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The American Hospital Association's Central Office serves as the official U.S. Clearinghouse on medical coding for the proper use of the ICD-9-CM, ICD-10-CM and ICD-10-PCS systems and Level I HCPCS (CPT-4 codes) for hospital providers and certain Level II HCPCS codes for hospitals, physicians and other health professionals.

Please use this website to send and track questions that have been submitted online. All official answers will continue to be provided in writing and mailed to your organization.