ICD10Data.com is a free reference website designed for the fast lookup of all current American ICD-10-CM (diagnosis) and ICD-10-PCS (procedure) medical billing codes. The 2026 ICD-10-CM/PCS code sets are now fully loaded on ICD10Data.com. 2026 codes became effective on , therefore all claims with a date of service on or after this date should use 2026 codes.
Search the current list of American ICD-10-CM diagnosis codes with our free lookup tools. Find codes by name, descriptions or clinical terms.
ICD-10-CM—the International Classification of Diseases, Tenth Revision, Clinical Modification—is used to code and classify medical diagnoses. ICD-10-CM is based on ICD-10, the system used to code and classify mortality data from death certificates. Use our free tool to search for ICD-10-CM codes.
CMS guide to ICD-10 coding for diagnosis and procedures, including code set resources, quarterly updates, and implementation requirements for providers.
Use Codify by AAPC for ICD-10 code lookup, medical coding reference, online ICD-10-CM codes search, Diagnosis Codes guidelines, lay terms and many more.
Chapter index for the 2025 version of the ICD-10 Clinical Modification specification. Browse the specification's chapters, sections, and diagnosis codes, along with each code's billable status, notations, version history, and more.
2026 ICD-10-CM Codes A00-B99 Certain infectious and parasitic diseases C00-D49 Neoplasms D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism E00-E89
The number of diagnosis codes has expanded from 13,000 ICD-9 codes to 68,000 ICD-10 codes, with 78 percent of ICD-9 diagnosis codes mapping 1-to-1 with an ICD-10 code, either exactly or approximately.