Summary & Overview
CPT 29866: Arthroscopic Knee Cartilage Repair with Transplantation
CPT code 29866 represents arthroscopic knee cartilage repair with harvesting and transplantation of healthy cartilage to replace damaged tissue. This procedure is a minimally invasive orthopedic surgery used to treat focal chondral defects and preserve joint function; it has implications for surgical outcomes, post-operative rehabilitation, and payer coverage policies nationwide. The code is important for hospitals and ambulatory surgery centers that manage knee preservation and restorative cartilage procedures.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for cartilage repair, typical sites of service, common billing modifiers, and payer coverage considerations. The publication summarizes national benchmarks where available, highlights relevant policy and coverage themes affecting reimbursement and prior authorization, and outlines how this code aligns with related surgical services.
This report is intended for revenue cycle professionals, orthopedic surgeons, clinical coders, and policy analysts seeking a concise reference on billing, clinical purpose, and payer landscape for arthroscopic knee cartilage transplantation under CPT code 29866. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 29866 describes an arthroscopic procedure in which the provider inspects the interior of the knee joint and performs cartilage repair by harvesting healthy cartilage and transplanting it to replace damaged tissue. The procedure involves the use of an arthroscope and surgical instruments to evaluate articular cartilage and perform biologic repair or transplantation.
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Service type: Arthroscopic knee cartilage repair with autologous or other cartilage transplantation
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Typical site of service: Hospital outpatient department or ambulatory surgery center
Clinical & Coding Specifications
Clinical Context
A 28-year-old active patient presents with months of anterior knee pain, mechanical catching, and failed conservative management including physical therapy and injections. MRI demonstrates an isolated full-thickness chondral defect of the femoral trochlea measuring approximately 2.5 cm2. The orthopedic surgeon schedules an arthroscopic autologous chondrocyte transplantation procedure. In the operating room under regional or general anesthesia, the provider performs diagnostic arthroscopy of the knee joint with standard arthroscopic portals, inspects the articular surfaces, harvests healthy cartilage from a nonweight-bearing area, prepares the chondral defect, and implants the harvested cartilage graft to restore the articular surface. Postoperative workflow includes routine PACU recovery, pain control, thromboprophylaxis as indicated, and a structured rehabilitation program with restricted weight bearing and progressive range-of-motion exercises over several months. Typical site of service is an ambulatory surgical center or hospital outpatient department; inpatient admission is uncommon unless comorbid conditions require it.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work or time substantially exceeds typical for the procedure due to complexity (document rationale). |