Free medical coding reference. Look up the latest ICD-10-CM diagnosis codes, ICD-10-PCS procedure codes, HCPCS Level II, ICD-11, and legacy ICD-9-CM code sets. Pick a set to search codes, read official descriptions, includes/excludes notes, and track yearly code changes.
Inpatient procedure codes for hospital billing. Covers surgeries, diagnostics, and treatments.
Diagnosis codes for all healthcare settings. The standard for medical coding in the United States.
Supplies, equipment, and outpatient services. Essential for durable medical equipment and non-physician services.
Legacy diagnosis and procedure codes. Retired but still referenced for historical data and crosswalks.
The next generation WHO classification system. New hierarchical structure with modern clinical concepts.
A look at code volume and real usage across the library. Full analytics dashboard →
Latest published year for each set.
What visitors actually look up.
The 22 clinical chapters, by number of codes inside.
Always remember the 7th character! 'A' for initial encounter, 'D' for subsequent, and 'S' for sequela. And watch your step around ponds.
Slot ID: HP-MAIN-HERO
The database will be undergoing maintenance on Sunday at 02:00 UTC. Expect 5 minutes of downtime.
New clinical inclusion terms have been added to this code for the 2026 revision.
We have officially updated all datasets for the 2026 fiscal year, including ICD-10-CM, PCS and HCPCS-II.
CMS has released updated guidelines for 2026 diagnosis coding regarding social determinants of health.
Need help finding a specific code or understanding the hierarchy? Use the search tool on any code set page.
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