F02.C
Dementia in other diseases classified elsewhere, severe
F02.C is a non-billable ICD-10-CM code header for dementia in other diseases classified elsewhere, severe. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are 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 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 and 1 more. Its coding notes include a Code first instruction, 1 Excludes1 entry and 3 Excludes2 entries.
Guidelines tip
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
Dementia codes depend on severity documented by the provider. If severity is not documented, the unspecified severity code is assigned. If severity progresses during an inpatient stay, one code is assigned for the highest level.
Code first
If the underlying condition listed here is present and known, sequence it 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)
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (1 note)
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)
Includes
Further defines or gives examples of the content of the category.
- Major neurocognitive disorder in other diseases classified elsewhere
Also from chapter/block level (1 note)
- disorders of psychological development
Notes
Also from chapter/block level (1 note)
- 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.
More specific codes under F02.C 5
- F02.C0Dementia in other diseases classified elsewhere, severe, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxietyBillable
- F02.C1Dementia in other diseases classified elsewhere, severe, with behavioral disturbanceHeader
- F02.C2Dementia in other diseases classified elsewhere, severe, with psychotic disturbanceBillable
- F02.C3Dementia in other diseases classified elsewhere, severe, with mood disturbanceBillable
- F02.C4Dementia in other diseases classified elsewhere, severe, with anxietyBillable