An 80-year-old patient with ischemic heart disease and history of transient ischemic attacks was admitted with amnesia, cognitive decline, and difficulty communicating. MRI showed old bilateral cerebral artery infarctions. He was diagnosed with vascular dementia due to cerebral atherosclerosis, and he started medications, which improved cognitive function.

Final diagnoses and procedure: (1) Vascular dementia with delirium due to cerebral atherosclerosis, (2) ischemic heart disease, (3) old cerebrovascular accident.

Assign the appropriate 4 codes.