HCPCS code Q4187 – Epicord umbilical cord allograft billing guide

Key takeaways

HCPCS code Q4187 covers Epicord (MiMedx), a dehydrated human umbilical cord allograft billed per square centimeter.

Units equal wound length times width in centimeters, rounded to the nearest whole number and never above the graft size applied.

Q4187 is an add-on supply code, so it must share a claim with a 15271-15278 application code or it denies.

Medicare pays a flat CY2026 rate of $127.14 per square centimeter, with no locality or GPCI adjustment.

Medicare coverage depends on documented wound type, wound duration, failed conservative care, and same-day measurements.

Pabau’s claims management software pre-fills Q4187 claims from the patient record and checks required claim fields before submission.

HCPCS code Q4187 pays for the Epicord graft, not the work of applying it

HCPCS code Q4187 is the Level II supply code for Epicord umbilical cord allograft, per square centimeter. The Centers for Medicare and Medicaid Services maintains it. It pays for the graft itself. Placing that graft on the wound is a separate service, billed through a companion CPT application code.

Epicord is a dehydrated human umbilical cord (dHUC) allograft, derived from umbilical cord tissue. MiMedx processes it with its PURION PLUS technology. That tissue source is what separates it from Epifix (Q4186), a dehydrated amnion/chorion membrane, and it is why the two products carry separate codes.

Older Epicord claims may still sit under Q4131

Before Q4186 and Q4187 existed, Epifix and Epicord were both billed under Q4131. CMS later gave each product its own code in the HCPCS Level II file, so every claim now names the graft by descriptor.

Claims for dates of service after the transition belong under the product-specific code. Confirm the effective date in the CMS annual HCPCS file, because contractors can handle transition claims differently.

Q4187 or Q4186? Let the product label decide

With the history settled, the next call is which of the two MiMedx codes the invoice supports. Q4187 covers Epicord and Q4186 covers Epifix. Both come from MiMedx, but Epicord is an umbilical cord allograft and Epifix is an amnion/chorion membrane.

Picking the wrong code is a documentation error, and it can trigger a medical necessity review on a claim that would otherwise pay.

Product choice belongs to the treating clinician, based on the wound and on what is in stock. Code choice is simpler: match the HCPCS code to the product label on the invoice. If a supply shortage forces a swap, recheck that the payer’s LCD covers the graft that went on the wound.

A swap moves the supply line to the substitute’s own code. Truskin, for example, bills under Q4167 and carries its own coverage and prior authorization rules.

Counting Q4187 units takes one multiplication and one cap

Units for Q4187 equal the wound area in square centimeters on the date of service. Overbilled units rank among the most common audit triggers for skin substitute codes, yet the math itself is short. Here is the sequence, using a leg ulcer that measures 4.1 by 2.3 cm.

1. Measure the wound: Record the longest length and the widest width, perpendicular to each other, in centimeters on the date of service.
2. Calculate the area: Multiply length by width. The example wound gives 4.1 x 2.3 = 9.43 sq cm.
3. Round to whole units: Most MACs round to the nearest whole square centimeter, so the example bills 9 units. Check your own MAC’s rounding guidance, because policies differ.
4. Cap at the graft size: Units never exceed the size of the Epicord piece applied. A 4 sq cm graft on a 6 sq cm wound bills 4 units.
5. Document the math: The measurement behind the units must sit in that day’s chart note. A measurement from an earlier visit does not count.

Common error: billing the wound area instead of the graft that went on. Say the note records a 12 sq cm wound, but only a 4 sq cm piece went on. Billing 12 units is overbilling, whatever the wound size.

Carried through to payment, the same 4.1 by 2.3 cm wound produces one supply line and one procedure line.

Every Q4187 line needs a 15271-15278 partner code

HCPCS code Q4187 pays for the product only. Placing the graft is a separate procedure, reported with a CPT application code from the 15271-15278 series. Send Q4187 without one and the line denies for missing procedure reporting.

Pick the application code by anatomical site first, then by wound size. A plantar diabetic foot ulcer takes 15275, plus 15276 for each extra 25 sq cm. A venous leg ulcer takes 15271, plus 15272 beyond the first 25 sq cm. Both codes go on the same claim, never on separate claims.

The application side has its own traps, from site grouping to add-on sequencing. Our billing guide for CPT code 15271 covers that half of the claim in more depth.

Medicare covers Q4187 only when the chart shows conservative care failed

Medicare coverage for Q4187 is governed by CMS article 54117 and the MAC’s Local Coverage Determination (LCD). Coverage is never automatic. The treating provider has to show the patient meets the LCD’s medical necessity criteria before Epicord goes on, and before the claim goes out.

Across most MACs, the LCD checks follow a familiar pattern:

• Eligible wound types: Diabetic foot ulcer (DFU), venous leg ulcer (VLU), pressure injury (stage 3 or 4), and other chronic full-thickness wounds in the LCD
• Duration of wound: Most LCDs require the wound to have been present for a minimum period, often 4 weeks or longer, without adequate healing
• Prior conservative care: The record must show standard care came first, such as offloading, compression, moisture-balanced dressings, and infection management
• Size and depth: Length, width, and depth appear in the chart note for the date of service
• Frequency limits: LCDs typically cap applications per wound per episode of care, so check your MAC’s limit

LCD criteria are contractor-specific, so Novitas Solutions may cover what CGS, WPS, or NGS does not. Pull the active LCD from your MAC’s website before billing Q4187 for a new patient population under that contract.

Prior authorization for Q4187 depends on who holds the policy

Does traditional Medicare need prior authorization? Not under most MACs today. Parts A and B generally let the first application go ahead without it.

What about Medicare Advantage and commercial plans? UnitedHealthcare, Medicare Advantage plans, and most commercial payers require it before the first application. Send wound measurements, wound duration, ICD-10 codes, and proof of failed conservative care with the request. Recheck each payer every plan year, because these policies change often.

Where Epicord goes on decides who bills the graft

Once coverage is confirmed, the setting decides who gets paid for what. Place of service (POS) determines which entity bills Q4187 and which fee schedule applies to the application code.

In the physician office (POS 11), the practice captures both the supply payment and the application fee, which usually makes it the highest combined reimbursement. In a facility, the supply revenue goes to the facility instead of the individual provider.

The 2026 Medicare rate for Q4187 comes down to one flat number

For CY2026, CMS finalized a flat national payment of $127.14 per square centimeter for skin substitute grafts billed as incident-to supplies. That rate does not vary by MAC jurisdiction, locality, or geographic practice cost index (GPCI). You can confirm it in the CMS Medicare Physician Fee Schedule lookup tool.

That makes the supply math simple. The 9-unit wound from the unit section pays 9 x $127.14, or $1,144.26, for the graft. The 15271 application fee is paid on top, at its own fee schedule rate.

• Payment scales with units, so each square centimeter billed adds $127.14 to the Medicare supply line.
• The facility versus non-facility difference now sits in the application CPT fee, not in the Q4187 supply rate.
• Commercial and Medicare Advantage plans set their own rates. Some pay ASP (average sales price) plus a percentage, and others a flat per-cm rate.
• Confirm each commercial contract rate before the first case, because a financial model built on guessed rates breaks at the first remittance.

How a Q4187 claim moves from chart note to CMS-1500

Q4187 claims rarely fail for exotic reasons. They fail when a step gets skipped, so the same eight steps, run in the same order every time, catch most problems before submission.

1. Confirm LCD coverage: Check that the wound type is covered under your MAC’s active LCD. Pull it from the MAC’s website rather than an old printed summary.
2. Get prior authorization where needed: For Medicare Advantage and commercial plans, send the request with supporting records before the application date. Traditional Medicare generally does not require it, but confirm with your MAC.
3. Measure on the date of service: Record length x width in centimeters in the clinical note. That measurement is the billing basis for units.
4. Calculate units: Multiply, round per your MAC’s guidance, and confirm the total does not exceed the graft applied.
5. Pick the application code: Choose from 15271-15278 by site (trunk, arms, legs versus face, hands, feet) and by wound size.
6. Set the place of service: Use POS 11 for the office and POS 22 for outpatient hospital. The POS decides which rate applies and who bills which code.
7. Assemble the records: Attach the wound photo, the measurement note, ICD-10 codes, the conservative care history, and the product invoice or label.
8. Submit one clean claim: Q4187 and the application CPT go on the same CMS-1500, with matching diagnosis pointers and no empty required fields.

Before you submit: The Q4187 documentation checklist

Missing or thin documentation is the leading reason Q4187 claims are denied on reopening or audit. Tick each item below before the claim leaves the practice:

• Wound type and ICD-10-CM code(s) capturing laterality, anatomical site, and stage or severity (see the ICD-10 section below)
• Wound measurements (length x width, plus depth where the LCD requires it) in the visit note for the date of service
• Wound duration, with a documented start date or onset history
• Prior conservative care plan, with dates and outcomes showing inadequate healing
• Product name (Epicord), lot number, and expiration date from the product label or invoice
• Ordering provider credentials, as some LCDs require a physician order for skin substitute products
• Wound photographs, where the MAC’s LCD requires them

The diagnosis code for Q4187 has to be as specific as the wound

With the claim built, the diagnosis is the last place a Q4187 line can fall short. Pairing it with an unspecified or wrong ICD-10-CM code is a top LCD non-coverage trigger. Code to the highest specificity available, including laterality, site, and severity or stage.

Use the ICD-10-CM code set for the current fiscal year. It updates every October 1, so a code valid in FY2025 can be revised or deleted in FY2026. The CMS ICD-10 codes page publishes the annual update files.

Seven Q4187 denials that keep coming back, and the fix for each

Nearly every Q4187 denial traces back to a skipped step from the sections above. The table maps each common denial to its root cause and fix. Match the CARC and RARC codes your payer returns against our guide to medical billing denial codes to see which row applies.

Log every Q4187 denial by root cause, and review the tally weekly during the first 90 days of a new wound care program. Patterns show up fast, and one corrected template often clears a whole row of the table.

Commercial and Medicaid payers write their own Epicord rules

Medicare pays most wound care Q4187 claims, but commercial and Medicaid coverage keeps expanding. Each of these payers sets its own criteria, so the Medicare checklist above is a starting point rather than a guarantee.

• Texas Medicaid (TMHP): Listed Q4186 and Q4187 as covered benefits effective January 1, 2019. Check the current criteria in the TMHP provider bulletin, since requirements may have changed since then.
• UnitedHealthcare: UHC publishes a policy for cellular and tissue-based products (CTPs) that covers select umbilical cord allografts, including Q4187. It usually requires prior authorization and applies its own criteria, which can differ from Medicare LCDs. Read the CTP policy on the UHC provider portal before billing a commercial UHC plan.
• Other commercial payers: Aetna, Cigna, and BCBS affiliates each have their own medical policies for skin substitute products. Coverage, required diagnosis codes, and PA rules differ by plan, and a payer that covers DFU may not cover VLU in the same policy year.
• Medicare Advantage plans: MA plans start from Medicare coverage rules but may add prior authorization and preferred-product lists. Some cover Q4187 only when Epicord is on an approved formulary, so confirm before ordering.

If you bill several payers, keep a payer-by-payer coverage matrix for Q4187. It stops claims from going to plans that will deny on coverage before anyone reads the records. The AAPC HCPCS code lookup helps when a payer policy describes the product in different terms.

How Pabau keeps Q4187 claims complete before they go out

Many wound care teams still build a Q4187 claim by hand. Someone copies codes from the chart, rechecks the member ID, and lines up the diagnosis pointers one by one.

Pabau, the practice management and billing platform we build, starts the claim from the patient record instead. The application CPT attached to the service lands on the charge line, and ICD-10 slots are seeded from the recorded problem list. Built-in HCPCS and ICD-10 lookup libraries let coders confirm Q4187 and its diagnoses without leaving the claim.

Before sending, Pabau’s claims software for practices checks that required fields, such as membership numbers and authorization codes, are complete. Claims then go out through its clearinghouse connections, which include Claim.MD for US practices.

Fewer claims bounce back for missing data, so your team spends its time on coverage questions instead of rework.

Send cleaner Q4187 claims the first time

Pabau pre-fills skin substitute claims from the patient record, gives coders HCPCS and ICD-10 lookup, and checks required claim fields before submission.

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Conclusion

Q4187 rewards practices that treat it as two lines on one claim. The supply line is priced by the square centimeter, and the procedure line is priced by site. With a flat 2026 rate, the supply side is now the predictable half.

The judgment call sits upstream, in the chart. An umbilical cord allograft documented against the LCD, measured on the day, and capped at the graft size will pay. The same graft with a missing measurement will not, however clean the codes look.

So spend your audit time on the wound note first and the claim form second. If claim prep still eats hours, book a demo to see how Pabau pre-fills and field-checks skin substitute claims before they reach the payer.

Continue your research

Still holding Epicord claims under the old shared code? HCPCS code Q4131 explains how the shared Epifix and Epicord code split into Q4186 and Q4187.

Billing a different skin substitute on the same 2026 rate? HCPCS code Q4127 applies the same unit math and flat payment to Talymed.

Need a framework for managing billing denials across your practice? Denial management in healthcare covers the full denial lifecycle from root cause analysis to appeal strategy.

Want every billable element captured before the claim leaves? Superbill preparation walks through what a complete superbill records for each visit.

Looking to cut resubmissions? Clean claim submission lists the fields and checks that get a claim paid on first pass.

Frequently asked questions