Okanogan County covers 5,266 square miles of land, more than any other county in Washington, and runs from the Canadian border at Oroville down to Pateros and across the Methow Valley. For 12,244 people with Medicare (CMS counts, July 2026), that size is the backdrop to everything. If your Medicare Advantage plan is leaving the county after December 31, 2026, the doctors you can reach, the paperwork you mail and the help you can get in person all sit inside a very big map.
Three small hospitals, a lot of miles
The state Department of Health lists three hospitals in Okanogan County, and CMS classifies all three as critical access hospitals:
- Three Rivers Hospital in Brewster
- Mid-Valley Hospital in Omak
- North Valley Hospital in Tonasket
Critical access hospitals are small rural hospitals. If you need specialty care a small hospital doesn't offer, you may already be traveling outside the county for it. So when you compare 2027 coverage, make two lists: the local hospital and clinic you use for everyday care, and the out-of-county specialists or hospital you'd go to for anything bigger. With a Medicare Advantage plan, both lists need to be checked against the 2027 network. With Original Medicare, any U.S. provider that accepts Medicare will do, which helps if your care already ranges across several counties; the trade-off is that Original Medicare alone has no yearly cap on your costs.
Who has Medicare in Okanogan County
| Group | Count | Share of beneficiaries |
|---|---|---|
| Original Medicare | 8,614 | 70.4% |
| Medicare Advantage and other health plans | 3,630 | about 30% |
| Partial dual-eligible (Apple Health helps with Medicare costs) | 1,205 | 9.8% |
| Full dual-eligible (full Apple Health benefits) | 1,122 | 9.2% |
| Under 65, eligible by disability | 1,030 | 8.4% |
| Stand-alone Part D plan | 5,721 | 46.7% |
| Part D inside a Medicare Advantage plan | 3,449 | 28.2% |
Source: CMS Medicare Monthly Enrollment, July 2026. Okanogan County population: 43,500 (OFM, April 1, 2026); 11,707 residents 65 and older, 27.0% (OFM, April 1, 2025).
Seven in ten beneficiaries here use Original Medicare, a much larger share than the statewide 50.3%. Medicare Advantage is the less common arrangement in Okanogan County, and the most common setup here is Original Medicare plus a separate drug plan.
The dual-eligible rows are the ones I'd look at twice. Okanogan is one of only four Washington counties where partial dual-eligibles outnumber full dual-eligibles. Partial duals usually get help through a Medicare Savings Program with premiums or cost-sharing, without full Apple Health. If that describes you, you likely have more protection in this switch than you think, because that help also makes you eligible for Extra Help.
If Apple Health or a Medicare Savings Program helps pay your costs
Qualifying for Medicaid or a Medicare Savings Program means you automatically qualify for Extra Help with drug costs. That changes your 2027 situation in several ways:
- No January drug gap. CMS reassigns Extra Help members from a discontinued Medicare Advantage plan to a stand-alone Part D plan, unless they've already chosen drug coverage for 2027.
- Monthly changes. You can switch stand-alone drug plans once each calendar month, with the change starting the next month. That's a drug plan option only; it doesn't let you move between Medicare Advantage plans.
- No late penalty. Extra Help members don't owe the Part D late enrollment penalty.
- Stopgap coverage. Medicare's LI NET program gives temporary Part D coverage to people who qualify for Extra Help or Medicaid but aren't yet in a drug plan.
If you think you might qualify and haven't applied, HCA says Medicare Savings Programs have no asset test. Apply at washingtonconnection.org or at a DSHS office.
The dates, for everyone
- Through December 31, 2026: your current plan still covers you.
- By December 31: choose 2027 coverage and it starts January 1 with no break. Given mail times in a rural county, I'd aim for mid-December at the latest.
- December 8, 2026 to February 28, 2027: special enrollment period because your plan is ending. January choices start February 1; February choices start March 1.
- January 1, 2027, if you chose nothing: Original Medicare, with no drug plan unless CMS reassigned you through Extra Help.
- March 4, 2027: your Medigap right under RCW 48.66.055 lasts until this date; OIC says apply no earlier than November 1. It only applies if you go to Original Medicare. Eligible plans are A through F (including high-deductible F), K or L for people first eligible before 2020, and A, B, D, G (including high-deductible G), K or L for people first eligible on or after January 1, 2020.
People under 65 should know Medigap access is narrower; federal law doesn't require sales to that group and OIC says options are more limited. The Washington statewide guide has the rest of the detail.
Get these ready before you call anyone
Phone counseling goes faster when you have the facts in front of you, and in a county this size most of your help will come by phone. Have your Medicare card, the plan's termination letter, and a list of your medications with doses. Add the names and towns of every doctor, clinic and hospital you used this year, including any outside Okanogan County. If you get help from Apple Health or a Medicare Savings Program, have that letter too. With those on the table, a SHIBA counselor or 1-800-MEDICARE can run real comparisons on Medicare Plan Finder instead of general ones. Keep the plan's letter with its postmarked envelope afterward; a Medigap insurer can ask for proof of when your coverage ended.
Help in Okanogan County
SHIBA for Okanogan County is sponsored by Action Health Partners, based in East Wenatchee, with a toll-free listing of 888-452-0731. On October 26, OIC's office directory showed it, like every local listing, as not taking appointments, and pointed people to 1-800-MEDICARE (1-800-633-4227). The statewide SHIBA line, 800-562-6900, answers weekdays from 8:30 a.m. to 4:30 p.m. Phone help is the realistic option for most of the county anyway.
Aging & Adult Care of Central Washington is the Area Agency on Aging. Its Community Living Connections office is at 739 Haussler Road in Omak (509-826-7452, toll-free 1-800-572-4459).
Tribal aging office. The state's AAA contact list includes the Colville Indian Area Agency on Aging in Nespelem.
Rides. TranGO, the Okanogan County Transit Authority, runs routes from Oroville to Pateros, Omak and Okanogan, and the Methow Valley, and takes paratransit applications in English and Spanish (509-557-6177). Okanogan County Transportation & Nutrition provides door-to-door service, about 34,800 rides a year by its own count, which can matter if your new coverage points you to a different clinic.
The notices your plan sent control your personal dates, and federal Medicare rules together with Washington law define your rights; confirm your own case with 1-800-MEDICARE, SHIBA or a licensed agent.
Questions from Okanogan County
Which hospitals are in Okanogan County?
I get help with my Medicare premium from the state. Does that change anything?
Is there a tribal aging office in Okanogan County?
Sources
- CMS Medicare Monthly Enrollment, July 2026
- U.S. Census 2025 Gazetteer (land area)
- WA OFM population estimates
- WA DOH hospital data
- WA OIC: Medicare Advantage plan changing or leaving
- WA OIC: Find a local SHIBA office
- CMS CY 2027 Enrollment and Disenrollment Guidance
- Medicare.gov: Part D costs, Extra Help and LI NET
- HCA: Medicare Savings Program
- RCW 48.66.055
- DSHS Area Agency on Aging contact list
- TranGO (Okanogan County Transit Authority)
