revision process for ICD-11, 6, 10, 11–12
use of ICD-9-CM and ICD-10 codes, 12, 16, 22, 
23, 29
International Classification of Functioning, 
Disability and Health (ICF), 21, 734
International Classification of Sleep Disorders,  2nd 
Edition (ICSD-2), relationship of DSM-5 to, 
361–362
circadian rhythm sleep-wake disorders, 398
hypersomnolence disorder, 372
insomnia disorder, 368
narcolepsy, 378
nightmare disorder, 407obstructive sleep ap nea hypopnea, 383
rapid eye movement sleep behavior disorder, 
410
restless legs syndrome, 413
sleep-related hypoventilation, 390
substance/medication-induced sleep disorder, 
420
Internet gaming disorder, 795–798
associated features supporting diagnosis of, 
797
comorbidity with, 798
diagnostic features of, 796–797
differential diagnosis of, 797–798
functional consequences of, 797
prevalence of, 797
proposed criteria for, 795–796
risk and prognostic factors for, 797
subtypes of, 796
Intoxication, 481, 485–487
alcohol, 497–499
associated with use of multiple substances, 486
caffeine, 503–506
cannabis, 516–517
delirium due to, 598
development and course of, 487
duration of effects and, 486
inhalant, 538–540
laboratory findings associated with, 486–487
opioid, 546–547