Slowly progressive cognitive difficulties (particularly with recent memories) in patients over age 65 is usually Alzheimer's disease. If history and cognitive exam (MMSE, Moca, etc) are typical then neuropsychology referral is not necessary and should be reserved for more borderline cases. Otherwise usual work up is warranted (MRI, labs like B12, TSH) although rarely contribute to management. If patients and family are interested in amyloid lowering therapy then biomarker testing with either CSF or amyloid PET is needed. I agree that blood based biomarkers (p-tau 217) may soon replace CSF and PET but as of yet are not covered by insurance and are not adequate to get amyloid lowering therapy approved. Work up is generally straight forward in most patients. Nuance is required for atypical presentations such as younger onset, more rapid progression, non-amnestic presentation or confounding factors such as significant vascular changes, parkinsonism or the very old (over age 85) where LATE may be a contributing factor.