G47.0Insomnia

G47.0 is the ICD-10-CM diagnosis code for insomnia. 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 3 subcodes must be used instead.

Within G47 (sleep disorders), G47.0 is specifically for insomnia. Related codes cover hypersomnia (G47.1), circadian rhythm sleep disorders (G47.2), sleep apnea (G47.3), Narcolepsy and cataplexy (G47.4), parasomnia (G47.5), 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: G47.00 (unspecified), G47.01 (due to medical condition) and G47.09 (insomnia).

The conditions in its Excludes2 note aren't part of G47.0, but may be coded alongside it if the patient has both: alcohol related insomnia (F10.182, F10.282, F10.982), drug-related insomnia (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), idiopathic insomnia (F51.01), insomnia due to a mental disorder (F51.05) and 4 more.

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