ICD-10-CM > G00-G99 > G30-G32 > G31 > G31.8 > G31.83 G31.83 Neurocognitive disorder with Lewy bodies Billable/Specific Copy Code Copy Description Applicable To Lewy body dementiaLewy body disease Use Additional code, if applicable, to identify mild neurocognitive disorders due to known physiological condition (F06.7-)