ANNA is a telephony-based cognitive assessment tool designed to aid nurses in caring for patients who require close monitoring for the development of confusion or neurological impairment. Of particular concern is the treatment of Immune Effector Cell-Associated Neurotoxicity Syndrome (ICANS), a condition which occurs quite frequently as an adverse outcome of Chimeric Antigen Receptor-T (CAR-T) cancer immunotherapy. ANNA employs both traditional verbal tests for cognitive impairment and novel linguistic methods which identify abnormalities in the patient's speech during ordinary conversation. To collect ordinary speech it uses a lightweight instance of the Facebook's Large Language Model BlenderBot to engage the patient in a partially unscripted conversation. ANNA is designed with easy employment by healthcare providers in mind, being sufficiently lightweight to run on consumer-grade hardware and needing access only to a patient's phone number to interact with them.