Which of the following is an example of why a service might not be covered under Medicare?

Services deemed cosmetic are not covered under Medicare because Medicare prioritizes coverage for medically necessary treatments that improve health outcomes and address specific medical conditions. Cosmetic procedures, which are typically aimed at enhancing appearance rather than addressing a medical need, do not meet these criteria and are therefore excluded from coverage. This distinction is crucial, as it reflects Medicare’s focus on funding treatments that serve a clear medical purpose rather than aesthetic enhancements.

Emergency surgeries, medically necessary procedures, and preventive screenings are generally covered because they address critical health needs or promote overall wellness, aligning with Medicare's objectives of ensuring access to necessary care for enrollees.