Provider networks in Washington.
InPlan holds provider listings for 30 Medicare Advantage plans that serve Washington. Ask whether a plan lists a provider and get the answer with its source type and the date we read the directory.
- MEDICARE ADVANTAGE PLANS
- 30
- PLAN YEARS
- 2027
- INSURERS AND PLAN ORGANIZATIONS
- 5
- LATEST READ
- 2026-10-29
What we hold in Washington.
Plans whose provider directories list providers in our data.
| MARKET | PLANS | INSURERS | PLAN YEARS | LATEST READ |
|---|---|---|---|---|
| Medicare Advantage | 30 | 5 | 2027 | 2026-10-29 |
How we count: a plan counts when its provider directory lists at least one provider in our data. A provider-plan link is one listing of one provider in one plan. For marketplace plans it counts each plan year and network tier the directory gives; for Medicare Advantage plans it counts each provider once per plan.
Insurers in Washington.
Plans with provider listings for each insurer or plan organization, as they publish their names. A Medicare Advantage plan counts in every state it serves.
| INSURER | MARKET | PLANS |
|---|---|---|
| Devoted Health | Medicare Advantage | 22 |
| Molina Healthcare | Medicare Advantage | 3 |
| AgeRight Advantage | Medicare Advantage | 2 |
| Community Health Plan of WA Medicare Advantage | Medicare Advantage | 2 |
| HealthSpring | Medicare Advantage | 1 |
Who the Medicare Advantage directories list.
More than 40,000 providers who practise in Washington appear in the Medicare Advantage plans we hold. The most common primary specialties among them:
- Nurse Practitioner5,372
- Physician Assistant3,040
- Family Practice2,649
- Dentist2,376
- Mental Health Counselor2,213
- Physical Therapist in Private Practice2,212
- Clinical Social Worker1,580
- Internal Medicine1,403
Specialties as the national provider registries record them. A provider counts once per specialty.
Example plans in Washington.
Plans with the most provider-plan links, with the plan ID the API takes. Look any plan ID up for free with the plan ID lookup.
| PLAN | PLAN ID | YEAR | TYPE | PROVIDER-PLAN LINKS |
|---|---|---|---|---|
| HealthSpring Preferred (HMO)HealthSpring | H4407-033-000 | 2027 | Medicare AdvantageHMO | 187,407 |
| AgeRight Advantage Health Plan (HMO I-SNP)AgeRight Advantage | H1372-001-000 | 2027 | Medicare AdvantageHMO I-SNP · Special Needs Plan | 15,593 |
| Molina Medicare Complete Care (HMO D-SNP)Molina Healthcare of Washington, Inc. | H5823-013-001 | 2027 | Medicare AdvantageHMO D-SNP · Special Needs Plan | 69,956 |
| AgeRight Advantage Plus Health Plan (HMO I-SNP)AgeRight Advantage | H1372-002-000 | 2027 | Medicare AdvantageHMO I-SNP · Special Needs Plan | 15,593 |
| Devoted C-SNP Enhanced 003 WA (HMO C-SNP)Devoted Health | H3515-003-000 | 2027 | Medicare AdvantageHMO C-SNP · Special Needs Plan | 15,064 |
A real Washington answer.
Rita A. Kostelik, NP, who practises in Mukilteo, is listed in H4407-033-000. This is the answer the API gives today for that pair, with its source type and the date we read the listing.
curl -H "Authorization: Bearer $INPLAN_KEY" \ "https://api.inplan.io/v1/check?npi=1003009135&plan_id=H4407-033-000"
{
"npi": "1003009135",
"plan_id": "H4407-033-000",
"market": "ma",
"in_network": true,
"answer": "listed",
"plan_year": 2027,
"source": { "type": "plan_directory", "as_of": "2026-10-29" }
}Rita A. Kostelik, NP
Nurse Practitioner · Mukilteo, WA
Listed
- PLAN
- HealthSpring Preferred (HMO)
- INSURER
- HealthSpring
- MARKET
- Medicare Advantage, plan year 2027
- PLAN TYPE
- HMO
- SOURCE
- plan_directory · read 2026-10-29
Every Washington provider, with every plan that lists them.
The Washington data file is one CSV: one row for each provider and plan pair, for every provider practising in Washington, with the source type and read date on each row.
Check Washington providers in your own product.
Send an NPI and a plan ID, get an answer with its evidence. Or ask for every plan that lists a provider. A free key gives 500 calls a month.
Other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Puerto Rico
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Virginia
- West Virginia
- Wisconsin
- Wyoming
Figures counted 2026-10-30. Sources: provider directories published by insurers and plans; public plan and provider registries. InPlan is independent and not affiliated with any insurer named here.