ICD-10 Diagnosis Code G31.83

Dementia with Lewy bodies

Diagnosis Code G31.83

ICD-10: G31.83
Short Description: Dementia with Lewy bodies
Long Description: Dementia with Lewy bodies
This is the 2018 version of the ICD-10-CM diagnosis code G31.83

Valid for Submission
The code G31.83 is valid for submission for HIPAA-covered transactions.

Code Classification
  • Diseases of the nervous system (G00–G99)
    • Other degenerative diseases of the nervous system (G30-G32)
      • Oth degenerative diseases of nervous system, NEC (G31)

Information for Medical Professionals

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • 331.82 - Dementia w Lewy bodies

  • Dementia associated with Parkinson's Disease
  • Diffuse Lewy body disease
  • Diffuse Lewy body disease with spongiform cortical change
  • Lewy body dementia with behavioral disturbance
  • Parkinson-dementia complex of Guam
  • Senile dementia of the Lewy body type
  • Toxic encephalopathy

Index of Diseases and Injuries
References found for the code G31.83 in the Index of Diseases and Injuries:

Information for Patients

Lewy Body Disease

Also called: Dementia with Lewy bodies

Lewy body disease is one of the most common causes of dementia in the elderly. Dementia is the loss of mental functions severe enough to affect normal activities and relationships. Lewy body disease happens when abnormal structures, called Lewy bodies, build up in areas of the brain. The disease may cause a wide range of symptoms, including

  • Changes in alertness and attention
  • Hallucinations
  • Problems with movement and posture
  • Muscle stiffness
  • Confusion
  • Loss of memory

Lewy body disease can be hard to diagnose, because Parkinson's disease and Alzheimer's disease cause similar symptoms. Scientists think that Lewy body disease might be related to these diseases, or that they sometimes happen together.

Lewy body disease usually begins between the ages of 50 and 85. The disease gets worse over time. There is no cure. Treatment focuses on drugs to help symptoms.

NIH: National Institute of Neurological Disorders and Stroke

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