F03 – Unspecified dementia
ICD-10-CM 2027 diagnosis code · Mental disorders due to known physiological conditions
ICD-10-CM code
F03
- Code
F03(claims format:F03)- Description
- Unspecified dementia
- 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 F03
F03 is a header code and cannot be used on claims. Choose the most specific code:
- F03.9 – Unspecified dementia, unspecified severityHeader (more codes below)
- F03.A – Unspecified dementia, mildHeader (more codes below)
- F03.B – Unspecified dementia, moderateHeader (more codes below)
- F03.C – Unspecified dementia, severeHeader (more codes below)
Notes for F03
Applicable to:
- Major neurocognitive disorder NOS
- Presenile dementia NOS
- Presenile psychosis NOS
- Primary degenerative dementia NOS
- Senile dementia NOS
- Senile dementia depressed or paranoid type
- Senile psychosis NOS
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 F03
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Presbyophrenia
- Dementia, senile
- Paranoia, senile
- Dementia, old age
- Old age, dementia
- Depression, senile
- Paranoid, dementia
- Dementia, presenile
- Presenile, dementia
- Melancholia, senile
- State, paranoid, senile
- Paranoid, state, senile
- Insanity, insane, senile
- Reaction, paranoid, senile
- Paranoid, psychosis, senile
- Dementia, in, unknown etiology
- Disorder, major neurocognitive
- Dementia, primary degenerative
- Disorder, neurocognitive, major
- Psychosis, psychotic, presenile
- Psychosis, psychotic, senile NEC
- Dementia, in, multiple, etiologies
- Psychosis, psychotic, presbyophrenic
- Disorder, mental, presenile, psychotic
- Psychosis, psychotic, paranoid, senile
Frequently asked questions
What is ICD-10 code F03?
F03 is the ICD-10-CM code for unspecified dementia, in the block F01-F09 (Mental disorders due to known physiological conditions).
Is F03 a billable code?
No. F03 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.