Evidence Checklist: Narcolepsy

Multiple Sleep Latency Test (MSLT) with SOREMPsCritical

An MSLT showing mean sleep onset latency of 8 minutes or less and at least 2 sleep-onset REM periods (SOREMPs). This is the gold standard diagnostic test required to confirm narcolepsy.

Overnight polysomnography preceding the MSLTCritical

A full-night polysomnography confirming adequate sleep opportunity and ruling out other sleep disorders, performed the night before the MSLT.

Nexus opinion linking narcolepsy to service ("at least as likely as not")Critical

Medical opinion connecting narcolepsy to an in-service TBI, autoimmune trigger, or other service event. Head trauma is the most common service-related cause.

Treatment records (modafinil, sodium oxybate, stimulants)

Prescription records for wake-promoting agents and records of treatment response or inadequate control of daytime sleepiness.

Documentation of cataplexy episodes (if Type 1)

Records or personal diary documenting sudden muscle weakness triggered by strong emotions. Cataplexy confirms narcolepsy Type 1 and may support a higher rating.

Documentation of employment and driving impact

Records showing inability to safely drive, missed work, job changes, or restrictions on activities requiring sustained alertness.

Buddy statement from spouse, family, or fellow service member

A written statement from someone who can describe observable symptoms and how your condition affects daily life.

Completed DBQ NarcolepsyCritical

VA standardized form for narcolepsy capturing sleep study results, cataplexy, and functional impact for rating under DC 8108.

Service treatment records (STRs)Critical

Military medical records showing in-service treatment, complaints, or injuries related to this condition.