Dementia in other diseases classified elsewhere (F02) ICD-10-CM
The F02 code range covers dementia in other diseases classified elsewhere with 33 ICD-10-CM diagnosis codes. 24 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- Major neurocognitive disorder in other diseases classified elsewhere
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- the underlying physiological condition, such as:
- Alzheimer's G30
- cerebral lipidosis E75.4
- Creutzfeldt-Jakob disease A81.0
- epilepsy and recurrent seizures G40
- frontotemporal dementia G31.09
- 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 (G31.90)
- 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
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- mild neurocognitive disorder due to known physiological condition with or without behavioral disturbance F06.7
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the F02 Range 33 codes · 24 billable
- F02 Dementia in other diseases classified elsewhereNon-billable
- F02.8 Dementia in other diseases classified elsewhere, unspecified severityNon-billable
- F02.80 Dementia in other diseases classified elsewhere, unspecified severity, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
- F02.81 Dementia in other diseases classified elsewhere, unspecified severity, with behavioral disturbanceNon-billable
- F02.811 Dementia in other diseases classified elsewhere, unspecified severity, with agitation
- F02.818 Dementia in other diseases classified elsewhere, unspecified severity, with other behavioral disturbance
- F02.82 Dementia in other diseases classified elsewhere, unspecified severity, with psychotic disturbance
- F02.83 Dementia in other diseases classified elsewhere, unspecified severity, with mood disturbance
- F02.84 Dementia in other diseases classified elsewhere, unspecified severity, with anxiety
- F02.A Dementia in other diseases classified elsewhere, mildNon-billable
- F02.A0 Dementia in other diseases classified elsewhere, mild, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
- F02.A1 Dementia in other diseases classified elsewhere, mild, with behavioral disturbanceNon-billable
- F02.A11 Dementia in other diseases classified elsewhere, mild, with agitation
- F02.A18 Dementia in other diseases classified elsewhere, mild, with other behavioral disturbance
- F02.A2 Dementia in other diseases classified elsewhere, mild, with psychotic disturbance
- F02.A3 Dementia in other diseases classified elsewhere, mild, with mood disturbance
- F02.A4 Dementia in other diseases classified elsewhere, mild, with anxiety
- F02.B Dementia in other diseases classified elsewhere, moderateNon-billable
- F02.B0 Dementia in other diseases classified elsewhere, moderate, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
- F02.B1 Dementia in other diseases classified elsewhere, moderate, with behavioral disturbanceNon-billable
- F02.B11 Dementia in other diseases classified elsewhere, moderate, with agitation
- F02.B18 Dementia in other diseases classified elsewhere, moderate, with other behavioral disturbance
- F02.B2 Dementia in other diseases classified elsewhere, moderate, with psychotic disturbance
- F02.B3 Dementia in other diseases classified elsewhere, moderate, with mood disturbance
- F02.B4 Dementia in other diseases classified elsewhere, moderate, with anxiety
- F02.C Dementia in other diseases classified elsewhere, severeNon-billable
- F02.C0 Dementia in other diseases classified elsewhere, severe, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety
- F02.C1 Dementia in other diseases classified elsewhere, severe, with behavioral disturbanceNon-billable
- F02.C11 Dementia in other diseases classified elsewhere, severe, with agitation
- F02.C18 Dementia in other diseases classified elsewhere, severe, with other behavioral disturbance
- F02.C2 Dementia in other diseases classified elsewhere, severe, with psychotic disturbance
- F02.C3 Dementia in other diseases classified elsewhere, severe, with mood disturbance
- F02.C4 Dementia in other diseases classified elsewhere, severe, with anxiety
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the F02 range.
Lewy Body Disease
A neurodegenerative disease characterized by dementia, mild parkinsonism, and fluctuations in attention and alertness. The neuropsychiatric manifestations tend to precede the onset of bradykinesia, MUSCLE RIGIDITY, and other extrapyramidal signs. DELUSIONS and visual HALLUCINATIONS are relatively frequent in this condition. Histologic examination reveals LEWY BODIES in the CEREBRAL CORTEX and BRAIN STEM. SENILE PLAQUES and other pathologic features characteristic of ALZHEIMER DISEASE may also be present. (From Neurology 1997;48:376-380; Neurology 1996;47:1113-1124)
About the F02 Code Range
The ICD-10 code section F02 categorizes dementia that arises as a result of other diseases classified elsewhere. These codes are crucial for documenting dementia when it occurs secondary to various underlying conditions, rather than as a primary diagnosis.
The main code F02 and its subcategories, such as F02.80 (dementia without behavioral or psychiatric disturbances) and F02.81–F02.84 (variants with behavioral, psychotic, mood, or anxiety disturbances), cover a broad spectrum of dementia linked to disorders like Parkinson’s disease, Alzheimer's disease, metabolic deficiencies, infectious diseases, and genetic syndromes. For example, “dementia due to Parkinson’s disease” or “Alzheimer disease with psychosis” correspond to specific F02 subcodes. Severity levels are detailed from mild (F02.A), moderate (F02.B), to severe dementia (F02.C), each further divided by the presence or absence of behavioral and psychiatric features. This nuanced classification assists healthcare professionals and coders in accurately coding dementia that is secondary to diverse illnesses for better patient management and reporting.
Questions About This Page
How many billable codes are in the F02 range?
Of the 33 codes in this range, 24 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the F02 range classify?
The range classifies dementia in other diseases classified elsewhere. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
