2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Mental Disorders 290-319 > Other Psychoses 295-299 > Affective Psychoses 296.* > 2006 ICD-9-CM Diagnosis 296.21 Major depressive affective disorder single episode mild degree View the most recent version of ICD-9-CM 296.21 296.21 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 296.* hierarchy