Summary & Overview
HCPCS G9304: Operative Report—Prosthetic Implant Specifications
HCPCS Level II code G9304 denotes documentation in the operative report that specifies prosthetic implant details — the manufacturer, brand name, and size of each implant. Accurate recording of these elements supports clinical follow-up, implant tracking, device surveillance, and administrative processes tied to surgical implant care. Nationally, standardized documentation of implant specifications is important for device safety monitoring, post-market surveillance, and continuity of care across providers and health systems.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical context and typical sites of service, plus guidance on where this code fits into surgical documentation workflows. The publication highlights expected use cases for operative reporting when implants are placed and outlines what documentation this code represents.
The content covers clinical relevance, common modifiers associated with surgical reporting when available, and notes on data availability. Data not available in the input is explicitly identified where applicable. This summary is intended for billing managers, surgical documentation specialists, compliance officers, and clinicians who need a clear, national-level explanation of HCPCS Level II code G9304 and its role in operative implant documentation.
Billing Code Overview
HCPCS Level II code G9304 documents that an operative report identifies the prosthetic implant specifications, including the prosthetic implant manufacturer, the brand name, and the size of each implant. This code reflects documentation of implant details within a surgical operative report.
Service Type: Operative surgical documentation
Typical Site of Service: Hospital operating room or ambulatory surgical center, where prosthetic implants are placed and operative reports are generated.
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with advanced osteoarthritis of the right knee is scheduled for total knee arthroplasty. Preoperative evaluation documents pain, functional limitation, and radiographic joint space loss. Intraoperatively, the surgeon implants a modular hinged knee prosthesis. The operative report documents the prosthetic implant manufacturer, the brand name, and the size of each prosthetic component (femoral, tibial, and polyethylene insert). The documentation is used to support device identification reporting requirements, supply inventory reconciliation, and payer adjudication.
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Service Type: Intraoperative operative report content documenting prosthetic implant specifications.
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Typical Site of Service: Hospital inpatient or ambulatory surgery center where joint arthroplasty procedures are performed.
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Typical Patient Workflow:
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Preoperative evaluation and optimization, consent for arthroplasty.
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Operative procedure with implantation of prosthetic components; surgical tech and circulating nurse record lot numbers and implant labels.
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Surgeon documents in the operative report the prosthetic implant manufacturer, brand name, and size of each implanted component (supports billing, warranty, and device tracking).
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Postoperative inpatient recovery or same-day discharge with outpatient follow-up; implant details included in discharge summary and given to the patient for future reference.