ICD-9 Diagnosis Code 331.0

Alzheimer's disease

Diagnosis Code 331.0

ICD-9: 331.0
Short Description: Alzheimer's disease
Long Description: Alzheimer's disease
This is the 2014 version of the ICD-9-CM diagnosis code 331.0

Code Classification
  • Diseases of the nervous system (320–359)
    • Hereditary and degenerative diseases of the central nervous system (330-337)
      • 331 Other cerebral degenerations

Information for Medical Professionals

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Index of Diseases and Injuries
References found for the code 331.0 in the Index of Diseases and Injuries:


Information for Patients


Alzheimer's Disease

Also called: AD

Alzheimer's disease (AD) is the most common form of dementia among older people. Dementia is a brain disorder that seriously affects a person's ability to carry out daily activities.

AD begins slowly. It first involves the parts of the brain that control thought, memory and language. People with AD may have trouble remembering things that happened recently or names of people they know. A related problem, mild cognitive impairment (MCI), causes more memory problems than normal for people of the same age. Many, but not all, people with MCI will develop AD.

In AD, over time, symptoms get worse. People may not recognize family members. They may have trouble speaking, reading or writing. They may forget how to brush their teeth or comb their hair. Later on, they may become anxious or aggressive, or wander away from home. Eventually, they need total care. This can cause great stress for family members who must care for them.

AD usually begins after age 60. The risk goes up as you get older. Your risk is also higher if a family member has had the disease.

No treatment can stop the disease. However, some drugs may help keep symptoms from getting worse for a limited time.

NIH: National Institute on Aging

  • Alzheimer disease
  • Bathing - NIH (National Institute on Aging)
  • Changes in Communication Skills - NIH (National Institute on Aging)
  • Changes in Intimacy and Sexuality - NIH (National Institute on Aging)
  • Coping with Agitation and Aggression - NIH (National Institute on Aging)
  • Daily Activities - NIH (National Institute on Aging)
  • End-of-Life Care - NIH (National Institute on Aging)
  • Exercise and Physical Activity - NIH (National Institute on Aging)
  • Grooming and Dressing - NIH (National Institute on Aging)
  • Hallucinations, Delusions, and Paranoia - NIH (National Institute on Aging)
  • Healthy Eating - NIH (National Institute on Aging)
  • Helping Family and Friends Understand Alzheimer's Disease - NIH (National Institute on Aging)
  • Helping Kids Understand Alzheimer's Disease - NIH (National Institute on Aging)
  • Incontinence - NIH (National Institute on Aging)
  • Managing Medicines - NIH (National Institute on Aging)
  • Managing Personality and Behavior Changes - NIH (National Institute on Aging)
  • Mental status testing
  • Rummaging and Hiding Things - NIH (National Institute on Aging)


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