How to Find Medicare Providers: Doctor and Hospital Lookup Tools

Finding a doctor or hospital that accepts Medicare is usually straightforward — over 97% of non-pediatric physicians in the United States participate in Medicare. But "accepts Medicare" and "is in your parent's plan network" are two different things, and confusing the two can result in unexpected bills. The search process also changes depending on whether your parent has Original Medicare or a Medicare Advantage plan.

This guide covers how to find providers under each type of Medicare coverage, which lookup tools actually work, and the verification steps that prevent billing surprises.

Finding providers with Original Medicare

With Original Medicare (Parts A and B), your parent can see any doctor or go to any hospital in the country that accepts Medicare assignment. There's no network to worry about — if the provider participates in Medicare, your parent is covered.

Medicare's provider search tool

Medicare.gov offers a "Find providers" tool at medicare.gov/care-compare. This tool lets you search for:

• Doctors and clinicians — by name, specialty, or location
• Hospitals — including quality ratings and patient experience scores
• Nursing homes and rehab facilities — with quality ratings, inspection results, and staffing data
• Home health agencies
• Dialysis facilities
• Inpatient rehabilitation facilities

For each provider, the tool shows whether they accept Medicare assignment (meaning they agree to charge no more than the Medicare-approved amount), their address, phone number, and in some cases quality metrics.

Understanding Medicare assignment

When a provider "accepts Medicare assignment," they agree to accept the Medicare-approved amount as full payment for a service. Your parent pays the 20% coinsurance on the approved amount, and the provider cannot charge more.

Providers who "participate" in Medicare always accept assignment. Providers who "opt out" of Medicare do not accept Medicare at all — your parent pays the full cost out of pocket.

A third category — "non-participating" providers — accept Medicare patients but don't always accept assignment. They can charge up to 15% above the Medicare-approved amount (called "limiting charges" or "excess charges"). These excess charges are not covered by Original Medicare, though some Medigap plans (Plan G, for example) cover them.

In practice, the vast majority of doctors participate in Medicare and accept assignment. But it's worth confirming, especially for specialists or new providers.

Verifying before an appointment

The online directory is a starting point, but it's not always perfectly current. To verify:

1. Call the provider's office and ask: "Does Dr. [name] accept Medicare? Do they accept Medicare assignment?"
2. For specialists, also ask: "Is a referral required?" (Under Original Medicare, no referral is needed — but the provider's office may have their own scheduling requirements)
3. For hospitals, confirm that the specific department or service your parent needs participates in Medicare

This 2-minute phone call can prevent a billing dispute later.

Finding providers with Medicare Advantage

If your parent has a Medicare Advantage plan, the provider search is different and more restrictive. Advantage plans (especially HMOs) have defined networks, and seeing a provider outside the network can mean paying the full cost.

Using the plan's provider directory

Every Medicare Advantage plan maintains its own provider directory — a list of doctors, specialists, hospitals, and other providers who have contracted with the plan. These directories are available:

• Online at the plan's website
• By phone by calling the plan's member services number
• In print by requesting a hard copy from the plan

When searching the directory:

• Verify the provider is accepting new patients
• Check whether the listing is for the specific plan your parent has (large insurers like UnitedHealthcare or Humana offer multiple Advantage plans with different networks)
• Note whether the provider is "preferred" (lower cost) or "standard" (higher cost) — some PPOs have tiered networks

The directory accuracy problem

Medicare Advantage provider directories are notoriously inaccurate. Studies have consistently found that a significant percentage of listed providers are actually not available — they may have left the network, stopped accepting new patients, or be listed at incorrect addresses.

Always call the provider's office directly to confirm they:

1. Are still in your parent's specific plan
2. Are accepting new patients
3. Are at the address listed

Do this before scheduling an appointment. Showing up to find that the doctor left the network months ago wastes time and can create urgent coverage problems.

Out-of-network care

HMO plans: Generally do not cover out-of-network care except in emergencies. If your parent sees an out-of-network doctor, they pay the entire bill themselves.

PPO plans: Cover out-of-network care but at a higher cost. Your parent will pay higher copays or coinsurance for out-of-network services, and there's often a separate (higher) out-of-pocket maximum for out-of-network care.

Emergency care: All Medicare Advantage plans must cover emergency and urgent care anywhere in the US, regardless of network status.

Finding specific types of providers

Specialists

For Original Medicare, you can search by specialty on Medicare's Care Compare tool. For Advantage plans, use the plan's directory and filter by specialty. In both cases, verify by phone that the specialist accepts your parent's specific coverage.

Hospitals

Medicare's Care Compare tool includes hospital ratings based on:

• Patient experience scores — from patient surveys
• Safety measures — infection rates, surgical complication rates
• Readmission rates — how often patients return within 30 days
• Mortality rates — for specific conditions
• Timely and effective care — how well the hospital follows best practices

These ratings can help you evaluate quality, not just coverage. If your parent has a choice between hospitals (which they do under Original Medicare), the quality ratings are worth reviewing.

Home health agencies

If your parent needs home health care, Medicare's Care Compare rates agencies on quality of care, patient experience, and how often patients needed emergency care or hospitalization while under the agency's care.

Skilled nursing facilities

For post-hospital rehabilitation, the Care Compare tool rates nursing facilities on health inspections, staffing levels, quality measures, and fire safety. Given the wide variation in quality between facilities, these ratings can meaningfully affect your parent's recovery experience.

The Medicare fee schedule

The Medicare Physician Fee Schedule determines how much Medicare pays for each service. If you want to know what a specific procedure or visit costs under Medicare, you can look it up using the CMS Physician Fee Schedule Search tool at cms.gov.

This is useful for:

• Estimating out-of-pocket costs — knowing the Medicare-approved amount lets you calculate the 20% coinsurance your parent would owe
• Verifying bills — if a provider bills more than the Medicare-approved amount for an assignment-accepting provider, something is wrong
• Comparing costs — some procedures have significantly different costs depending on whether they're performed in a hospital outpatient department vs. a doctor's office

The fee schedule is technical and primarily useful for specific cost questions rather than general provider searches.

When your parent's doctor doesn't accept their plan

If your parent's preferred doctor is not in their Medicare Advantage network, the options are:

1. Switch plans during an enrollment period to one that includes their doctor
2. Request an exception from the plan for out-of-network coverage (sometimes granted for continuity of care, especially for ongoing treatment)
3. See the doctor out of network (PPO only) and pay the higher cost-sharing
4. Switch to Original Medicare where any Medicare-participating doctor is covered

If the doctor issue is discovered shortly after enrollment, the Medicare Advantage Open Enrollment Period (January 1 - March 31) allows one plan change.

Getting help with provider searches

Your parent's State Health Insurance Assistance Program (SHIP) can help verify whether providers accept Medicare and assist with network verification for Advantage plans. SHIP counselors know the local healthcare landscape and can often identify providers that online directories miss.

For a systematic approach to finding and verifying providers, our Medicare Enrollment Guide includes a provider verification checklist, a network adequacy assessment tool, and a step-by-step process for confirming coverage before every appointment — so your parent never gets an unexpected out-of-network bill.