Summary & Overview
CPT 28725: Subtalar Joint Fusion for Degenerative Arthritis or Trauma
CPT code 28725 denotes subtalar joint fusion, an orthopedic surgical procedure used to treat degenerative arthritis or traumatic injury of the subtalar joint. This code captures a definitive reconstructive treatment that can alleviate pain, stabilize hindfoot alignment, and restore function. Nationally, subtalar arthrodesis is a relevant procedure for orthopedic surgery, podiatry, and hospital surgical services because of its implications for utilization, surgical site resources, and post‑operative rehabilitation.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for when the code is reported, typical sites of service, and the service type. The publication provides benchmark and coverage perspectives, outlines common billing considerations tied to surgical arthrodesis procedures, and highlights policy or reimbursement themes that commonly affect payment for lower‑extremity fusion procedures.
This summary equips billing managers, revenue cycle professionals, and clinical leaders with a clear definition of CPT code 28725, the clinical scenarios that generate it, and the payer landscape relevant to national billing and policy discussions. Data not available in the input will be noted where applicable.
Billing Code Overview
CPT code 28725 describes a surgical procedure in which the provider performs fusion of the subtalar joint of the foot to treat degenerative arthritis or trauma. The service type is an operative orthopedic procedure focused on joint arthrodesis. The typical site of service is an inpatient or outpatient surgical setting such as an ambulatory surgery center or hospital operating room, depending on clinical complexity and patient needs.
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Clinical & Coding Specifications
Clinical Context
A 58-year-old patient presents with chronic hindfoot pain, instability, and limited ambulation after progressive post-traumatic degenerative change of the subtalar joint. Conservative measures including activity modification, orthotics, nonsteroidal anti-inflammatory drugs, and a trial of corticosteroid injection provided temporary or inadequate relief. Imaging (weight-bearing radiographs and CT) demonstrates joint space collapse and osteophyte formation isolated to the subtalar joint. The orthopedic foot and ankle surgeon schedules a subtalar arthrodesis (CPT 28725) performed in an ambulatory surgery center or hospital operating room under general or regional anesthesia. The clinical workflow includes preoperative assessment, informed consent, preoperative imaging review, intraoperative joint preparation with debridement of articular cartilage, bone grafting or autograft/allograft placement as needed, fixation (screws or plates), intraoperative fluoroscopic confirmation of alignment, and postoperative immobilization with a cast or boot and non-weightbearing instructions. Postoperative care includes pain control, wound checks, serial radiographs to document fusion, and gradual progression to weightbearing over 8–12 weeks when radiographic union is confirmed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased Procedural Services | Use when work required is substantially greater than typical for , documented with rationale and operative report detailing added complexity. |