Coding Clinic Quizzes | AHA Central Office The American Hospital Association's Central Office serves as the U.S. Official Clearinghouse on medical coding for the proper use of the ICD-9-CM systems and Level I HCPCS (CPT-4 codes) for hospitals and certain Level II HCPCS codes. Codingclinicquiz.org~Site InfoWhoisTrace RouteRBL Check
