Other Specified Hypersomnolence Disorder 421
insomnia disorder category is used in situations in which the clinician chooses not to specify
the reason that the criteria are not met for insomnia disorder or a specific sleep-wake dis-
order, and includes presentations in which there is insufficient information to make a more
specific diagnosis.
Other Specified Hypersomnolence Disorder
780.54 (G47.19)
This category applies to presentations in which symptoms characteristic of hypersomno-
lence disorder that cause clinically signific ant distress or impairment in social, occupation-
al, or other important areas of functioning predominate but do not meet the full criteria for
hypersomnolence disorder or any of the disorders in the sleep-wake disorders diagnostic
class. The other specified hypersomnolence disorder category is used in situations in
which the clinician chooses to communicate the specific reason that the presentation does
not meet the criteria for hypersomnolence diso rder or any specific sleep-wake disorder.
This is done by recording “other specified hypersomnolence disorder” followed by the spe-
cific reason (e.g., “brief-duration hyperso mnolence,” as in Kleine-Levin syndrome).
Unspecified Hypersomnolence Disorder
780.54 (G47.10)
This category applies to presentations in which symptoms characteristic of hypersomno-
lence disorder that cause clinically signific ant distress or impairment in social, occupation-
al, or other important areas of functioning predominate but do not meet the full criteria for
hypersomnolence disorder or any of the disorders in the sleep-wake disorders diagnostic
class. The unspecified hypersomnolence disorder category is used in situations in which
the clinician chooses not to specify the reason that the criteria are not met for hypersom-