HCPCS code Q4114 – Integra flowable wound matrix injectable

Key takeaways

Q4114 is an HCPCS Level II Q-code that identifies one product, the injectable Integra Flowable Wound Matrix, billed per 1cc.

Units are calculated as total cc applied per session, in whole numbers. 2.5cc applied rounds to 3 units (confirm your MAC’s rounding rule).

Medicare pays Q4114 at a price your MAC sets, outside both ASP pricing and the 2026 flat skin substitute rate.

The KX modifier on Medicare claims affirms that medical necessity criteria are met, and leaving it off is a leading denial trigger.

In Pabau’s claims management software, wound measurements and cc applied are recorded at the point of care, so billed units match the chart.

HCPCS code Q4114: Definition and official descriptor

HCPCS code Q4114 describes the Integra Flowable Wound Matrix injectable at a unit of service of 1cc. The full official descriptor, as published by the Centers for Medicare and Medicaid Services (CMS), is: Integra flowable wound matrix, injectable, 1cc.

Integra Flowable Wound Matrix is a bovine collagen-based extracellular matrix product manufactured by Integra LifeSciences. It is indicated for managing chronic and acute wounds, including diabetic foot ulcers, venous leg ulcers, and surgical wounds.

The flowable, injectable formulation sets it apart from sheet-form skin substitutes. It is delivered directly into irregular wound cavities where a flat graft would not conform.

Q4114 sits within the HCPCS Level II Q-code range. These are temporary codes CMS assigns to products and services that CPT’s permanent codes don’t cover.

Payers file it under skin and soft tissue substitutes, also called cellular and tissue-based products (CTPs). That category decides how Medicare and most commercial payers classify, authorize, and reimburse wound matrix products.

Medicare coverage rules for Q4114

Medicare coverage and documentation rules for Q4114 are set by your Medicare Administrative Contractor (MAC). The CMS billing guidance written for sheet-form skin substitute grafts on lower-extremity wounds excludes injected products like Q4114. Check your own MAC’s policy and published articles before the first application.

Covered indications

MACs commonly cover Q4114 for the following wound types, provided the wound has failed to improve with at least four weeks of standard wound care:

• Diabetic foot ulcers (ICD-10-CM: E11.621, E11.622, E11.628, E11.629)
• Venous stasis leg ulcers (ICD-10-CM: I87.2, I87.31, I87.33)
• Pressure ulcers / injuries, stage 3 or 4 (ICD-10-CM: L89 series, stage 3/4 codes)
• Chronic surgical wounds failing conservative management

Non-covered indications

Medicare does not cover Q4114 for cosmetic purposes. Acute traumatic wounds without documented failure of conservative care are excluded too, as are burns that fall under a separate wound-care policy. Claims are routinely denied as not medically necessary when the wound skipped the minimum period of conservative treatment.

How to bill Q4114: Units, place of service, and modifiers

Three variables decide whether a Q4114 claim pays: the cc applied per session, the place-of-service (POS) code, and any required claim modifiers. Errors in any of them are among the top reasons Q4114 claims are flagged or denied.

Calculating units

Q4114 is billed per 1cc of product applied, and units must be whole numbers. When a fraction remains, round per your MAC’s published policy. If 2.5cc is applied in one session, most MACs allow 3 units, but confirm the rounding rule before submitting.

Valid place-of-service codes

• POS 11: Physician office, the most common setting for outpatient wound care application.
• POS 22: On-campus outpatient hospital, where reimbursement differs under OPPS.
• POS 23: Emergency room in a hospital. Use it only when the application is part of an emergency encounter.

Applicable modifiers

• KX: Required on Medicare claims to attest that the patient meets your MAC’s medical necessity criteria. Missing the KX modifier is one of the most common Q4114 denial reasons.
• RT / LT: Right side or left side. Use it when the wound is on a paired anatomical site, such as the right foot versus the left foot.
• GY: Item or service statutorily excluded. Use it when billing a non-covered service so the claim generates an Advance Beneficiary Notice (ABN) denial for the patient’s records.

Q4114 reimbursement rates and fee schedule

Medicare pays Q4114 at a price your MAC sets. CMS gives the code HCPCS pricing indicator 13, which means the price is established by the carrier. Each MAC therefore publishes its own allowed amount.

CMS’s CY2026 skin substitute rule moved most sheet products to a flat rate of $127.14 per square centimeter. Non-sheet and injectable products like Q4114 were left out of that rate and out of Average Sales Price (ASP) pricing. They stay on MAC-determined pricing.

Because the rate comes from your MAC, check its current fee schedule before each billing cycle. If you bill in both office and hospital outpatient settings, confirm how your MAC prices the code in each one.

Commercial payer rates vary by contract. BCBS plans, UnitedHealthcare, and Medicaid each apply their own fee schedules, which may sit above or below your MAC’s rate. Never assume the Medicare rate applies to a commercial claim.

Prior authorization requirements by payer

Prior authorization (PA) requirements for Q4114 vary by payer and are a common root cause of post-service denials. Medical billing workflows that front-load the PA step prevent most of these denials before a claim goes out.

For BCBS and UHC, the PA request typically asks for:

• Wound type and dimensions.
• How long the wound has been present.
• Prior conservative treatment history.
• The treating physician’s clinical rationale for a skin substitute over continued standard wound care.

Documentation requirements to support a Q4114 claim

Every element below must appear in the medical record at each application visit, not only at the initial assessment. Complete records are what medical billing compliance rests on when a payer requests documentation for a skin substitute claim.

• Wound measurements: Length, width, and depth recorded in centimeters at every application visit.
• Wound type and ICD-10 code: Specify the wound diagnosis (e.g., diabetic foot ulcer, venous leg ulcer) and record the corresponding ICD-10-CM code.
• Duration of wound: Date of wound onset or first documentation. It establishes that conservative treatment preceded skin substitute use.
• Conservative treatment history: At least four weeks of standard wound care (debridement, compression, offloading, moisture balance) documented before Q4114 application.
• Product lot number: Record the lot number of the Integra Flowable Wound Matrix vial used at each session.
• Quantity applied: Total cc applied, which must support the billed units after rounding.
• Photograph or wound tracing: Visual documentation of wound status at baseline and at each application visit.
• Physician attestation of medical necessity: A signed chart statement that your MAC’s criteria are met. It also confirms the product is medically necessary for this patient.
• Plan of care: A documented treatment plan specifying the anticipated number of applications and the clinical endpoints for re-evaluation.

Q4114 vs related wound matrix HCPCS codes

Q4114 is frequently confused with adjacent Integra product codes and other skin substitute Q-codes. The table below is the fastest way to confirm you are using the right code before submitting a claim. Coders can look up any of these codes using the AAPC HCPCS code lookup or the PGM Billing HCPCS lookup tool.

The most common confusion is between Q4114 and the sheet-form Integra codes. Q4108 covers Integra Matrix, a single-layer sheet billed per square centimeter.

The two-layer Integra Bilayer Matrix Wound Dressing has its own code, Q4104. Q4114 covers only the injectable flowable matrix, billed per cc, so submit the code that matches the product applied.

Graftjacket Xpress bills per cc under Q4113, but it is a human acellular dermal matrix rather than Integra’s bovine collagen. Both products are injected, so the code follows the product name, not the delivery method.

Common Q4114 claim denial reasons and how to resolve them

Most Q4114 denials fall into a small set of recurring patterns. Good denial management in healthcare starts with identifying the pattern before choosing a resolution path. The remittance advice names each one with a reason code, and our reference on denial codes for billers explains them.

Mapped back to the workflow, those seven denials trace to five checkpoints, each completed before the claim is submitted.

Pre-submission checklist for Q4114 claims

A consistent pre-submission checklist prevents the recurring errors that turn into denied and resubmitted claims. Build it into your wound care claims software, and units, modifiers and lot numbers get checked before each claim leaves your system.

• Verify coverage criteria before ordering: Confirm the wound type, wound duration, and conservative treatment history meet your MAC’s requirements before ordering the product.
• Document wound measurements at every visit: Record length, width, and depth in centimeters at the time of application, never reconstructed after the fact.
• Record the product lot number in the chart: It ties the billed product to the clinical record, and ADR requests often ask for it.
• Calculate cc units from the chart, not from the order: Bill only the cc documented as applied, not the amount ordered or stocked.
• Attach the KX modifier on every Medicare claim: Set it as a default modifier for Q4114 in your billing system. Flag any claim missing it before submission.
• Check your MAC’s rate each billing cycle: Q4114 is carrier-priced, so a stale rate in your fee schedule can mean under-billing or payer edits.
• Confirm commercial payer PA requirements before each application: PA requirements change with annual policy updates. Check the payer portal, not your memory of last year’s policy.
• Submit clean claims: A clean claim carries no errors in POS codes, modifier sequencing, or diagnosis pairings. Those errors trigger automated rejections before a reviewer sees the claim.

How Pabau ties wound documentation to Q4114 claims

Wound care practices billing Q4114 work across three records. Wound measurements live in the clinical note, the lot number sits on the vial label, and the billed units have to match both. When those records sit in separate systems, unit mismatches and missing lot numbers follow.

Pabau records wound measurements and the cc applied inside the clinical note at the point of care. Billing staff check the documented cc against the Q4114 units on the claim without switching between a paper chart and a billing platform.

For commercial payers, your team attaches an authorization case when booking the application. Pabau then tracks how many approved sessions have been used, so the next visit isn’t booked against an exhausted approval.

Stop chasing Q4114 authorizations manually

Your team attaches an authorization case when booking each Q4114 application. Pabau tracks the approved sessions through to claim submission, so no visit is billed against an expired approval.

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Conclusion

Q4114 claims get paid when three numbers agree: the cc in the chart, the units on the claim, and the sessions your payer approved. Each of those is settled before the patient leaves the room, so that is where the checking belongs.

Pricing is the other moving part. Because Q4114 is carrier-priced, a rate copied from an ASP file or another MAC’s schedule will be wrong. Keep your MAC’s current fee schedule in your billing system and recheck it every cycle.

Book a demo to see how Pabau links wound notes, authorization cases and Q4114 claims in one patient record.

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