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ICD-10-CM 2027 diagnosis code

F02.C1Dementia in other diseases classified elsewhere, severe, with behavioral disturbance

Not billable — use a more specific code

F02.C1 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.Short description: Dem in other dis classd elswhr, severe, with beh disturb

Code last changed in FY2023 (effective October 1, 2022). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F02.C1

F02.C1 is the ICD-10-CM diagnosis code for dementia in other diseases classified elsewhere, severe, with behavioral disturbance. It belongs to category F02 (dementia in other diseases classified elsewhere), 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 2 subcodes must be used instead.

Within F02.C (dementia in other diseases classified elsewhere, severe), F02.C1 is specifically for dementia in other diseases classified elsewhere, severe, with behavioral disturbance. Related codes cover without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety (F02.C0), with psychotic disturbance (F02.C2), with mood disturbance (F02.C3) and with anxiety (F02.C4).

To report this condition, pick the subcode that matches the documentation: F02.C11 (agitation) and F02.C18 (disturbance).

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 was added in FY2023, effective October 1, 2022.

Specific codes under F02.C1

Notes that apply from higher levels

Instructions written at a parent level also apply to F02.C1.

› From F02 Dementia in other diseases classified elsewhere
Includes
  • Major neurocognitive disorder in other diseases classified elsewhere
Excludes1
  • mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance (F06.7-)
Excludes2
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)

Broader instructions also apply from F01-F09 Mental disorders due to known physiological conditions and Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Codes whose notes reference F02.C1

  • A81Use additional code
  • G10Use additional code
  • G20Use additional code
  • G30Use additional code
  • G31Use additional code

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2023 (effective 10/1/2022): Added
  • No changes since FY2023.

Common questions about F02.C1

Is F02.C1 billable?

No. F02.C1 is a header code. Report one of its more specific subcodes instead.