Medicare Advantage Plan Terminated in Walla Walla County

Two out of every three people on Medicare in Walla Walla County use Original Medicare. CMS counted 15,018 beneficiaries in the county in July 2026, and only 4,996 of them were in Medicare Advantage and other private health plans. If you are in that smaller group and your plan mailed you a notice that it won't be back in 2027, you have a real choice to make before December 31, and both roads, another Medicare Advantage plan or Original Medicare with a separate drug plan, are open to you.

Walla Walla County beside the statewide picture

CMS counts, July 2026	Walla Walla County	All of Washington
Everyone on Medicare	15,018	1,586,306
In Original Medicare	10,022 (66.7%)	797,700 (50.3%)
In Medicare Advantage or another health plan	4,996 (33.3%)	788,606 (49.7%)
Drug coverage through a stand-alone Part D plan	7,189	503,353
Drug coverage built into a Medicare Advantage plan	4,620	752,773
Also on Apple Health (dual-eligible)	2,190 (14.6%)	239,101 (15.1%)
On Medicare because of a disability	1,216 (8.1%)	127,500 (8.0%)

Source: CMS Medicare Monthly Enrollment, July 2026 (data.cms.gov). These are counts of people, not plans; the private-plan column includes cost plans and PACE. OFM's April 2025 estimate puts the county's 65-and-older population at 14,249, or 22.3% of residents.

What a one-in-three share tells you

Start with the 4,620 figure. Those are the people whose prescriptions run through the same Medicare Advantage plan that covers their doctor visits. That is about 92.5% of the county's private-plan members. When a plan like that ends on December 31, the drug benefit ends with it. Nobody mails you a replacement drug card unless you pick one, or unless you get Extra Help (more on that below).

Now look at the 7,189. That many county residents already pair Original Medicare with a separately purchased drug plan. If you are weighing Original Medicare, the drug plan is the piece to get right, and which one fits depends on your own prescription list, so run it yourself on Medicare Plan Finder or over the phone with 1-800-MEDICARE.

The dual-eligible share, 14.6%, sits close to the state's. If you are one of the 2,190 dual-eligible residents, some of the dates below loosen for you. Skip to the help section near the end.

One licensed hospital, a VA campus, and Oregon next door

The Department of Health's hospital list shows a single licensed hospital in the county: an acute care hospital on West Poplar Street in the city of Walla Walla. Veterans also have the Jonathan M. Wainwright Memorial VA Medical Center on Wainwright Drive. If you use the VA, ask the VA how your benefits fit with whatever Medicare setup you choose for 2027.

Geography matters more here than people expect. The county's southern edge touches Umatilla County, Oregon, and its Washington neighbors are Benton, Franklin and Columbia counties. If you see a specialist in the Tri-Cities or cross the state line for care, here is the practical test:

With another Medicare Advantage plan, you may need to stay in that plan's network for non-emergency care. Call each doctor's office and ask whether they will be in network for that specific plan in 2027. A clinic across the Oregon line may or may not be.
With Original Medicare, you can use any doctor or hospital in the country that takes Medicare.

The Medigap window, laid out for 2026 and 2027

A plan pulling out of the county hands its members a right they don't normally have: the chance to buy certain Medicare Supplement (Medigap) policies with no medical underwriting, provided you land in Original Medicare. During the window an issuer must accept you, must cover conditions you already have, and may not price the policy higher over your health history. That right is the main reason not to let the calendar slide.

Which plans: under RCW 48.66.055, people first eligible for Medicare before 2020 may choose Plans A through F (including high-deductible F), K or L. For anyone first eligible on or after January 1, 2020, the menu is A, B, D, G (including high-deductible G), K or L.
When to apply: OIC, the state insurance regulator, says to send the application on or after November 1. Coverage under a supplement can't kick in while the old plan is still active, so filing in November or December lines it up for New Year's Day.
Last day: the right expires 63 days past the plan's final day, which works out to March 4, 2027 here.
Proof: hang on to the notice and its envelope with the postmark. The issuer may want a copy with your application.

Pick a different Medicare Advantage plan and this right goes unused. After March 4, medical questions are generally back on the table for supplement applications.

The rest of the calendar

Claims keep getting paid by your current plan until the last day of 2026. Open Enrollment, October 15 to December 7, is underway now, and when it closes your notice keeps a door open: a plan-ending special enrollment period stretching from December 8, 2026 to February 28, 2027. Coverage chosen on or before December 31 begins with the new year. Wait until January and the start date becomes February 1; a February pick doesn't start until March 1.

Make no choice and Medicare defaults you to Original Medicare when January arrives. Your Part A and Part B stay in place; prescription coverage doesn't come along, except for Extra Help recipients, whom CMS places in a drug plan automatically. A stretch of 63 days or longer with no creditable drug coverage can saddle you with a late penalty that stays on your premium for as long as you have Medicare drug coverage. The statewide Washington guide to a discontinued Medicare plan walks through each of these rules in more depth.

Who to call from Walla Walla County

SHIBA, the state's free and unbiased Medicare counseling program, lists Catholic Charities Serving Central Washington as the local sponsor for this county; its listing gives an office address in Richland. When I looked at OIC's local SHIBA listings on October 26, 2026, the local offices were marked as not taking appointments, with callers sent to Medicare's toll-free number instead. So go straight to the phone:

Medicare itself answers at 1-800-633-4227 day and night (TTY 1-877-486-2048), closed only on some federal holidays.
SHIBA's statewide number, 800-562-6900, is staffed weekdays from 8:30 to 4:30 (OIC SHIBA page).
Southeast Washington Aging and Long Term Care runs the Community Living Connections office at 125 East Cherry Street, Suite A, in Walla Walla: 509-529-6470 or toll-free 1-888-769-2582. The office serves older adults, persons with disabilities, and their families.

If money is tight, the state's Medicare Savings Programs cover Part B premiums and sometimes more, with no asset test; the application is at washingtonconnection.org. Anyone on Medicaid or Extra Help is also allowed one drug-plan switch per calendar month.

One more practical note for anyone who doesn't drive: Valley Transit, which serves Walla Walla and College Place, currently runs its fixed routes and Dial-a-Ride with zero fares.

The plan's own notice sets your exact dates, and federal Medicare rules plus Washington law decide the rest; before you act, run your own case past Medicare, SHIBA or a licensed agent.

Questions from Walla Walla County

I see doctors across the line in Oregon. Does my plan ending change that?

It can. A replacement Medicare Advantage plan may limit non-emergency care to its network, so ask each Oregon office whether it will be in network for that plan in 2027. Original Medicare lets you use any U.S. provider who takes Medicare.

Most people in Walla Walla County use Original Medicare. Can I switch and still buy a supplement with no medical questions?

Yes. The plan-ending notice triggers a guaranteed issue right under RCW 48.66.055 once you're in Original Medicare. OIC's advice is to apply starting November 1; the right lapses March 4, 2027.

Is the SHIBA office for Walla Walla County booking appointments?

Not when I checked on October 26, 2026: the local listing was marked closed to appointments and referred callers to Medicare. SHIBA's statewide number, 800-562-6900, still takes weekday calls.

I'm dual-eligible. Will my prescriptions stop being covered in January?

Extra Help recipients without 2027 drug coverage lined up get moved by CMS into a separate drug plan when the old plan ends. You're free to pick another one yourself, and dual-eligible people may change drug plans monthly.

Your Medicare Advantage plan is ending in Walla Walla County