G47.5Parasomnia

G47.5 is the ICD-10-CM diagnosis code for parasomnia. It belongs to category G47 (sleep disorders), block G40-G47 (episodic and paroxysmal disorders) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within G47 (sleep disorders), G47.5 is specifically for parasomnia. Related codes cover insomnia (G47.0), hypersomnia (G47.1), circadian rhythm sleep disorders (G47.2), sleep apnea (G47.3), Narcolepsy and cataplexy (G47.4), sleep related movement disorders (G47.6), other sleep disorders (G47.8) and sleep disorder, unspecified (G47.9).

To report this condition, pick the subcode that matches the documentation: G47.50 (unspecified), G47.51 (arousals), G47.52 (disorder), G47.53 (paralysis), G47.54 (in conditions classified elsewhere) and G47.59 (parasomnia).

Don't report G47.5 together with the conditions in its Excludes1 note: alcohol induced parasomnia (F10.182, F10.282, F10.982), drug induced parasomnia (F11.182, F11.282, F11.982, F13.182, F13.282, F13.982, F14.182, F14.282, F14.982, F15.182, F15.282, F15.982, F19.182, F19.282, F19.982) and parasomnia not due to a substance or known physiological condition (F51.8).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.