Summary & Overview
CPT 28088: Synovectomy of Extensor Tendon Sheath, Foot
Headline: New clinical coding focus: CPT code 28088 for foot extensor tendon sheath synovectomy
Lead: CPT code 28088 designates a surgical synovectomy of the extensor tendon sheath of the foot to remove inflamed or diseased synovium and relieve pain. This procedure is relevant for orthopedic and podiatric surgical services addressing tendon-related synovitis and can affect facility and professional billing across surgical settings.
CPT code 28088 represents a targeted soft-tissue surgical procedure addressing synovitis of the extensor tendon sheath in the foot. Nationally, it matters because it influences surgical case mix, resource utilization in ambulatory surgical centers and hospital operating rooms, and claims processing for musculoskeletal surgical care. The code is used by surgeons and billing teams to classify definitive synovectomy procedures on the foot.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an explanation of the clinical context for the procedure, typical sites of service, common modifiers associated with surgical billing, and how the code fits into service-line reporting for foot and ankle care. The publication outlines benchmarks where available and identifies gaps: Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, and related codes.
What readers will learn: concise clinical description of the procedure coded by 28088, payer coverage landscape, typical billing considerations for surgical synovectomy of the foot, and where to look for additional coding and policy guidance.
Billing Code Overview
CPT code 28088 describes a synovectomy of the extensor tendon sheath of the foot, a surgical procedure in which the provider removes inflamed or diseased synovium from the extensor tendon sheath to relieve pain and restore function. The procedure targets pathological synovial tissue surrounding the extensor tendons of the foot.
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Service type: Surgical soft-tissue procedure of the foot involving removal of diseased synovium
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Typical site of service: Outpatient surgical center or hospital operating room, depending on patient condition and surgical setting
Clinical & Coding Specifications
Clinical Context
A 48-year-old patient presents to a podiatry/orthopedic clinic with several months of dorsal-foot pain and swelling localized to the extensor tendon sheaths over the metatarsal region. Conservative care including oral anti-inflammatory medication, activity modification, splinting, and corticosteroid injection provided limited or transient relief. Imaging (ultrasound or MRI) demonstrates synovial hypertrophy and fluid within the extensor tendon sheath consistent with chronic tenosynovitis. The patient is scheduled for operative synovectomy of the extensor tendon sheath to remove inflamed synovium and relieve mechanical pain. The procedure is typically performed in an ambulatory surgical center or hospital outpatient department under regional block or general anesthesia. Preoperative workflow includes focused history and physical, documentation of failed conservative measures, informed consent, pre-op anesthesia assessment, and marking of the operative site. Intraoperative documentation should state the exact anatomic location (e.g., extensor digitorum longus sheath over the second and third digits), extent of synovectomy, hemostasis, and any concomitant procedures. Postoperative care includes dressing changes, weight-bearing instructions, analgesia plan, and a return-to-activity timeline; follow-up visit documents wound healing and range-of-motion recovery.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the synovectomy required substantially greater work or operating time than typical due to extensive disease or unexpected complexity |