Hypersomnia not due to a substance or known physiological condition

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 4 more specific codes instead:

F51.11 Primary hypersomnia
F51.12 Insufficient sleep syndrome
F51.13 Hypersomnia due to other mental disorder
F51.19 Other hypersomnia not due to a substance or known physiological condition

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

FY2012 Added to the draft code set draft Hypersomnia not due to a substance or known physiological condition

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from F51 Sleep disorders not due to a substance or known physiological condition

Excludes2 - not included here

organic sleep disorders (G47.-)

Codes in the same group

Code	Description	Status
F51.0	Insomnia not due to a substance or known physiological condition	Not billable
F51.3	Sleepwalking [somnambulism]	Valid
F51.4	Sleep terrors [night terrors]	Valid
F51.5	Nightmare disorder	Valid
F51.8	Other sleep disorders not due to a substance or known physiological condition	Valid
F51.9	Sleep disorder not due to a substance or known physiological condition, unspecified	Valid