Summary & Overview
CPT 27625: Ankle Synovectomy, Open Surgical Procedure
CPT code 27625 represents an open ankle synovectomy — incision of the ankle joint with removal of the synovial membrane for diagnostic and therapeutic purposes. This surgical code is significant nationally because it captures a definitive operative intervention for inflammatory or mechanical ankle disorders that require direct intra-articular access. Use of this code has implications for surgical utilization, facility resource planning, and post-operative care pathways.
Key payers considered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent and typical sites of service, payer coverage patterns, and common billing considerations. The publication outlines national benchmarks where available, recent policy or coding clarifications affecting surgical coding and documentation, and the clinical context that justifies use of this code versus alternative procedures.
This summary is intended for clinicians, billing specialists, and policy professionals seeking a clear, national-level reference on when CPT code 27625 is used, what it denotes clinically, and which payers commonly adjudicate claims for this service. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 27625 describes an open surgical procedure in which the provider incises the ankle joint and removes synovial membrane. The service is performed to both diagnose and treat intra-articular pathology of the ankle, such as synovitis, inflammatory disease, or mechanical derangements identified by clinical evaluation.
Service Type: Open surgical synovectomy of the ankle joint
Typical Site of Service: Hospital operating room or ambulatory surgery center (inpatient or outpatient surgical setting)
Clinical & Coding Specifications
Clinical Context
A 42-year-old recreational runner presents with several months of anterior ankle pain, swelling, and limited range of motion after an inversion injury. Conservative care including activity modification, NSAIDs, and physical therapy failed to resolve symptoms. Clinical exam demonstrates joint line tenderness and crepitus; ankle radiographs are inconclusive. The orthopedic surgeon schedules an open ankle synovectomy with diagnostic inspection of the tibiotalar joint to remove inflamed synovium, obtain tissue for pathology and cultures if indicated, and to address intra-articular impingement or loose bodies.
Preoperative workflow includes history and physical examination, informed consent documenting diagnostic and therapeutic intent, review of imaging (radiographs, optional MRI), perioperative antibiotic planning, and anesthesia evaluation. Intraoperatively the provider performs an incision into the ankle joint, evacuates synovial hypertrophy, inspects cartilage surfaces, removes loose bodies if present, and may perform limited debridement. Specimens are sent for pathology or microbiology when appropriate. Postoperative workflow includes pain control, wound care instructions, activity restrictions, and follow-up for suture removal and rehabilitation planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased Procedural Services | Use when the synovectomy required substantially more work than typical due to extensive synovial disease or multiple prior surgeries leading to increased complexity. |