F51.8
Other sleep disorders not due to a substance or known physiological condition
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 2 never code together
Instructional notes 1
F01-F99chapter
Includes
- disorders of psychological development
Index entries leading here 2
Alongside this code 6 same parent — F51
F51.0 Insomnia not due to a substance or known physiol condition category F51.1 Hypersomnia not due to a substance or known physiol cond category F51.3 Sleepwalking [somnambulism] F51.4 Sleep terrors [night terrors] F51.5 Nightmare disorder F51.9 Sleep disorder not due to a sub or known physiol cond, unsp
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.