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F51.5

Nightmare disorder

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 2 never code together
F51code
Excludes2
  • organic sleep disorders (G47.-)G47.-
F01-F99chapter
Excludes2
  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)R00-R99

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 2
F51.5code
Inclusion terms
  • Dream anxiety disorder
F01-F99chapter
Includes
  • disorders of psychological development
Index entries leading here 2
  • Disorder (of) — see also Disease
  • Nightmares (REM sleep type) F51.5
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] F51.8 Oth sleep disord not due to a sub or known physiol cond F51.9 Sleep disorder not due to a sub or known physiol cond, unsp
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
F51
Block
F50-F59
Siblings
6

Present FY2024–FY2027.