Sleepwalking [somnambulism]

This code signifies a parasomnia characterized by recurrent episodes of complex motor behaviors initiated during slow-wave sleep, typically without full consciousness or memory of the event upon awakening. Individuals may perform activities ranging from sitting up in bed to walking, talking, or even engaging in more complex tasks while asleep.

Apply this code when documentation clearly indicates a diagnosis of somnambulism or sleepwalking, confirmed by clinical assessment or polysomnography. This is appropriate for patients experiencing episodes of ambulation or other complex behaviors during sleep.

• Differentiate from other parasomnias like night terrors (F51.8) or REM sleep behavior disorder (G47.52), which have distinct clinical presentations.
• Ensure documentation specifies the nature of the sleep-related behaviors and their occurrence during sleep.
• Consider co-occurring sleep disorders or underlying medical conditions that might contribute to or exacerbate sleepwalking.