331.0 ALZHEIMER'S DISEASE

Code Information

Diagnosis Code: 331.0

Short Description: Alzheimer's disease

Long Description: Alzheimer's disease

Code Classification:

  • Diseases of the nervous system (320–359)
    • Hereditary and degenerative diseases of the central nervous system (330-337)
      • 331 Other cerebral degenerations
        • 331.0 Alzheimer's disease

Code Version: 2015 ICD-9-CM

References to Index of Diseases and Injuries

The code 331.0 has the following ICD-9-CM references to the Index of Diseases and Injuries
  • Alzheimer's
    • dementia (senile)
      • with behavioral disturbance� 331.0 [294.11]
      • without behavioral disturbance 331.0 [294.10]
    • disease or sclerosis 331.0
      • with dementia - see Alzheimer's, dementia
  • Atrophy, atrophic
    • brain (cortex) (progressive) 331.9
      • Alzheimer's 331.0
        • with dementia - see Alzheimer's, dementia
    • sclerosis, lobar (of brain) 331.0
      • with dementia
        • with behavioral disturbance 331.0 [294.11]
        • without behavioral disturbance 331.0 [294.10]
  • Dementia 294.20
    • due to or associated with condition(s) classified elsewhere
      • Alzheimer's
        • with behavioral disturbance 331.0 [294.11]
        • without behavioral disturbance 331.0 [294.10]
  • Disease, diseased - see also Syndrome
    • brain 348.9
      • Alzheimer's 331.0
        • with dementia - see Alzheimer's, dementia
  • Sclerosis, sclerotic
    • Alzheimer's 331.0
      • with dementia - see Alzheimer's, dementia
    • brain (general) (lobular) 348.89
      • atrophic lobar 331.0
        • with dementia
          • with behavioral disturbance 331.0 [294.11]
          • without behavioral disturbance 331.0 [294.10]
    • lobar, atrophic (of brain) 331.0
      • with dementia
        • with behavioral disturbance 331.0 [294.11]
        • without behavioral disturbance 331.0 [294.10]
  • Syndrome - see also Disease
    • Alzheimer's 331.0
      • with dementia - see Alzheimer's, dementia

Crosswalk Information

The code 331.0 converts into the following ICD-10 code(s):
ICD-9 Code ICD-10 Code ICD-10 Description
331.0 Right Arrow G30.9 Alzheimer's disease, unspecified
This ICD-9 to ICD-10 data is based on the 2015 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

No. ICD-9 Code ICD-9 Description
1 331.11 Pick's disease
2 331.19 Other frontotemporal dementia
3 331.2 Senile degeneration of brain
4 331.3 Communicating hydrocephalus
5 331.4 Obstructive hydrocephalus
6 331.5 Idiopathic normal pressure hydrocephalus (INPH)
7 331.6 Corticobasal degeneration
8 331.7 Cerebral degeneration in diseases classified elsewhere
9 331.81 Reye's syndrome
10 331.82 Dementia with lewy bodies
11 331.83 Mild cognitive impairment, so stated
12 331.89 Other cerebral degeneration
13 331.9 Cerebral degeneration, unspecified

This page was last updated on: 10/1/2014