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 2018 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

ICD-9 Code ICD-9 Description
331.11 Pick's disease
331.19 Other frontotemporal dementia
331.2 Senile degeneration of brain
331.3 Communicating hydrocephalus
331.4 Obstructive hydrocephalus
331.5 Idiopathic normal pressure hydrocephalus (INPH)
331.6 Corticobasal degeneration
331.7 Cerebral degeneration in diseases classified elsewhere
331.81 Reye's syndrome
331.82 Dementia with lewy bodies
331.83 Mild cognitive impairment, so stated
331.89 Other cerebral degeneration
331.9 Cerebral degeneration, unspecified

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