How Do You Look up Medical Diagnosis Codes?


Quick Answer

Look up medical diagnosis codes at CMS.gov, according to the Centers for Medicare & Medicaid Services. The site's search function allows users to input keywords to find a diagnosis code or input a code to find the associated diagnosis.

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Full Answer

When a patient enters the medical diagnosis code in the search box, the Centers for Medicare & Medicaid Services site returns a brief description. The user can then click on the code number next to the brief description, and a pop-up text box provides more information about the condition.

Several other websites also provide lists of medical diagnosis codes, including ICD9Data.com. On ICD9Data.com, lists are broken down into categories such as Infectious and Parasitic Diseases, with codes ranging from 001 to 139, or Diseases of the Blood and Blood-Forming Organs, with codes ranging from 280 to 289. When a user clicks on a code number range, those categories are broken down further, such as codes from 001 to 009 referring to Intestinal Infectious Diseases. Many of the individual code numbers are broken down further. For example, code 245 covers all types of thyroiditis, while code 245.1 indicates subacute thyroiditis.

As of Oct. 1 2015, all health care providers and health plans in the country must start using an updated set of codes, known as ICD-10-CM/PCS. ICD9Data.com contains a link for converting the old ICD-9 codes to the new codes.

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