R40.0
BillableSomnolence
R40.0 is the ICD-10-CM code for Somnolence. It is a billable, specific code valid for reimbursement.
R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Includes
- •Drowsiness
Excludes1 — not coded here
- •coma (R40.2-)
Frequently asked questions
- What is ICD-10 code R40.0?
- R40.0 is the ICD-10-CM code for "Somnolence". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
- Is R40.0 a billable code?
- Yes — R40.0 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from R40.0?
- Excludes1 (not coded here): coma (R40.2-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition