All ICD10 Codes
F02Not billable, use a more specific code below

Dementia in other diseases classified elsewhere

In Mental disorders due to known physiological conditions (F01-F09), chapter 5: Mental, Behavioral and Neurodevelopmental Disorders

24 billable codes under F02: 20 are a CC; all map to HCC 127 (Dementia, Mild or Unspecified), HCC 125 (Dementia, Severe), HCC 126 (Dementia, Moderate).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Includes: conditions that are coded here

  • Major neurocognitive disorder in other diseases classified elsewhere

Excludes1: not coded here, use a different code

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

Excludes2: not included here, code separately if applicable

  • 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: code the underlying condition first, then this code

  • 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)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

  • Section I.C.5.d Dementia (page 45), covers F02

    Code dementia (F01, F02, F03) by cause and by severity as the provider documents it; use unspecified severity when it is not stated. If it worsens during an inpatient stay, assign one code for the highest severity reached.

Other Chapter 5 topics:

Read Section I.C.5 (page 43)

All codes under F02

F02 can't be used on a claim. Pick a billable code below; grey headings group them.

F02 MS-DRG

As the principal diagnosis, all 24 billable codes under F02 group to MS-DRG 884 (v44.0).

Other codes that refer to F02

Notes on these codes point to F02.

  • F06 Excludes2: dementia as classified in F01-F02
  • F06.7 Excludes1: dementia (F01.-, F02.-, F03.-)
  • G31.84 Excludes1: dementia (F01.-, F02.-, F03.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Dementia

Dementia is a loss of mental functions that is severe enough to affect your daily life and activities. These functions include: It is normal to become a bit more forgetful as you age. But dementia is not a normal part of aging. It is a serious disorder that interferes with your daily life.

Read more about dementia on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.