CPT code 28020 denotes surgical incision and drainage of a foot joint or the joint connecting the foot and ankle to identify infection sources and evacuate fluid and debris. Nationally, this code is relevant for orthopedic and podiatric surgical services addressing septic or purulent joint conditions in the lower extremity. It has implications for acute care pathways, hospital resource use, and inpatient versus outpatient surgical decision-making.

Key payers considered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context for when the procedure is used, typical sites of service, and the procedural focus on diagnostic exploration and drainage. The publication provides benchmarking and utilization context, payer coverage considerations, and relevant policy or coding updates that affect billing and claims adjudication. The material is intended to inform hospital coders, clinicians, and policy analysts about the code's clinical intent, common use cases, and areas where payer policies commonly influence site-of-service determination and reimbursement.