Networks & Providers
Network
Quick answer
A network is the group of doctors, hospitals, and other providers that have contracted with a Medicare Advantage or Part D plan to deliver care and drugs at agreed rates.
Plain-English definition
Networks vary by plan and county. HMOs typically require in-network care; PPOs allow out-of-network care at higher cost.
Why it matters
Confirm your doctors are in-network before choosing a plan.
A simple example
You check the provider directory to confirm your cardiologist is in the plan's network.
Common mistakes & misconceptions
Related terms
In-Network
An in-network provider has a contract with your plan to deliver care at negotiated rates. You pay the plan's lowest cost-sharing when you stay in-network.
Out-of-Network
An out-of-network provider does not have a contract with your plan. On HMOs, out-of-network care is usually only covered in emergencies. On PPOs, it's covered at a higher cost.
Provider Directory
A provider directory is the plan's searchable list of in-network doctors, hospitals, and other providers. Use it to confirm your care team is covered.
HMO
A Medicare Advantage HMO is a plan that uses a specific network of doctors and hospitals. You choose a primary care provider (PCP) and usually need a referral to see specialists.
PPO
A Medicare Advantage PPO lets you see providers in or out of the network, usually without a referral. Out-of-network care costs more and has its own MOOP.
Frequently asked questions
Do networks change?+
Yes — providers can join or leave during the year.
Sources & references
📚 Where this information comes from
- Medicare.gov — official U.S. government site for people with Medicare ↗Primary source for benefits, enrollment periods, and plan comparison.
- CMS.gov — Centers for Medicare & Medicaid Services ↗Federal rulemaking, program updates, and official guidance.
- Social Security Administration — Medicare enrollment & premiums ↗Enrollment, premium withholding, and IRMAA determinations.
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Medicare Caddies is an independent insurance agency. We are not affiliated with, endorsed by, or connected to the U.S. government, the federal Medicare program, or the Centers for Medicare & Medicaid Services (CMS). We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.