ICD-10 Code
The international code your clinician puts on visits and prescriptions.
ICD-10 (International Classification of Diseases, 10th revision) is the coding system used for diagnoses on every claim and prescription in the U.S. The code tells the pharmacy and insurer why a medication was prescribed; the wrong code is a common reason a refill gets denied.
Medically reviewed by Dr. Ikechukwu Ogbu, MD
MD · Board-Certified, Internal Medicine · Last reviewed June 2026