F02.A18 – Dementia in other diseases classified elsewhere, mild, with other behavioral disturbance

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

Billable code

ICD-10-CM code F02.A18
Code
F02.A18 (claims format: F02A18)
Description
Dementia in other diseases classified elsewhere, mild, with other behavioral disturbance
Short description
Dem in other dis classd elswhr, mild, with other beh distrb
Billable
Yes – valid for HIPAA-covered transactions
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
Parent codes
F02 › F02.A › F02.A1

Notes for F02.A18

Applicable to:
  • Dementia in other diseases classified elsewhere, mild, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
  • Major neurocognitive disorder in other diseases classified elsewhere, mild, with behavioral disturbances such as sleep disturbance, social disinhibition, or sexual disinhibition
Use additional code:
  • code, if applicable, to identify wandering in dementia in conditions classified elsewhere (Z91.83)

Notes inherited from parent codes

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

F02 – Dementia in other diseases classified elsewhere

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)

F02.A – Dementia in other diseases classified elsewhere, mild

Excludes1 (not coded here):
  • mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)

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.A18

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

Related codes in F02.A1

Frequently asked questions

What is ICD-10 code F02.A18?

F02.A18 is the ICD-10-CM code for dementia in other diseases classified elsewhere, mild, with other behavioral disturbance, in the block F01-F09 (Mental disorders due to known physiological conditions).

Is F02.A18 a billable code?

Yes. F02.A18 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does F02.A18 belong to?

It belongs to category F02 – Dementia in other diseases classified elsewhere.

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.