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State guide

Oregon Medicare Supplement Plans

Oregon gives residents a birthday rule, so a policyholder can change carriers each year without answering health questions. Rates are attained age, and the market splits between the Willamette Valley and a much thinner rural east.

Figures reviewed for 2026

How premiums are rated
Attained age, with an annual birthday rule
Your six-month window
Begins the month you are 65 and enrolled in Part B
State regulator
Oregon Division of Financial Regulation

What matters

What Medigap costs in Oregon

Portland, Salem and Eugene carry the deepest competition, and the coastal and eastern counties carry the least. The same plan letter can price differently by county, and some carriers do not write outside the valley.

Oregon does not community rate, so premiums rise with age regardless of the birthday rule. The rule protects against a carrier that raises rates aggressively, but it does not change the underlying age curve, so compare the rate at 75 as well as the first-year quote.

The rules that decide what you can buy in Oregon

Oregon requires insurers to offer a Medicare supplement without medical underwriting from 30 days before your birthday through 30 days after, limited to equal or lesser benefits at any carrier. You cannot use it to move up to a richer plan.

Confirm the exact dates with the Division of Financial Regulation before you rely on the window. Requests made a few weeks late are treated as new applications and subject to health questions.

Who buys Medigap in Oregon

Advantage penetration in Oregon is moderate, heavier in the Portland metro and lighter in the rural counties where plan offerings are limited. The supplement pool is stable, and the state's seniors are comparatively healthy, which keeps premiums near the national median.

Where to check before you buy in Oregon

SHIBA counselors compare plans free of charge and the Division of Financial Regulation publishes rate filings and complaint data. Ask them to confirm the birthday rule timing and to price your current letter at every carrier in your county.

Switching without health questions

The birthday rule in Oregon

Each year you can apply for another supplement during a window that runs 30 days before your birthday through 30 days after, with any carrier, for equal or lesser benefits.

How the state switching rules compare

Compare Oregon quotes with a licensed agent

We quote the carriers filed in Oregon against your age, county, tobacco status and household discounts, at no cost to you. Every plan letter is standardized, so the company and the rate history are the real decision.

Other state guides

Rules change at the state line, and so does the carrier list. These are the guides closest to Oregon.

See all West and national state guides

Weighing a network plan instead? Read Medicare Advantage plans in Oregon and compare what each route would cost you.

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