Medical Codes Directory
Understand standardized medical, diagnostic, and procedure codes in plain language. Each code page explains what it identifies, when it is used, and what it means for patients.
Code systems
Browse codes by their classification system.
ICD-10
International Classification of Diseases, 10th Revision — the standard diagnostic coding system used worldwide for classifying diseases, injuries, and conditions in clinical and billing records.
LOINC
Logical Observation Identifiers Names and Codes — the universal standard for identifying lab tests, clinical observations, and survey questions.
SNOMED CT
Systematized Nomenclature of Medicine — Clinical Terms. The most comprehensive clinical terminology covering diagnoses, findings, procedures, body structures, and more.
CPT / HCPCS
Current Procedural Terminology and Healthcare Common Procedure Coding System — codes that describe medical procedures, services, and supplies for billing and documentation.