Not otherwise specified
In medicine, not otherwise specified is a subcategory in systems of disease/disorder classification such as ICD-9, ICD-10, or DSM-IV. It is generally used to note the presence of an illness where the symptoms presented were sufficient to make a general diagnosis, but where a specific diagnosis was not made. The DSM-IV, for example, "applies the term not otherwise specified to a disorder or disturbance that does not meet the criteria for the specific disorders already discussed". The term was introduced because "it is sometimes impossible for the practitioner completing the diagnostic assessment to categorize all the symptoms that a client is experiencing into one diagnostic category". In the context of mental health diagnoses, four situations have been outlined for which such a diagnosis may be considered appropriate:
It is noted, however, that the use of an NOS classification invites scrutiny when billing or seeking reimbursement for practitioners.
Examples
This classification is commonly used in psychiatric diagnoses, such as in:- DD-NOS, depressive disorder
- ED-NOS, eating disorder
- MD-NOS, mood disorder
- PD-NOS, personality disorder
- PDD-NOS, pervasive developmental disorder
- Psychotic disorder not otherwise specified, psychotic disorder
- Dissociative disorder not otherwise specified,dissociative disorder
- PTCL-NOS, peripheral T-cell lymphoma not otherwise specified
- Adenocarcinoma not otherwise specified
- Fall from, out of or through building, not otherwise specified