Dental care and dentures (with only a few exceptions)
Diabetic supplies (some, like syringes or insulin, unless the insulin is used with an insulin pump or unless you get Medicare coverage for prescription drugs [Part D])
Eye care (routine exam), eye refractions and most eyeglasses
Foot care (routine) such as cutting of corns or calluses (with only a few exceptions)
Hearing aids and hearing exams for the purpose of fitting a hearing aid
Hearing tests that haven't been ordered by your doctor
Long-term Care, such as custodial care in a nursing home
Orthopedic shoes (with only a few exceptions)
Physical exams (routine or yearly) (Medicare will cover a one-time physical exam within the first six months you have Part B.)
Prescription drugs--most prescription drugs aren't covered by Medicare Part A or Part B. See Section What is Medicare Prescription Drug Coverage
for information about adding Medicare coverage for prescription drugs (Part D).
Travel (Health care you get while traveling outside of the United States, except as listed under Part B Helps Cover ....)
(Primary Source: Centers for Medicare and Medicaid Services - Medicare and You Handbook. This content may have been enhanced by Q1Group LLC to include further examples, explanations, and links.)
Medicare Supplements fill the gaps in your Original Medicare