F51.5
F51.5: Nightmare disorder
Billable / specific codeICD-10-CM
F51.5 is a billable, specific ICD-10-CM code for nightmare disorder. It is valid for submission on a claim.
Check F51.5 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Dream anxiety disorder
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
F51.5 is named in 11 Medicare coverage policies: 9 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which one applies depends on your Medicare contractor.
- A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
- A56865Billing and Coding: Psychiatric Inpatient Hospitalizationnot covered
- A56923Billing and Coding: Outpatient Sleep Studies
- A56995Billing and Coding: Polysomnography
Alphabetic index entries that lead here
- Nightmares(REM sleep type)
- Disorder›dream anxiety
- Disorder›nightmare
- Disorder›sleep›nightmares
Code history
Unchanged in every release from FY2024 to FY2027.
Other codes under F51
- F51.0Insomnia not due to a substance or known physiological condition
- F51.1Hypersomnia not due to a substance or known physiological condition
- F51.3Sleepwalking [somnambulism]
- F51.4Sleep terrors [night terrors]
- F51.8Other sleep disorders not due to a substance or known physiological condition
- F51.9Sleep disorder not due to a substance or known physiological condition, unspecified