For Depression NOS (Not Otherwise Specified), Depressive State NOS, or Depressive Disorder NOS, the ICD 9 Code used is under the "Neurotic Disorders, Personality Disorders, and Other Nonpsychotic Mental Disorders (Code 300 - 316)" Category, specifically ICD 9 Code 311. Depression ICD 9 to ICD 10 Codes Conversion
The ICD-10-CM code F32.1 might also be used to specify conditions or terms like moderate depression, moderate major depression, moderate major depression, single episode or moderate major depressive disorder co-occurrent with anxiety single episode.
There are two main diagnostic tools for depression: the ICD 10 for depression and the DSM-5 definition of depression. In North America the DSM-5 is more widely used whereas internationally, the ICD 10 for depression is more common. (More on those below.) Although the ICD-10 depression symptoms are similar to the DSM-5 depression symptoms, there are important differences, which are discussed below.
F32.9 is a billable ICD code used to specify a diagnosis of major depressive disorder, single episode, unspecified. A 'billable code' is detailed enough to be used to specify a medical diagnosis. The ICD code F32 is used to code Major depressive disorder
Code F32. 9 is the diagnosis code used for Major Depressive Disorder, Single Episode, Unspecified.
According to the DSM-IV, DD-NOS encompasses "any depressive disorder that does not meet the criteria for a specific disorder." In the DSM-5, it is called unspecified depressive disorder. Examples of disorders in this category include those sometimes described as minor depressive disorder and recurrent brief depression.
The unspecified mood disorder applies to presentations in which symptoms predominate that are characteristic of a depressive disorder and cause clinically significant distress or impairment in social, occupational, or other important areas of functioning.
PDD-NOS stands for Pervasive Developmental Disorder-Not Otherwise Specified. PDD-NOS was one of several previously separate subtypes of autism that were folded into the single diagnosis of autism spectrum disorder (ASD) with the publication of the DSM-5 diagnostic manual in 2013.
Not Otherwise Specified, Other Specified Disorder or Unspecified Disorder | Mental Health America.