F51.5 Nightmare disorder
ICD-10-CM · CMS code reference
Official ICD-10-CM description: Nightmare disorder
Related codes
F51.01Primary insomnia ICD-10-CMF51.02Adjustment insomnia ICD-10-CMF51.03Paradoxical insomnia ICD-10-CMF51.04Psychophysiologic insomnia ICD-10-CMF51.05Insomnia due to other mental disorder ICD-10-CMF51.09Other insomnia not due to a substance or known physiological condition ICD-10-CMF51.11Primary hypersomnia ICD-10-CMF51.12Insufficient sleep syndrome ICD-10-CM
Common questions
Is F51.5 a billable code?
Yes. F51.5 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.