ICD-10-CM Code Lookup — Plain English

Free lookup for all 98,186 ICD-10-CM diagnosis codes. Search by code or condition. Every code explained in plain English. FY 2026 current, updated annually from official CMS and CDC publications.

Most searched codes

I10 Essential (primary) hypertension E11.9 Type 2 diabetes mellitus without complications J06.9 Acute upper respiratory infection, unspecified M54.50 Low back pain, unspecified F32.1 Major depressive disorder, single episode, moderate Z23 Encounter for immunization I25.10 Atherosclerotic heart disease of native coronary artery without angina pectoris I50.9 Heart failure, unspecified E78.5 Hyperlipidemia, unspecified J44.1 Chronic obstructive pulmonary disease with acute exacerbation F41.1 Generalized anxiety disorder N39.0 Urinary tract infection, site not specified

Browse by chapter

Ch.1: Infectious and parasiticCh.2: NeoplasmsCh.3: Blood and immuneCh.4: Endocrine, nutritional andCh.5: Mental and behavioralCh.6: Diseases of theCh.7: Diseases of theCh.8: Diseases of theCh.9: Diseases of theCh.10: Diseases of theCh.11: Diseases of theCh.12: Diseases of theCh.13: Diseases of theCh.14: Diseases of theCh.15: Pregnancy, childbirth andCh.16: Perinatal conditionsCh.17: Congenital malformationsCh.18: Symptoms and abnormalCh.19: Injury, poisoning andCh.20: External causes ofCh.21: Factors influencing health

What is an ICD-10 code?

ICD-10-CM is the official system US healthcare providers use to classify diagnoses on medical claims. Every time a doctor bills your insurance, they attach an ICD-10 code.

If you received an Explanation of Benefits (EOB) and wondered what codes like I10 or E11.9 mean — this site translates them into plain English. Our database contains all 98,186 FY 2026 codes sourced from CMS.gov and the CDC.

Designed and Developed by StormGlass Interactive Inc. · ICD-10-CM data from CMS.gov and CDC NCHS · Updated annually October 1