What Medicare Part B generally covers without cost-sharing
Medicare Part B pays for many preventive services with no cost-sharing
Examples of covered preventive services
Common examples include the annual wellness visit to develop or update a personalized prevention plan, screening mammography for breast cancer, and colorectal cancer screenings such as fecal occult blood testing and colorectal cancer screening tests. Medicare covers cardiovascular risk assessments and certain blood tests for cholesterol, diabetes screening for people at increased risk, osteoporosis screening for eligible women, and abdominal aortic aneurysm screening for men of specific age and smoking history. Vaccinations covered under Part B include the seasonal influenza shot, pneumococcal vaccines, and vaccines recommended by public health authorities for older adults. The U.S. Preventive Services Task Force recommends many of these clinical preventive services, and the Centers for Disease Control and Prevention provides guidance on immunizations.
Relevance, causes, and consequences
Preventive coverage aims to detect disease early, reduce morbidity, and lower downstream costs by catching conditions before they become severe. Public health bodies such as the Centers for Disease Control and Prevention emphasize that routine screening and vaccination reduce transmission and adverse outcomes in older populations. Coverage matters most where uptake is low because of cost barriers; eliminating cost-sharing seeks to increase use of effective services. However, if a clinician orders a test for diagnostic reasons rather than preventive screening, cost-sharing can apply, which may lead to unexpected out-of-pocket expense and affect care-seeking behavior.
Practical considerations and exceptions
no cost-sharing policy applies.