Final answer:
Medicare does not cover long-term nursing home care. It does cover hospital care, physician visits, and home health care under specific conditions. Part B of Medicare covers outpatient medical services.
Step-by-step explanation:
The health care cost that Medicare does not cover among the options provided is A) long-term nursing home care. Medicare typically covers hospital care, physician visits, and home health care under specific conditions. However, long-term nursing home or custodial care is not generally covered.
The Part A of Medicare covers hospital stays and other inpatient services, while Part B, which is optional, covers outpatient medical services, including physician services, medical tests, and outpatient visits.