ICD-10-CM · Chapter 5 · F01-F99
F51 Sleep disorders not due to a substance or known physiological condition
Excludes 2 (not included here)
- organic sleep disorders (G47.-)
Subcodes
Each subcode links to a detail page with full clinical annotations.
| Code | Description | Billable |
|---|---|---|
| F51..0 | Insomnia not due to a substance or known physiological condition | No |
| F51..01 | Primary insomnia | Yes |
| F51..02 | Adjustment insomnia | Yes |
| F51..03 | Paradoxical insomnia | Yes |
| F51..04 | Psychophysiologic insomnia | Yes |
| F51..05 | Insomnia due to other mental disorder | Yes |
| F51..09 | Other insomnia not due to a substance or known physiological condition | Yes |
| F51..1 | Hypersomnia not due to a substance or known physiological condition | No |
| F51..11 | Primary hypersomnia | Yes |
| F51..12 | Insufficient sleep syndrome | Yes |
| F51..13 | Hypersomnia due to other mental disorder | Yes |
| F51..19 | Other hypersomnia not due to a substance or known physiological condition | Yes |
| F51..3 | Sleepwalking [somnambulism] | Yes |
| F51..4 | Sleep terrors [night terrors] | Yes |
| F51..5 | Nightmare disorder | Yes |
| F51..8 | Other sleep disorders not due to a substance or known physiological condition | Yes |
| F51..9 | Sleep disorder not due to a substance or known physiological condition, unspecified | Yes |
Last reviewed: September 2026