R40
Header — not billableSomnolence, stupor and coma
The ICD-10 code for somnolence, stupor and coma is R40.
R40 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 5 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- R41Other symptoms and signs involving cognitive functions and awarenessnon-billable header
- R42Dizziness and giddiness
- R43Disturbances of smell and tastenon-billable header
- R44Other symptoms and signs involving general sensations and perceptionsnon-billable header
- R45Symptoms and signs involving emotional statenon-billable header
- R46Symptoms and signs involving appearance and behaviornon-billable header
- R40Somnolence, stupor and comanon-billable header