Summary & Overview
CPT 28530: Closed Treatment of Sesamoid Bone Fracture, Foot
CPT code 28530 denotes the closed treatment of a sesamoid bone fracture in the foot, a focused orthopedic procedure used to manage small bone fractures beneath the great toe without open surgery. Nationally, this code is relevant for orthopedic, podiatry, and emergency care billing where nonoperative management of sesamoid injuries is performed. The code matters because accurate coding ensures appropriate payment for a procedure that can vary in setting from clinic procedure rooms to hospital outpatient departments and ambulatory surgery centers.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication outlines typical clinical context for the procedure, expected sites of service, and payer coverage scope. Readers will find benchmarks on utilization and reimbursement patterns, common billing modifiers and considerations, and guidance on documentation elements tied to the clinical description. The summary also covers coding relationships and places the procedure within the broader service line of foot and ankle fracture management.
This resource is intended for coding professionals, billing managers, and clinical staff who need concise, national-level context for CPT code 28530, helping ensure correct claim submission and alignment with payer expectations.
Billing Code Overview
CPT code 28530 describes the closed treatment of a sesamoid bone fracture of the foot. The procedure addresses fractures of small sesamoid bones, most commonly located beneath the head of the first metatarsal on the underside of the great toe, by manipulating bony fragments without an open surgical incision.
Service type: Closed fracture treatment / foot fracture management
Typical site of service: Hospital outpatient department, ambulatory surgery center, or orthopedic clinic procedure room
Clinical & Coding Specifications
Clinical Context
A 42-year-old recreational soccer player presents to an orthopedic urgent care clinic after pivoting on the forefoot during play and feeling acute pain beneath the great toe. Physical exam reveals focal tenderness under the first metatarsophalangeal joint over the sesamoid complex, swelling, and pain with passive dorsiflexion of the hallux. Weight-bearing and non–weight-bearing foot radiographs demonstrate a nondisplaced fracture of a sesamoid bone. The patient is consented for closed treatment involving immobilization and closed reduction techniques as indicated, performed in the clinic or ambulatory surgery center.
Clinical workflow:
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Initial evaluation by an orthopedic surgeon or podiatrist with history, focused foot exam, and imaging (radiographs; consider advanced imaging if concern for bipartite sesamoid or nondisplaced occult fracture).
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Decision for closed treatment (
28530) when fracture is nondisplaced or reducible without open surgery. -
Procedure performed under local anesthesia, regional block, or monitored anesthesia care depending on patient factors and site of service. Closed manipulation and immobilization (e.g., walking boot, cast, or cast shoe) are applied. Post-procedure radiographs confirm alignment.
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Post-procedure instructions, pain management, weight-bearing status, and follow-up arranged with repeat imaging and potential referral to physical therapy for gait and toe mobilization once healing permits.
Coding Specifications
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