F02 – Dementia in other diseases classified elsewhere

ICD-10-CM 2027 diagnosis code · Mental disorders due to known physiological conditions

Non-billable header

ICD-10-CM code F02

Code: F02 (claims format: F02)
Description: Dementia in other diseases classified elsewhere
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: F01-F09 Mental disorders due to known physiological conditions

Billable codes under F02

F02 is a header code and cannot be used on claims. Choose the most specific code:

F02.8 – Dementia in other diseases classified elsewhere, unspecified severityHeader (more codes below)
F02.A – Dementia in other diseases classified elsewhere, mildHeader (more codes below)
F02.B – Dementia in other diseases classified elsewhere, moderateHeader (more codes below)
F02.C – Dementia in other diseases classified elsewhere, severeHeader (more codes below)

Notes for F02

Includes:

Major neurocognitive disorder in other diseases classified elsewhere

Excludes1 (not coded here):

mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)

Excludes2 (not included here):

dementia in alcohol and psychoactive substance disorders (F10-F19, with .17, .27, .97)
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.-)
hepatolenticular degeneration (E83.01)
human immunodeficiency virus [HIV] disease (B20)
Huntington's disease (G10)
hypercalcemia (E83.52)
hypothyroidism, acquired (E00-E03.-)
intoxications (T36-T65)
Jakob-Creutzfeldt disease (A81.0-)
multiple sclerosis (G35-)
neurocognitive disorder with Lewy bodies (G31.83)
neurosyphilis (A52.17)
niacin deficiency [pellagra] (E52)
other frontotemporal neurocognitive disorder (G31.09)
Parkinson's disease (G20.-)
Pick's disease (G31.01)
polyarteritis nodosa (M30.0)
prion disease (A81.9)
systemic lupus erythematosus (M32.-)
traumatic brain injury (S06.-)
trypanosomiasis (B56.-, B57.-)
vitamin B deficiency (E53.8)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block F01-F09

Notes:

This block comprises a range of mental disorders grouped together on the basis of their having in common a demonstrable etiology in cerebral disease, brain injury, or other insult leading to cerebral dysfunction. The dysfunction may be primary, as in diseases, injuries, and insults that affect the brain directly and selectively; or secondary, as in systemic diseases and disorders that attack the brain only as one of the multiple organs or systems of the body that are involved.

Index terms for F02

Entries in the ICD-10-CM alphabetic index that lead to this code:

Frequently asked questions

What is ICD-10 code F02?

F02 is the ICD-10-CM code for dementia in other diseases classified elsewhere, in the block F01-F09 (Mental disorders due to known physiological conditions).

Is F02 a billable code?

No. F02 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.