Obsessive-compulsive and related disorder due to another medical condition. If the
obsessive-compulsive and relate d disorder symptoms are attr ibutable to another medical
condition (i.e., rather than to the medication taken for the other me dical condition), obses-
sive-compulsive and related di sorder due to another medical condition should be diag-
nosed. The history often provides the basis for judgment. At times, a change in the
treatment for the other medical condition (e.g ., medication substitu tion or discontinua-
tion) may be needed to determine whether or not the medication is the causative agent (in
which case the symptoms may be better expl ained by substance/medication-induced ob-
sessive-compulsive and related diso rder). If the disturbance is attributable to both another
medical condition and substance use, both diagnoses (i.e., obsessive-compulsive and related
disorder due to another medical condition and substance/medicati on-induced obsessive-
compulsive and related disorder) may be given. When there is insufficie nt evidence to de-
termine whether the symptoms are attributable  to either a substanc e/medication or an-
other medical condition or are primary (i.e., a ttributable to neither a substance/medication
nor another medical condition), a diagnosis of other specified or unspecified obsessive-
compulsive and related disorder would be indicated.
Delirium. If obsessive-compulsive and related disorder symptoms occur exclusively
during the course of delirium, they are consid ered to be an associated  feature of the delir-
ium and are not diagnosed separately. 
Obsessive-Compulsive and Related Disorder
Due to Another Medical Condition
Diagnostic Criteria 294.8 (F06.8)