F02
Dementia in other diseases classified elsewhere
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 4 never code together
F02code
Excludes1
F01-F99chapter
Excludes2
- symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)R00-R99
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 29
F02code
Includes
- Major neurocognitive disorder in other diseases classified elsewhere
Code first
- the underlying physiological condition, such as:
- Alzheimer's (G30.-)G30.-G30.-G30.-
- cerebral lipidosis (E75.4)E75.4E75.4E75.4
- Creutzfeldt-Jakob disease (A81.0-)A81.0-A81.0-A81.0-
- epilepsy and recurrent seizures (G40.-)G40.-G40.-G40.-
- frontotemporal dementia (G31.09)G31.09G31.09G31.09
- hepatolenticular degeneration (E83.01)E83.01E83.01E83.01
- human immunodeficiency virus [HIV] disease (B20)B20B20B20
- Huntington's disease (G10)G10G10G10
- hypercalcemia (E83.52)E83.52E83.52E83.52
- hypothyroidism, acquired (E00-E03.-)E00-E03E00-E03E00-E03
- intoxications (T36-T65)T36-T65T36-T65T36-T65
- Jakob-Creutzfeldt disease (A81.0-)A81.0-A81.0-A81.0-
- multiple sclerosis (G35-)G35-G35-G35-
- neurocognitive disorder with Lewy bodies (G31.83)G31.83G31.83G31.83
- neurosyphilis (A52.17)A52.17A52.17A52.17
- niacin deficiency [pellagra] (E52)E52E52E52
- other frontotemporal neurocognitive disorder (G31.90)G31.90G31.90G31.90
- Parkinson's disease (G20.-)G20.-G20.-G20.-
- Pick's disease (G31.01)G31.01G31.01G31.01
- polyarteritis nodosa (M30.0)M30.0M30.0M30.0
- prion disease (A81.9)A81.9A81.9A81.9
- systemic lupus erythematosus (M32.-)M32.-M32.-M32.-
- traumatic brain injury (S06.-)S06.-S06.-S06.-
- trypanosomiasis (B56.-, B57.-)B56.-B56.-B56.-B57.-B57.-B57.-
- vitamin B deficiency (E53.8)E53.8E53.8E53.8
F01-F09block
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.
F01-F99chapter
Includes
- disorders of psychological development
Index entries leading here filed at null
No alphabetic index entry points at this code.
Subordinate codes 4
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.