Summary & Overview
CPT 29877: Knee Arthroscopy With Cartilage Debridement
CPT code 29877 represents knee arthroscopy with debridement and repair of articular cartilage, an orthopedic procedure used to relieve pain and improve joint mobility. Nationally, this code is widely used for minimally invasive treatment of symptomatic cartilage damage and meniscal or chondral lesions. Its prevalence and reimbursement implications make it a frequent focus for payers, surgical practices, and health systems.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context about the procedure, typical sites of service, and operational considerations for outpatient surgical settings. The publication summarizes common billing and coding themes, payer coverage patterns, and benchmarking context where available.
This resource is intended to help billing professionals, surgical providers, and policy analysts understand the clinical purpose of CPT code 29877, what to expect in terms of site of service, and which national payers commonly cover this service. Data not available in the input is noted where applicable; the focus remains on clear clinical and coding definitions and on the scope of payers covered in the national overview.
Billing Code Overview
CPT code 29877 describes an arthroscopic procedure in which the provider inspects the inside of the knee joint with an arthroscope and repairs the joint by reshaping the articular cartilage and trimming or shaving damaged tissue. The procedure is performed to relieve pain and improve mobility in the knee.
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Service type: Knee arthroscopy with debridement/repair of articular cartilage (operative arthroscopy)
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Typical site of service: Ambulatory surgical center or hospital outpatient department
Clinical & Coding Specifications
Clinical Context
A 45-year-old recreational athlete presents with several months of progressive right knee pain, intermittent swelling, and mechanical symptoms (locking and catching) after a twisting injury while playing soccer. Clinical exam demonstrates joint line tenderness and a positive McMurray test. MRI shows a medial meniscal tear with fraying of the articular cartilage (chondral lesion) but no diffuse osteoarthritis. After failed conservative treatment (rest, NSAIDs, physical therapy, and intra-articular corticosteroid or hyaluronic acid injection), the orthopedic surgeon schedules an arthroscopic knee procedure.
The procedure is performed in an ambulatory surgical center under regional or general anesthesia. The surgeon introduces an arthroscope to inspect the interior of the knee joint, confirms the meniscal tear and chondral pathology, performs partial meniscectomy or meniscal repair as indicated, and performs chondroplasty (shaving/reshaping damaged articular cartilage) to smooth irregular surfaces and reduce mechanical symptoms. Postoperative recovery includes short monitored PACU observation, discharge with analgesics and a physical therapy plan, and scheduled follow-up for wound check and rehabilitation progression.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when operative work is substantially greater than typical for 29877 (extensive debridement or additional complex work documented). |