ICD-10-CM › F01-F99 › F50-F59 › F51 Sleep disorders not due to a... › F51.5
Nightmare disorder
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Nightmare disorder
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from F51 Sleep disorders not due to a substance or known physiological condition
Excludes2 - not included here
- organic sleep disorders (G47.-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Dyssomnia
- Nightmares
- Disorder > nightmare
- Disorder > dream anxiety
- Disorder > sleep > nightmares
Codes in the same group
| Code | Description | Status |
|---|---|---|
| F51.0 | Insomnia not due to a substance or known physiological condition | Not billable |
| F51.1 | Hypersomnia not due to a substance or known physiological condition | Not billable |
| F51.3 | Sleepwalking [somnambulism] | Valid |
| F51.4 | Sleep terrors [night terrors] | Valid |
| F51.8 | Other sleep disorders not due to a substance or known physiological condition | Valid |
| F51.9 | Sleep disorder not due to a substance or known physiological condition, unspecified | Valid |