Summary & Overview
HCPCS Q4366: Dual Layer Amnio Membrane Graft, Per cm2
HCPCS Level II code Q4366 designates a dual layer amnio membrane product billed per square centimeter as an add-on to a primary procedure. The code captures use of an implantable biologic membrane—commonly applied in surgical or advanced wound care settings—to support tissue regeneration and wound healing. Nationally, reporting of add-on biologic products like this affects procedural cost accounting, supply utilization tracking, and coverage determinations for regenerative therapies.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical role and billing context, plus coverage and payment considerations commonly encountered with HCPCS add-on supply codes. The publication outlines benchmarks for utilization and reimbursement patterns, summarizes relevant payer policy themes, and provides clinical context for when the product is used as an adjunct to surgical or wound procedures.
This summary is intended for billing professionals, revenue cycle leaders, and clinicians involved in procedural supply selection and documentation, offering a national perspective on coding, payment implications, and typical service settings for this biologic membrane add-on.
Billing Code Overview
HCPCS Level II code Q4366 describes a dual layer amnio burgeon x-membrane, reported per square centimeter. This code is an add-on, list separately in addition to primary procedure, indicating it is billed in conjunction with a primary surgical or wound-care procedure when the dual layer amnio membrane product is applied.
Service Type: Implantable biologic membrane graft (amnion/chorion), adjunctive wound or surgical application
Typical Site of Service: Operating room, ambulatory surgical center, or hospital-based procedure setting
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Clinical & Coding Specifications
Clinical Context
A common clinical scenario involves a patient with a non-healing ocular surface defect or corneal epithelial deficiency after trauma, prior ocular surgery, or persistent epithelial defects related to ocular surface disease. An ophthalmologist or corneal specialist prepares and applies a dual-layer amniotic membrane graft (amnio burgeon x-membrane) as an adjunctive, biologic wound-healing therapy to promote re-epithelialization, reduce inflammation, and provide a scaffold for tissue regeneration. The procedure is performed in an outpatient ambulatory surgery center or ophthalmology clinic procedure room under sterile conditions, often with local or topical anesthesia and sedation as needed.
Typical clinical workflow:
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Pre-procedure evaluation including ocular surface assessment, visual acuity, slit-lamp exam, and review of indications and contraindications.
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Preparation of the ocular surface with irrigation and debridement of devitalized epithelium if indicated.
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Sizing and placement of the dual-layer amniotic membrane over the defect; the code
Q4366is billed per square centimeter as an add-on to the primary ophthalmic procedure code (for example, membrane placement, conjunctival procedures, or corneal grafting). -
Securing the membrane with sutures, fibrin glue, or a bandage contact lens; documentation must include area (cm2) of membrane used, method of fixation, and concurrent primary procedure.
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Post-procedure instructions, topical antibiotics and anti-inflammatory agents as indicated, and scheduled follow-up to assess epithelialization and membrane integration or dissolution.