CPT code 28400 represents the closed treatment of a calcaneal (heel bone) fracture without manipulation or open surgery. This code captures nonoperative orthopedic management of heel fractures—an important category of musculoskeletal care that affects trauma, emergency, and orthopedic practice nationally. Proper coding of closed calcaneal fracture treatment influences claims processing, site-of-service classification, and aggregate utilization measures across payers.

Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for closed calcaneal fracture management, expected sites of care, and typical service characterization. The publication covers benchmark considerations, common modifier usage where applicable, and policy and coverage factors that affect reimbursement and authorization for nonoperative fracture treatment. It contextualizes CPT code 28400 within orthopedic service lines and highlights issues relevant to hospital, ambulatory surgery, and emergency settings.

This national-level summary is intended for coding professionals, revenue cycle staff, and policy analysts seeking a concise reference on what CPT code 28400 denotes, why it matters in clinical and billing workflows, and what policy and payer factors commonly affect its adjudication.