Summary & Overview
HCPCS Q4235: Amniorepair (Altiply) per Square Centimeter
HCPCS Level II code Q4235 denotes an add-on billing code for amniorepair or altiply, billed per square centimeter when used as an adjunct to a primary surgical procedure. The code captures use of an amniotic membrane repair or similar biologic graft applied intraoperatively and is relevant for surgical specialties that employ biological dressing or tissue repair materials. Nationwide use of such adjuncts has implications for procedure-level cost reporting and claims adjudication when billed in addition to primary services.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find a concise overview of the code’s clinical context, typical sites of service, and what stakeholders review when this add-on material is billed alongside a primary procedure. The publication outlines common billing considerations, typical modifiers reported with add-on products, and where to look for coverage policy language among major commercial and public payers.
This summary provides clinicians, coding staff, and revenue cycle managers with the primary clinical meaning of HCPCS Level II code Q4235, expected use cases in procedural settings, and the topics covered further in the report: billing benchmarks, payer policy distinctions, and documentation elements relevant to claims processing.
Billing Code Overview
HCPCS Level II code Q4235 describes amniorepair or altiply, billed per square centimeter as an add-on procedure to be reported in addition to a primary procedure. This code represents a topical or local repair product applied to the amniotic membrane or similar tissue during a surgical procedure.
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Service type: Surgical adjunct / biological grafting material
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Typical site of service: Operating room or other procedural setting where surgical repair or grafting is performed
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Clinical & Coding Specifications
Clinical Context
A typical patient is a pregnant person presenting with premature rupture of membranes or iatrogenic amniotic membrane defects during a prenatal procedure who requires localized amniotic membrane repair using an amniotic membrane graft (e.g., Amniorepair/Altiply) measured and billed per square centimeter. The workflow begins with obstetric assessment in an outpatient maternal-fetal medicine clinic or labor and delivery unit. After confirmation of membrane defect by clinical exam and ultrasound, conservative management is attempted when appropriate. If repair is indicated, the obstetrician or maternal-fetal medicine specialist prepares the patient for a minor operative procedure in an ambulatory surgery center or hospital operating room under regional or general anesthesia depending on clinical status. The provider trims and sizes the amniotic membrane graft to the defect, applies the graft to the defect site, and secures it; the product is billed as an add-on per square centimeter using Q4235 in addition to the primary procedural code for the repair or delivery-related procedure. Post-procedure monitoring occurs in the same site of service with follow-up visits in clinic to assess membrane integrity, fetal status, and signs of infection.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work required to prepare and apply the amniotic membrane graft is substantially greater than typical (document rationale). |