F51.5

Nightmare disorder

Billable / specific

F51.5 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Applicable to

  • Dream anxiety disorder

Includes (from F51)

  • disorders of psychological development

Excludes2

Not included here — may be reported together when both conditions exist.

  • symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99) (from F51)
  • organic sleep disorders (G47.-) (from F51)

Also known as

  • Dream anxiety disorder
  • Disorder, dream anxiety
  • Disorder, nightmare
  • Disorder, sleep, nightmares
  • Nightmares

Parent code

  • F51Sleep disorders not due to a substance or known physiological conditionHeader

Related codes

  • F51.0Insomnia not due to a substance or known physiological conditionHeader
  • F51.1Hypersomnia not due to a substance or known physiological conditionHeader
  • F51.3Sleepwalking [somnambulism]Billable
  • F51.4Sleep terrors [night terrors]Billable
  • F51.8Other sleep disorders not due to a substance or known physiological conditionBillable
  • F51.9Sleep disorder not due to a substance or known physiological condition, unspecifiedBillable

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