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Medicare in Oregon

Oregon has strong protections for Medigap enrollees; Nearly half of Medicare beneficiaries in Oregon have Medicare Advantage plans

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Key takeaways

  • More than 21% of Oregon residents are enrolled in Medicare. Of the 909,000 Medicare beneficiaries in the state, nearly 11% are under age 65.
  • Oregon has significant consumer protections related to Medigap plans, with an annual opportunity to switch plans and guaranteed-issue coverage (without higher premiums) for disabled beneficiaries under age 65.
  • More than half of Oregon Medicare beneficiaries opt for Medicare Advantage plans.
  • Oregon has 23 stand-alone Medicare Part D drug plans in 2021, ranging from $8 to $115 per month.

Medicare enrollment in Oregon

As of May 2022, enrollment for Medicare in Oregon stood at 909,151 people, amounting to more than 21% of the state’s population.

Most people become eligible for Medicare when they turn 65. But Medicare eligibility is also triggered when a person has been receiving disability benefits for 24 months, or has ALS or end-stage renal disease. Across the United States, about 12% of all Medicare beneficiaries are under the age of 65; in Oregon, just under 11% of Medicare beneficiaries are eligible due to disability rather than age.

Medicare options

Medicare beneficiaries can choose between Medicare Advantage plans, where coverage is through private health insurance companies, or Original Medicare, where benefits are provided directly by the federal government.

Original Medicare includes Part A (also called hospital insurance, which helps pay for inpatient stays at a hospital, skilled nursing facility, or hospice center) and Part B (also called medical insurance, which helps pay for outpatient care, like physician visits, durable medical equipment, preventive care, kidney dialysis, etc.).

Medicare Advantage plans provide all the benefits of Parts A and B, although cost-sharing amounts are generally different than they’d be with Original Medicare. Medicare Advantage plans usually also include other benefits like Part D prescription drug coverage, and dental and vision coverage. But they also tend to have much narrower provider networks and out-of-pocket costs are usually higher than they’d be with Original Medicare plus a Medigap plan. There are pros and cons to both options.

Medigap in Oregon

Medigap plans are subject to various federal rules, but states also have a lot of say in how the plans operate. Oregon has a rule to ensure that Medigap enrollees aren’t stuck with their plan forever, regardless of their health status. And the state also guarantees access to Medigap plans for Medicare beneficiaries under age 65.

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Medigap plans are standardized at the federal level, and federal law guarantees access to Medigap plans when people turn 65 and enroll in Medicare Part B (you have to also be enrolled in Medicare Part A in order to have Medigap, but the six-month open enrollment period for Medigap plans starts when you are at least 65 and enrolled in Part B).

But unlike Medicare Advantage and Part D, there’s no federal annual open enrollment period for Medigap plans; once that initial six-month window ends, it’s gone forever (except for the limited circumstances that trigger a guaranteed-issue right for Medigap). People who want to switch to a different Medigap plan are generally subject to medical underwriting, so healthy people can change plans, but those with pre-existing medical conditions may not be able to do so. And people under age 65 (who are eligible for Medicare due to a disability or having end-stage renal disease or ALS) are not guaranteed access to Medigap under federal rules.

To address this, Oregon implemented a “birthday rule” in 2013 that allows Medigap enrollees an annual opportunity to change to a plan with equal or fewer benefits during the 30 days following their birthday. The new plan is guaranteed issue during that window.

Oregon also allows Medicare beneficiaries under age 65 a six-month window (after enrolling in Medicare Part B) during which they have a guaranteed-issue right to a Medigap plan. Eligible enrollees can select a Medigap plan with no medical underwriting during a six-month window after they enroll in Medicare Part B, and the premium cannot exceed the premiums that are charged to enrollees who are 65.

As of 2022, there are 29 insurers that offer Medigap plans in Oregon.

There are three approaches to premiums that Medigap insurers can use: Attained-age rating, issue-age rating, and community rating. Oregon does not mandate one or the other, so most insurers in the state use attained-age rating. That means premiums increase as the enrollee gets older. There are a few Medigap insurers that use issue-age rating (premiums are based on the age the person was when they enrolled) and one — UnitedHealthcare/AARP — that uses community rating once a person is 75 years old (ie, a person’s rates will stop increasing due to age once they turn 75).

According to an AHIP analysis, 188,400 Medicare beneficiaries in Oregon had Medigap coverage as of 2020.

Medicare Advantage in Oregon

Medicare Advantage plans allow beneficiaries to obtain their coverage via private plans instead of through Original — or traditional — Medicare (the federal government’s fee-for-service program). These plans are one option for consumers who desire additional benefits beyond what Original Medicare offers, and those who prefer lower total premiums (versus Medigap + stand-alone Part D) in trade for potentially higher out-of-pocket costs and more limited access to medical providers. Medicare Advantage plans are run by private insurers that have more limited provider networks than Original Medicare. Although Medicare Advantage plans have caps on out-of-pocket costs (unlike Original Medicare on its own), the out-of-pocket exposure is generally more than a person would have if they purchased a Medigap plan and Part D plan to supplement Original Medicare.

Nearly 469,000 of Oregon’s Medicare beneficiaries had Medicare Advantage plans as of mid-2022. That’s more than half of the state’s total Medicare population, as opposed to about 46% of Medicare beneficiaries nationwide who have opted for private Medicare coverage (not counting supplemental Medigap and Part D coverage that’s purchased in addition to Original Medicare).

There are Medicare Advantage plans available in all 36 counties in Oregon. But the number of plans for sale varies from as few as two to as many as 56, depending on the county.

Medicare Advantage enrollment is available during the annual election period each fall (October 15 to December 7). And people who are already enrolled in Medicare Advantage plans can also use the Medicare Advantage open enrollment period that runs from January through March. It allows them to switch to a different Medicare Advantage plan or switch to Original Medicare.

Oregon Medicare Part D

Original Medicare does not cover prescription drugs, so most beneficiaries rely on optional Part D coverage to help cover drug costs. Some enrollees have prescription coverage via an employer-sponsored plan, but Medicare Part D plans are available for those who need to obtain their own prescription coverage (prior to 2006, there were some Medigap plans that included prescription coverage; those are no longer for sale, but people who still have them are allowed to keep them).

Medicare Part D was created under the Medicare Modernization Act of 2003.  Medicare Part D coverage can be purchased on a stand-alone basis or integrated with a Medicare Advantage plan (almost nine out of ten Medicare Advantage plans provide coverage for prescription drugs).

As of mid-2022, there were 265,609 Oregon Medicare beneficiaries enrolled in stand-alone Medicare Part D plans. Another 444,899 beneficiaries had Medicare Part D coverage integrated with their Medicare Advantage plans.

For 2022 coverage, there are 23 stand-alone Medicare Part D plans available in Oregon, with premiums ranging from about $8 to $115 per month.

Medicare Part D enrollment is available during Medicare’s annual open enrollment period in the fall (October 15 to December 7). Plan selections made during this window are effective as of the following January.

How does Medicaid provide financial assistance to Medicare beneficiaries in Oregon?

Many Medicare beneficiaries receive financial assistance through Medicaid with the cost of Medicare premiums and services Medicare doesn’t cover – such as long-term care.

Our guide to financial assistance for Medicare enrollees in Oregon includes overviews of these benefits, including Medicare Savings Programs, long-term care coverage, and eligibility guidelines for assistance.

Helpful resources for information about Medicare in Oregon

If you need help with your Medicare application in Oregon or have questions about Medicare eligibility in Oregon, look into one of these resources. You can visit a website and browse for information, or call for more personalized assistance.


Louise Norris is an individual health insurance broker who has been writing about health insurance and health reform since 2006. She has written dozens of opinions and educational pieces about the Affordable Care Act for healthinsurance.org. Her state health exchange updates are regularly cited by media who cover health reform and by other health insurance experts.

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