Can I keep my OHSU doctor with Medicare in 2027?

Last checked: November 13, 2026. I read OHSU's insurance pages that day, along with Medicare's 2027 hospital data for the Portland area and the insurance companies' public provider directories. OHSU says its list can change without notice. OHSU and your plan are the ones to trust over any summary, including this one.

“Can I keep my OHSU doctor?” comes up in a lot of my reviews this fall, on both sides of the river. People drive from Vancouver, Camas and Battle Ground to Marquam Hill for cancer care, eye care, transplant and neurology. The answer for 2027 turns on five things: the insurance company, the exact plan, the OHSU location, the individual doctor, and the plan's rules for referrals and approvals.

What OHSU says for 2027

OHSU's billing and insurance page lists the insurance companies it works with. It names companies, not plans, and it warns that some plans limit what they'll cover at OHSU and that the list may change without notice. Three notes on it matter for Medicare:

• Regence: “excludes Medicare Advantage plans after 12/31/26.” OHSU's Regence page adds that Hillsboro Medical Center leaves Regence's Medicare Advantage HMO and PPO plans too. Regence employer and other commercial plans keep OHSU under a new agreement reached August 27, 2026. That deal is the headline many people saw, and it doesn't cover Medicare Advantage.
• Aetna: “excludes Medicare Advantage plans after 12/31/26.”
• Providence Health Plan: “Closes 12/31/26.” That is the insurance company winding down, not the hospitals. What Providence Health Plan members need to do.

The same page says OHSU accepts Original Medicare and all Medicare Supplement plans. Care under Regence and Aetna Medicare Advantage stays in network through December 31, 2026.

2027 Medicare Advantage and OHSU, company by company

This combines OHSU's own list with Multnomah County's chart of 2027 hospital networks, which the county built from Medicare.gov data for Multnomah and Clackamas County plans and last updated October 29, 2026. Where the two disagree, I say so. Clark County plans are in the next section.

“OHSU Hospital” in that chart means the hospital. It doesn't tell you whether a particular OHSU doctor, clinic or service is in the plan. That is the next check.

If you live in Clark County

Clark County plans are Washington plans, so the Portland-area chart doesn't cover most of them. So I took 40 doctors registered at OHSU's Marquam Hill and South Waterfront campuses, five each in eye care, internal medicine, family medicine, cancer, neurology, heart, orthopedics and urology, and looked them up in the public directories the insurance companies publish for Medicare:

• Humana: its 2027 directory lists 22 of the 40 doctors. 19 of those 22 are in the network of every Humana HMO and dual plan sold in Clark County, and 21 are in its PPOs. The other 18 weren't in Humana's directory at all, which usually means missing data rather than out of network.
• UnitedHealthcare: it hadn't loaded 2027 networks into its public directory when I checked. In its 2026 directory, 22 of the 26 doctors it lists are in network for its four Clark County AARP HMO-POS plans. That's last year's network, so ask UnitedHealthcare about 2027.
• Devoted: its 2027 directory lists 4 of the 40, none of them at an OHSU address. They show up at other systems' offices, such as PeaceHealth in Vancouver. At OHSU Hospital's address it lists nothing, and at Casey Eye, the South Waterfront building and the Physicians Pavilion it lists only OHSU's pharmacies, not clinics or doctors.
• Regence: its Clark County plans are the Regence Medicare Advantage PPOs that OHSU says are out from January 1.
• Wellcare and Kaiser sell Clark County plans with the same plan numbers as the Portland-area ones in the county chart: Wellcare's two PPOs show OHSU Hospital there, and Kaiser's plans don't.

A sample is a sample. Your doctor may be listed differently, and directories have errors, so look up your own doctors by name and call the plan.

HMO or PPO: how out-of-network care works

Medicare's booklet Understanding Medicare Advantage Plans (April 2026) puts it this way:

• HMO. You generally must use the plan's network, except for emergency care, urgent care when you're away from home and temporary dialysis away from home. Some HMOs, called HMO-POS plans, cover certain out-of-network care at a higher cost. Most HMOs have you choose a primary care doctor, and many need a referral before you see a specialist.
• PPO. You can use out-of-network providers for covered services, usually at a higher cost, if the provider agrees to treat you. Medicare suggests asking the plan for a decision before you go, so you know the service is covered.

Will OHSU see me out of network?

Usually not, if your plan has in-network options for the care you need. OHSU says it “generally does not accept out-of-network benefits when in-network options are available.” Its reasons are that without a contract it can't give you a reliable cost estimate, and that federal rules, especially for Medicare Advantage, limit when out-of-network coverage can be used. OHSU also says Medicare Advantage plans don't allow you to pay out of pocket instead for Medicare-covered services.

There is one stated exception. If a service is only available at OHSU in Oregon or the region, OHSU says it will work with your plan to seek approval. That depends on the plan agreeing, case by case. So a PPO's out-of-network coverage tells you what the plan would pay. It doesn't mean OHSU will schedule you.

The hospital and the doctor are separate checks

A plan can include OHSU Hospital and still leave out a particular OHSU doctor or clinic, or the other way around. OHSU's own question to ask your insurer is: “Is OHSU in network for my plan? Is my OHSU health team in network for my plan?” Ask both halves.

The same goes for places people don't always think of as OHSU. Casey Eye Institute and the Knight Cancer Institute are part of OHSU. Hillsboro Medical Center has its own agreement with Regence, and OHSU says it leaves Regence's Medicare Advantage plans too. Look each one up for your plan.

Referrals and prior authorization

Getting into the network is half of it. In many HMOs your primary care doctor has to refer you to an OHSU specialist, and in Medicare's words, non-emergency care outside the network without approval can leave you paying the full cost. Plans can also need to approve some care, medicines or medical equipment in advance, which OHSU's page calls prior authorization. Ask the plan what your OHSU care would need before you choose it.

If you're in the middle of treatment

You can ask your plan for a continuity-of-care exception to keep seeing your OHSU team for a while. OHSU's page on contracts says the request can take a few weeks, so it's fine to ask before the change, and that an approval lasts for set dates or until treatment ends, whichever is shorter. You can also ask the plan for a one-time agreement with OHSU for the care you need. The plan decides both.

Your plan also has to tell you. Medicare's rules give it until 45 days before a primary care or behavioral health provider leaves, with a phone call too, and 30 days before a specialist or hospital leaves, sent to people seen there in the past three months. For a December 31 change, those letters can arrive late in Annual Enrollment, so don't wait for one.

Emergencies are covered

Every Medicare Advantage plan has to cover emergency care at any hospital, in network or not. In an emergency, call 911 or go to the nearest emergency room. OHSU says the same.

Thinking about Original Medicare with a Supplement?

OHSU says it accepts Original Medicare and all Medicare Supplement plans, and Original Medicare has no network to lose. For people who see OHSU a lot, it's worth a look. It also means paying a Supplement premium and joining a separate drug plan, so it isn't the right trade for everyone.

Line up the Supplement before you leave your Medicare Advantage plan. Outside your first Supplement enrollment window, Medicare says there's no federal guarantee a company will sell you a policy, and it may cost more because of your health. A hospital leaving your plan's network isn't one of the situations on Medicare's list that guarantee you one. States can add rights of their own, so ask the Supplement company, or your state's SHIBA program, whether you have one before you drop your plan.

Dates that matter

• Now through December 7. Annual Enrollment. Choose a plan for 2027; it starts January 1.
• December 31, 2026. Last day OHSU is in network for Regence and Aetna Medicare Advantage, per OHSU.
• January 1 to March 31, 2027. If you are in a Medicare Advantage plan on January 1, you can make one change. The new plan starts the first day of the next month.

After that, a hospital leaving your plan's network doesn't by itself open a window to switch. Medicare can open a Special Enrollment Period if it decides a network change is significant, and your plan would then send a notice with the dates. Don't cancel your current plan yourself: enrolling in a new Medicare Advantage plan ends the old one.

Before you change anything: a checklist

1. Your exact 2027 plan. The full name and the plan ID that starts with H, from your Annual Notice of Change or enrollment letter, and the year: 2027, not 2026.
2. The OHSU location and each doctor by name. Marquam Hill, a neighborhood clinic, Casey Eye, the Knight Cancer Institute or Hillsboro Medical Center.
3. Whether each doctor is taking patients on that plan. A clinic can take a plan while one doctor's schedule is closed to it.
4. Network status in the plan's 2027 directory, then confirmed by the plan's member services line.
5. Referral and prior authorization rules for the care you get at OHSU.
6. Your medications and pharmacy. Keeping your doctor doesn't help if the plan's drug list or pharmacy network doesn't work for you.
7. Written confirmation. Write down who you spoke to, the date and any reference number, at the plan and at OHSU. OHSU's billing and insurance line is 503-494-8047.

Medicare's fact sheet Understanding Your Medicare Advantage Plan's Provider Network has more questions worth asking. More on checking a doctor properly.

Under 65 on a Regence individual plan?

That is a different product. OHSU says Regence individual plans, the ones bought on your own rather than through work or Medicare, also lose OHSU on January 1, 2027. Nothing about those plans changes the Medicare picture above, and nothing in the Medicare picture changes them.

Other network changes this season

• Legacy Health leaves Humana Medicare Advantage after December 31, 2026.
• Vancouver Clinic's 2027 Medicare Advantage list goes plan by plan. Vancouver Clinic and OHSU are separate organizations with separate contracts.
• Providence leaves UnitedHealthcare's Medicare Advantage network on January 1, 2027.

Questions people ask

Where this comes from

• OHSU: Billing and insurance (plans we take)
• OHSU: Regence BlueCross BlueShield negotiations and your care
• OHSU: Why OHSU negotiates health insurance contracts
• Multnomah County: 2027 hospital affiliations for Medicare Advantage plans, Multnomah and Clackamas County (PDF, updated October 29, 2026)
• Medicare: Understanding Medicare Advantage Plans (PDF, April 2026)
• Medicare.gov: When can I buy a Medigap policy?
• The insurance companies' public Medicare provider directories, and Medicare's 2027 plan list for each county

Checked November 13, 2026. American Senior Choices is not affiliated with OHSU or with any health system named here. Network contracts change, and a page is only as current as its last check.