Billing for urgent care services involves managing the coding, claim submission, and reimbursement process for walk-in clinics that provide immediate, non-emergency medical care. Since urgent care centers treat a wide range of conditions—from minor injuries and infections to diagnostic tests and X-rays—billing requires accurate use of CPT, ICD-10, and HCPCS codes, along with proper place-of-service codes (such as POS 20 for urgent care facilities). These services must also address challenges like multiple payer contracts, varying reimbursement rates, and high patient volumes.