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Diagnosis information
Core diagnostic criteria, specifiers, differential considerations, and documentation support in one open, scan-friendly view.
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Core criterion A
Recurrent periods of irrepressible need to sleep, lapsing into sleep, or napping within same day, for ≥3 months; ≥1 of: cataplexy (brief episodes of bilateral muscle tone loss) ≥few times/month; hypocretin deficiency (CSF hypocretin-1 ≤110 pg/mL); REM sleep latency ≤15 min on MSLT (or mean sleep latency ≤8 min with ≥2 sleep-onset REM periods)
Consistent with [Narcolepsy] [specifier(s)]. For at least three months, there have been recurrent episodes of an irrepressible need to sleep; lapses into sleep; sudden daytime sleep episodes, forming a pattern meeting the threshold for narcolepsy. The presentation is further characterised by cataplexy; recurrent intrusions of REM-related phenomena including sleep paralysis; hypnagogic or hypnopompic hallucinations, and distinctive sleep architecture changes, including REM latency ≤15 minutes on PSG or low CSF hypocretin-1 concentration, where applicable. These symptoms have resulted in clinically significant distress or impairment, and the disturbance is not better explained by insufficient sleep, circadian rhythm disorders, obstructive sleep apnoea, other medical or neurological illness, or substance/medication effects.
Adapt this supplied template to the assessment. It is not a substitute for diagnostic reasoning or local documentation requirements.