Network
A network is the group of doctors, hospitals, pharmacies, and other providers a plan contracts with. Medicare Advantage plans often use networks, and using in-network providers usually costs less. Original Medicare does not use networks — you can use any provider that accepts Medicare.
This is general education, not personalized advice, and plan details change every year. For all of your options, contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Assistance Program (SHIP) at shiphelp.org.