Onset must be before age of 10 yrs, with developmental age of younger than 6 yrs
The diagnosis of DMDD must be made while considering the presence or absence of multiple other conditions
DSMM is not episodic conditions, hence, the diagnosis cannot be assigned to a child who has ever experienced a full duration hypomanic or manic episode or who has ever had a manic or hypomanic episode lasting more than 1 day
Presence of severe and frequently recurrent outbursts and persistent disruption in mood between outbursts
Requires severe impairment in at least one setting and mild to moderate impairment to second settngs
Can receive comorbid diagnosis of ADHD
Children with DMDD may have symptoms that also meet criteria for anxiety disorder and can receive both diagnoses, but children who irritability is manifest in the context of exacerbation of an anxiety disorder diagnosis rather than DMDD
IED and DMDD should not be made in the same child
For children with outbursts and intercurrent persistent irritability, only the diagnosis of DMDD should be made