Code first the underlying physiological condition, such as: Alzheimer's disease (G30.-) frontotemporal neurocognitive disorder (G31.09) human immunodeficiency virus [HIV] disease (B20) Huntington's disease (G10) Neurocognitive disorder with Lewy bodies (G31.83) Parkinson's disease (G20.-) systemic lupus erythematosus (M32.-) traumatic brain injury (S06.-) vitamin B deficiency (E53.-) |