Dementia in other diseases classified elsewhere (F02) ICD-10-CM

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
• 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

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.

• dementia in alcohol and psychoactive substance disorders F10 F19
• vascular dementia F01.5 F01.A F01.B F01.C