Original Medicare vs. Medicare Advantage Plan Coverage Original Medicare: Medically necessary services and supplies in hospitals and doctors offices and other health care facilities are covered, while some routine services such as physical exams, eye exams and most dental care are not covered Prior authorization is not required in most cases for Original Medicare to cover services or supplies You can join a separate Part D plan to get Medicare drug coverage Medicare Advantage (Part C) Each plan must cover all medically necessary services that arecovered by Original Medicare. Pans may use different coveragecriteria to deem medical necessity for some services Prior authorization from your plan is necessary in many cases before itwill cover services or supplies Part D, Medicare drug coverage, is included with most plans Foreign Travel Original Medicare: You may be able to buy a Medicare Supplement Insuranceor Medigap policy that covers medical care outside the US. Original Medicare typically does not cover medical care outside of the US Medicare Advantage (Part C): Most plans do not cover medical care outside the US. Some plans may offer an extra benefit that will cover emergency services while traveling outside of the US