|CD-9-CM. The name of the substance/medication-induced neurocognitive disorder be- gins with the specific substance/medication (e.g., alcohol) that is presumed to be causing the neurocognitive symptoms. The diagnostic code is selected from the table included in the criteria set, which is based on the drug class. For substances that do not fit into any of the classes, the code for “other substance” should be used; and in cases in which a substance is judged to be an etiological factor but the specific class of substance is unknown, the cat— egory ”unknown substance” should be used.
The name of the disorder (i.e., [specific substance]-induced major neurocognitive dis- order or [specific substance]-induced mild neurocognitive disorder) is followed by the type in the case of alcohol (i.e., nonamnestic-confabulatory type, amnestic-confabulatory type), followed by specification of duration (i.e., persistent). Unlike the recording procedures for ICD-IO-CM, which combine the substance/medication-induced disorder and sub- stance use disorder into a single code, for ICD-9-CM a separate diagnostic code is given for the substance use disorder. For example, in the case of persistent amnestic-confabulatory symptoms in a man with a severe alcohol use disorder, the diagnosis is 291.1 alcohol- induced major neurocognitive disorder, amnestic-confabulatory type, persistent. An addi- tional diagnosis of 303.90 severe alcohol use disorder is also given. If the substance/medi- (e.g., after a sporadic heavy use of inhalants), no accompanying substance use disorder is noted (e.g., 292.82 inhalant-induced mild neurocognitive disorder).
lCD-10-CM. The name of the substance/medication-induced neurocognitive disorder begins with the specific substance (e.g., alcohol) that is presumed to be causing the neuro- cognitive symptoms. The diagnostic code is selected from the table included in the criteria set, which is based on the drug class and presence or absence of a comorbid substance use disorder. For substances that do not fit into any of the classes, the code for ”other sub- stance” should be used; and in cases in which a substance is judged to be an etiological fac- tor but the specific class of substance is unknown, the category "unknown substance" should be used.
When recording the name of the disorder, the comorbid substance use disorder (if any) is listed first, followed by the word "with,” followed by the name of the disorder (i.e., [specific neurocognitive disorder), followed by the type in the case of alcohol (i.e., nonamnestic-con- fabulatory type, amnestic-confabulatory type), followed by specification of duration (i.e., persistent). For example, in the case of persistent amnestic-confabulatory symptoms in a man with a severe alcohol use disorder, the diagnosis is F1026 severe alcohol use disorder with alcohol-induced major neurocognitive disorder, amnestic-confabulatory type, persis- tent. A separate diagnosis of the comorbid severe alcohol use disorder is not given. If the order (e.g., after a sporadic heavy use of inhalants), no accompanying substance use disor- der is noted (e.g., F18.988 inhalant-induced mild neurocognitive disorder).