"Neuropsychiatric" refers to something related to both the brain (neuro) and mental health (psychiatric). It describes conditions or illnesses that affect both the brain and behavior.
A family history study of neuropsychiatric disorders in the adult siblings of autistic individuals (cambridge.org)
Conditions such as economic strife, health problems, drug abuse, pollution, and lack of parental care experienced during early life can have a permanent effect on an individual's fitness, increasing the risk for and rate of neuropsychiatric disorders in these individuals when they become adults. (genestogenomes.org)
Validation of the candidate risk gene for neuropsychiatric disease CACNA1C using a mouse ENU mutagenesis screen. (ibangs.org)