Original Medicare does not require you to choose a primary care doctor. Some Medicare Advantage plans do, and they may require that doctor to refer you to specialists.

Even when a primary care doctor is optional, having one can make care easier to coordinate.

Primary Care With Original Medicare

Original Medicare does not require you to formally choose a primary care doctor. You can visit any doctor or other clinician who accepts Medicare, and in most cases you do not need a referral to see a specialist.

Before making an appointment, verify that the clinician:

  • Is enrolled in Medicare
  • Is accepting new Medicare patients
  • Accepts assignment, if you want the lowest predictable cost
  • Accepts Medicare for visits at the office you plan to use

A provider who accepts assignment agrees to accept the Medicare-approved amount as full payment for covered services, leaving you responsible for applicable deductibles and coinsurance.

Primary Care With Medicare Advantage

Rules vary by plan type.

HMO plans usually require you to select an in-network primary care doctor. That doctor may coordinate care and provide referrals to specialists.

PPO plans generally do not require you to choose a primary care doctor or get a referral, but using in-network providers usually costs less.

Special Needs Plans may require a primary care doctor and often use care coordination for members with particular conditions or eligibility needs.

Other plan types have different rules. Read the Evidence of Coverage, the document explaining your plan’s benefits and rules, and check its provider directory. Confirm the details with the plan.

Medicare's comparison of Medicare Advantage plan types shows which types commonly require a primary doctor.

Why Have a Primary Care Doctor Anyway?

A regular primary care clinician can help:

  • Track preventive screenings and vaccines
  • Review medications from multiple prescribers
  • Manage chronic conditions
  • Evaluate new symptoms
  • Coordinate specialists and follow-up care
  • Keep specialist reports and your medication list together

Medicare covers a “Welcome to Medicare” preventive visit during your first 12 months with Part B. You must have Part B for more than 12 months before your first yearly “Wellness” visit. That visit also cannot be within 12 months of a Welcome visit. See the visit timing and cost rules. These visits are not the same as a routine head-to-toe physical, but they can support prevention planning.

How to Choose a Medicare Primary Care Doctor

Start with coverage, then consider fit.

Ask the office and your plan:

  • Are you accepting new patients with my exact coverage?
  • Do you accept Medicare assignment?
  • Are you in my Medicare Advantage plan's network at this location?
  • Which hospitals and specialists do you work with?
  • Do you offer telehealth or same-day appointments?
  • How do you handle urgent questions after hours?

Provider directories can be out of date. Verify network status directly with the plan and confirm with the doctor's office before receiving care.

Can You Change Primary Care Doctors?

With Original Medicare, you can generally begin seeing another participating doctor whenever you choose. With Medicare Advantage, follow the plan's procedure for changing your designated primary care doctor. The change may not be immediate, so ask when you can start seeing the new doctor.

You may also be able to choose a nurse practitioner or another eligible primary care clinician. If your plan requires a primary care doctor, ask which clinicians qualify.

Medicare policy sources last checked: October 8, 2026.