in the debridement process. The billing of both codes for one wound will be subject to bundling as per NCCI edits, and the deeper layer of the wound should be billed with calcification being done at a milder depth. Wounds at the same depth are combined by surface area and billed once. For more on code choice, see our guide to wound debridement CPT codes.

Documentation That Supports the Units

Each note should show:

• The number of wounds and their locations, if more than one needs to be taken into account.
• The centimeters for length, width, and depth shall be measured both before and after the treatment. 
• The area of healing needs to be specified apart from the size parameters of the wound. 
• The instrument or technique used.
• The type of tissue removed.

The auditing guide on FindACode lists missing total area and missing tissue type as audit findings. An unspecified tissue type can make the debridement non-billable.

Errors That Cost Payment

• The codes being billed are 97598 and not 97597 for the same charge. 
• Coding for a call where the doctor’s visit took place needs to be addressed only in one area of the procedure. 
• Submitting an evaluation and management (E/M) charge on the same day without Modifier 25 or separately identifiable evaluation is another offense recorded in this section. 
• Debriding under Medicare without documenting progress.

Skin Substitute Application: CPT 15271 to 15278

The Application Codes

The application codes depend on the site and the wound area. Add-on codes report each additional block of area.

Skin Substitute Application Codes

Site	First 25 sq cm	Each additional 25 sq cm	First 100 sq cm	Each additional 100 sq cm
Trunk, arms, legs	15271	15272	15273	15274
Face, scalp, eyelids, mouth, neck, ears, orbits, genitalia, hands, feet, digits	15275	15276	15277	15278

The 100 sq cm codes also apply at 1 percent of body area for infants and children. The product itself is reported with a separate HCPCS code.

What Changed in 2026

The new Physician Fee Schedule has made it official as of January 1, 2026, that the majority of skin substitutes fall under the classification of incident-to supplies through a final rule. Reed Smith reports an initial payment rate of approximately $127.28 per square centimeter, adjusted by geography. Only an item with a Section 351 biologics registration keeps its payments on an average sales price basis. The Centers for Medicare & Medicaid Services looked into other timelines but opted to remain on the same timeline, but is giving us the possibility of changes. Find out how you are affected by the specific regulation since it’s different for outpatient departments and offices. 

Two billing points follow:

• Only applied units are paid. According to a CMS FAQ summarized by Wounds, providers may bill Medicare only for the units actually administered. Discarded product is not paid.
• JW and JZ do not apply. The same FAQ says the JW and JZ modifiers are limited to drugs and biologicals, so they are not used on non-BLA skin substitutes billed as incident-to supplies.

Frier Levitt expects contractors to look closely at wound size, treated area, and quantity applied. Your note should support all three.

What to Document

• Wound size and the surface area treated.
• The exact quantity of product applied.
• The product name and the HCPCS code that matches its FDA category.
• The reason for repeat applications.

Payer Contract Checks

A payer can pay a claim correctly under policy and still pay it incorrectly under your contract. Run these checks for each payer.

1. Get the fee schedule for every code you bill. That means 97597, 97598, 15271 to 15278, and the product HCPCS codes.
2. Ask how skin substitute products are paid. Find out whether they are a separate line, at what rate, and whether the contract follows the Medicare 2026 change.
3. Check multiple procedure rules. Confirm whether the payer reduces add-on or second procedures and whether the contract allows it.
4. Confirm modifier recognition. Ask whether the payer accepts 59 or the X modifiers and 25, and how it treats them.
5. Compare ERAs with the fee schedule. Pull paid amounts for each code from recent remittances. A paid amount below the contract rate is an underpayment to dispute.
6. Record the dispute windows. Note the timely filing and appeal deadlines in each contract.
7. File the payer policy. Keep the coverage policy or LCD the payer applies to wound care.

Our denial management process covers the appeal once an underpayment is found.

Wound Care Charge Capture Checklist

Charge capture means every service is recorded as a charge. Charge reconciliation checks that each charge is correct. A January 2021 BKD presentation on charge capture names the leakage points: bedside procedures, supplies, late charges, outdated chargemaster lines, and documentation gaps. Use this checklist, which applies those points to wound care.

1. Enter charges the day of the visit, by the person who delivered the service.
2. Use a note template with fields for wound number, length, width, depth, and area.
3. Record pre- and post-procedure measurements for every debridement.
4. Capture the instrument, tissue type, and total area debrided.
5. Calculate 97598 units from the recorded total area.
6. Log every skin substitute applied with product, lot, quantity, and wound area.
7. Match the billed HCPCS code and quantity to the product log.
8. Capture supplies ordered and attach signed orders.
9. Reconcile charges against the daily schedule.
10. Review late charges each week and trace each to its cause.
11. Keep the chargemaster current when codes or rates change.
12. Audit a sample of notes each month against the claims.

FQHC Billing Requirements for Wound Care

Federally Qualified Health Centers bill Medicare under a prospective payment system, so the rules differ from a private wound clinic. These points come from the Noridian FQHC billing guide.

How the Visit Is Paid

FQHC claims use bill type 77X. A payment code from G0466 to G0470 goes on its own line with a qualifying visit code. The FQHC is paid the lesser of its charge or the PPS rate, and the rate is adjusted for location. Only one billable encounter per date is paid. A second encounter needs modifier 59 and a new illness or injury after the first visit. The base rate changes each year, so check the CMS update for the current figure.

What You Still Capture

Incident-to supplies and procedures are reported on separate service lines with revenue codes and HCPCS codes. Noridian describes this as data reporting. A debridement may not add payment, but the line should still be accurate. Ask your MAC how skin substitute products are handled at your health center.

How A2Z Medical Billing Services Helps Wound Care Practices

Our team checks debridement and skin substitute claims against the chart, reviews paid amounts against your contracts, and flags underpayments for appeal. Our wound care billing services cover coding, documentation review, denials, and reporting for wound care practices.

Frequently Asked Questions

What is a wound care underpayment?

It is a claim that is paid, but for less than the contract rate or the coding supports. Causes include undercoded visits, missing modifiers, weak debridement notes, and product mismatches.

How do I know if a payer underpaid a wound care claim?

Compare the paid amount on the ERA with the fee schedule for that code. Check the E/M level and modifiers on the claim as well. A gap you cannot explain is worth a dispute.

What is the difference between 97597 and 97598?

97597 covers selective debridement of the first 20 sq cm or less. 97598 is an add-on for each additional 20 sq cm. You cannot bill 97598 without 97597.

Can I bill 97597 and 11042 for the same wound?

No. Reporting both for the same wound triggers NCCI bundling edits. Code to the deepest tissue actually removed.

How are skin substitutes paid in 2026?

Since January 1, 2026, Medicare pays most non-BLA skin substitutes as incident-to supplies at an initial rate of approximately $127.28 per square centimeter. Only applied units are paid. Check how your setting is paid.

What is charge capture in wound care?

It is the process of recording every service and supply as a charge. In wound care, that includes debridement area, skin substitute quantity, and supplies ordered.

What are the FQHC billing requirements for wound care?

FQHCs bill visits with G0466 to G0470 on bill type 77X and are paid a PPS rate per qualifying visit. Procedures and incident-to supplies are reported on separate lines for data.

Final Thoughts

Most wound care revenue loss comes from small gaps in measurement, coding, and follow-up. Fix the notes first, then check the claim against the chart and the paid amount against the contract. A daily charge capture routine keeps the same gaps from returning. If you want help running these checks, our team can do it with you.