G31.83: Neurocognitive disorder with Lewy bodies
G31.83 is a billable, specific ICD-10-CM code for neurocognitive disorder with lewy bodies. It is valid for submission on a claim.
Check G31.83 with the rest of the claim: free scrubberUse additional code
Add a secondary code to capture the detail described below.
- code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Lewy body dementia
- Lewy body disease
Other codes that can never be billed with G31.83
Their own Excludes1 notes name this code, so the conflict is not listed above.
- G21Secondary parkinsonism
Risk adjustment
G31.83 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 127 Dementia, Mild or Unspecified0.341 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
G31.83 is named in 12 Medicare coverage policies: 10 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which one applies depends on your Medicare contractor.
- A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
- A56562Billing and Coding: Health and Behavior Assessment/Interventionnot covered
- A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
- A56756Billing and Coding: Home Health - Psychiatric Care
Alphabetic index entries that lead here
- Lewy body(ies) (disease)
- Dementia›Lewy body
- Disease, diseased›Lewy body(dementia)
- Dementia›Lewy body›with behavioral disturbance
- Dementia›with›Lewy bodies
- Disease, diseased›Lewy body›with behavioral disturbance
- Disorder›neurocognitive›with Lewy bodies
- Dementia›with›Lewy bodies›with behavioral disturbance
Code history
Unchanged in every release from FY2024 to FY2027.