ICD-9-CM Lookup
ICD-9-CM: Legacy Diagnostic Coding System and Its Transition to ICD-10
The ICD-9-CM (International Classification of Diseases, 9th Revision, Clinical Modification) was a coding system maintained by the Centers for Medicare and Medicaid Services (CMS). It was widely used for assigning diagnostic codes to inpatient, outpatient, and physician office services. ICD-9-CM codes typically consisted of three to five numeric characters, with exceptions like V codes, E codes, and M codes, which began with a single letter.
However, the ICD-9-CM system faced significant limitations. Its lack of specificity made it difficult to assign precise diagnoses, compare costs, treatments, and healthcare technologies. As a result, the ICD-9 code set was officially deprecated and replaced by ICD-10 codes on September 30, 2015, offering greater detail and accuracy for modern medical needs.
The final version of ICD-9-CM included 14,567 diagnostic codes, organized into 20 different categories. These categories encompassed a broad range of conditions and medical scenarios, but the system's constraints necessitated the transition to ICD-10 for improved healthcare documentation and analysis.
Browse ICD-9-CM Codes
- Infectious and parasitic diseases
- Neoplasms
- Endocrine, nutritional and metabolic diseases, and immunity disorders
- Diseases of the blood and blood-forming organs
- Mental disorders
- Diseases of the nervous system
- Diseases of the sense organs
- Diseases of the circulatory system
- Diseases of the respiratory system
- Diseases of the digestive system
- Diseases of the genitourinary system
- Complications of pregnancy, childbirth, and the puerperium
- Diseases of the skin and subcutaneous tissue
- Diseases of the musculoskeletal system and connective tissue
- Congenital anomalies
- Certain conditions originating in the perinatal period
- Symptoms, signs, and ill-defined conditions
- Injury and poisoning
- External causes of injury
- Supplementary classification of factors influencing health status and contact with health services