HCPCS codes consist of how many letter(s) followed by how many number(s)?

HCPCS codes are structured with one letter followed by four numbers. The HCPCS (Healthcare Common Procedure Coding System) is divided into two levels. Level I comprises CPT codes, which are numeric and used for procedures and services, while Level II codes consist of one letter followed by four digits, specifically assigned to non-physician services, medical equipment, and supplies. The letter denotes a particular category such as A for ambulance services or J for drugs administered other than oral methods, while the four numbers provide a unique identifier within that category. Understanding this structure is crucial for properly coding and billing healthcare services and ensures that providers receive appropriate reimbursements.