F02Dementia in other diseases classified elsewhere

F02 is the ICD-10-CM diagnosis code for dementia in other diseases classified elsewhere. It belongs to block F01-F09 (mental disorders due to known physiological conditions) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: F02.8 (unspecified severity), F02.A (mild), F02.B (moderate) and F02.C (severe).

Don't report F02 together with the conditions in its Excludes1 note: mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-).

The conditions in its Excludes2 note aren't part of F02, but may be coded alongside it if the patient has both: dementia in alcohol and psychoactive substance disorders (F10-F19, with .17, .27, .97) and vascular dementia (F01.5-, F01.A-, F01.B-, F01.C-).

Code first the underlying physiological condition, such as: Alzheimer's (G30.-), cerebral lipidosis (E75.4), Creutzfeldt-Jakob disease (A81.0-), epilepsy and recurrent seizures (G40.-) and 20 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.