Glossary of Health Care and Medical Terms
In many cases,
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ICD-9 is International Classification of Diseases, Ninth Revision. It is a procedure and diagnosis coding system.
Claims for all services and hospital inpatient procedures provided before the ICD-10 compliance date must use ICD-9 / ICD-9-CM codes.
Also see: ICD, ICD-10, ICD-9-CM
International Classification of Diseases, Ninth Revision, Clinical Modification.