G31.83: Neurocognitive disorder with Lewy bodies
G31.83 is the billable ICD-10-CM diagnosis code for Neurocognitive disorder with Lewy bodies. It is a fully specified code, so it can be reported on a claim (subject to clinical documentation and your payer's rules).
Frequently asked questions
What is ICD-10-CM code G31.83?
G31.83 is the ICD-10-CM diagnosis code for Neurocognitive disorder with Lewy bodies. It belongs to category G31 (Other degenerative diseases of nervous system, not elsewhere classified).
Is G31.83 a billable code?
Yes. G31.83 is a billable, fully specified ICD-10-CM code, so it can be used on a claim (subject to documentation and payer rules).
What category does G31.83 belong to?
G31.83 is part of ICD-10-CM category G31 — Other degenerative diseases of nervous system, not elsewhere classified, which has 28 billable codes.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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