Alzheimer's disease (G30)
ICD-10 code G30 and its subcategories are specifically used to classify Alzheimer's disease, a progressive brain disorder that affects memory and cognitive function. These codes help differentiate types and onset ages, guiding accurate documentation and treatment planning.
The category G30 covers all forms of Alzheimer's disease, with key subdivisions: G30.0 identifies early onset Alzheimer's, also known as primary degenerative dementia of the Alzheimer type with presenile onset, which may include behavioral disturbances or genetic mutations such as in presenilin 1 or 2. G30.1 covers late onset Alzheimer's disease often referred to as senile dementia with features like depression, delirium, or delusions. The G30.8 code is reserved for other atypical forms, such as logopenic or frontal variant non-amnestic Alzheimer disease. Lastly, G30.9 is for unspecified Alzheimer's disease and can include cases with psychosis, behavioral disturbances, or co-occurring delirium. Understanding these distinctions assists in selecting the correct ICD-10 code for Alzheimer's disease subtypes and presentations.
Instructional Notations
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- Alzheimer's dementia senile and presenile forms
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
- code, if applicable, to identify:
- delirium, if applicable F05
- dementia with anxiety F02.84 F02.A4 F02.B4 F02.C4
- dementia with behavioral disturbance F02.81 F02.A1 F02.B1 F02.C1
- dementia with mood disturbance F02.83 F02.A3 F02.B3 F02.C3
- dementia with psychotic disturbance F02.82 F02.A2 F02.B2 F02.C2
- dementia without behavioral disturbance F02.80 F02.A0 F02.B0 F02.C0
- mild neurocognitive disorder due to known physiological condition F06.7
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.
