ICD-10 Code for Somnolence
The ICD-10-CM code for somnolence is R40.0 — Somnolence. This is the code the Alphabetic Index gives for somnolence with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
Billable
Which somnolence code should you use?
The Alphabetic Index lists 2 codes under Somnolence. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| nonorganic origin | F51.11 | Primary hypersomnia |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources