Cosmos BuendasiDNP-FNP
Nurse Practitioner
2027 Medicare Advantage
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Medicare Advantage plans for King County, WA.
Use the name or plan ID on your member card, or choose your insurance company.
Directory results See what each insurance company reports
The 55 Medicare Advantage plans we show for King County, WA in 2027
- 8 list Cosmos
- 47 not listed
Aetna Medicare
6 plans list Cosmos.
Aetna Medicare Eagle (HMO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 16200 116th Ave SE, Renton, WA, 98058
- 400 S 2nd St, Renton, WA, 98057
- 200 S 2nd St, Renton, WA, 98057
- 219 State Ave N, Ste 100, Kent, WA, 98030
- 403 E Meeker St, Ste 200, Kent, WA, 98030
- 4424 S 188th St, Seatac, WA, 98188
- 4040 S 188th St, Ste 201, Seatac, WA, 98188
- 13030 Military Rd S, Ste 200, Tukwila, WA, 98168
- 225 S 152nd St, Burien, WA, 98148
- 26401 Pacific Hwy S, Ste 101, Des Moines, WA, 98198
- 915 Auburn Way N, Ste B, Auburn, WA, 98002
- 923 Auburn Way N, Auburn, WA, 98002
- 10829 8th Ave SW, Ste 400, Seattle, WA, 98146
- 126 Auburn Ave, Ste 300, Auburn, WA, 98002
- 33914 19th Ave SW, Federal Way, WA, 98023
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Eagle (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 16200 116th Ave SE, Renton, WA, 98058
- 400 S 2nd St, Renton, WA, 98057
- 200 S 2nd St, Renton, WA, 98057
- 219 State Ave N, Ste 100, Kent, WA, 98030
- 403 E Meeker St, Ste 200, Kent, WA, 98030
- 4424 S 188th St, Seatac, WA, 98188
- 4040 S 188th St, Ste 201, Seatac, WA, 98188
- 13030 Military Rd S, Ste 200, Tukwila, WA, 98168
- 225 S 152nd St, Burien, WA, 98148
- 26401 Pacific Hwy S, Ste 101, Des Moines, WA, 98198
- 915 Auburn Way N, Ste B, Auburn, WA, 98002
- 923 Auburn Way N, Auburn, WA, 98002
- 10829 8th Ave SW, Ste 400, Seattle, WA, 98146
- 126 Auburn Ave, Ste 300, Auburn, WA, 98002
- 33914 19th Ave SW, Federal Way, WA, 98023
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Signature (HMO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 16200 116th Ave SE, Renton, WA, 98058
- 400 S 2nd St, Renton, WA, 98057
- 200 S 2nd St, Renton, WA, 98057
- 219 State Ave N, Ste 100, Kent, WA, 98030
- 403 E Meeker St, Ste 200, Kent, WA, 98030
- 4424 S 188th St, Seatac, WA, 98188
- 4040 S 188th St, Ste 201, Seatac, WA, 98188
- 13030 Military Rd S, Ste 200, Tukwila, WA, 98168
- 225 S 152nd St, Burien, WA, 98148
- 26401 Pacific Hwy S, Ste 101, Des Moines, WA, 98198
- 915 Auburn Way N, Ste B, Auburn, WA, 98002
- 923 Auburn Way N, Auburn, WA, 98002
- 10829 8th Ave SW, Ste 400, Seattle, WA, 98146
- 126 Auburn Ave, Ste 300, Auburn, WA, 98002
- 33914 19th Ave SW, Federal Way, WA, 98023
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Signature (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 16200 116th Ave SE, Renton, WA, 98058
- 400 S 2nd St, Renton, WA, 98057
- 200 S 2nd St, Renton, WA, 98057
- 219 State Ave N, Ste 100, Kent, WA, 98030
- 403 E Meeker St, Ste 200, Kent, WA, 98030
- 4424 S 188th St, Seatac, WA, 98188
- 4040 S 188th St, Ste 201, Seatac, WA, 98188
- 13030 Military Rd S, Ste 200, Tukwila, WA, 98168
- 225 S 152nd St, Burien, WA, 98148
- 26401 Pacific Hwy S, Ste 101, Des Moines, WA, 98198
- 915 Auburn Way N, Ste B, Auburn, WA, 98002
- 923 Auburn Way N, Auburn, WA, 98002
- 10829 8th Ave SW, Ste 400, Seattle, WA, 98146
- 126 Auburn Ave, Ste 300, Auburn, WA, 98002
- 33914 19th Ave SW, Federal Way, WA, 98023
This result applies to these offices. Other locations are not confirmed.
$0a month
Molina Healthcare of Washington, Inc.
2 plans list Cosmos.
Molina Medicare Complete Care (HMO D-SNP)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 16200 116th Ave SE, Renton, WA, 98058
This result applies to these offices. Other locations are not confirmed.
$6.30a monthMolina Medicare Elect (HMO D-SNP)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 16200 116th Ave SE, Renton, WA, 98058
This result applies to these offices. Other locations are not confirmed.
$8.10a month
Community Health Plan of WA Medicare Advantage
Not listed on its 2 plans here. That isn't proof they're out of network.
Devoted
Not listed on its 6 plans here. That isn't proof they're out of network.
Humana
Not listed on its 13 plans here. That isn't proof they're out of network.
Kaiser Permanente
Not listed on its 4 plans here. That isn't proof they're out of network.
Regence BlueShield
Not listed on its 2 plans here. That isn't proof they're out of network.
UnitedHealthcare
Not listed on its 15 plans here. That isn't proof they're out of network.
Wellcare
Not listed on its 2 plans here. That isn't proof they're out of network.
Wellpoint
Not listed on its 3 plans here. That isn't proof they're out of network.
Premiums are each plan's own monthly premium, as filed with Medicare. You keep paying your Medicare Part B premium.
Can't find your plan?Tell us the plan you have, and a licensed Silverpath advisor will check whether Cosmos takes it. Free.
Original Medicare
Original Medicare status
Most Medicare Supplement (Medigap) policies have no provider network: they help pay Original Medicare's cost sharing where Medicare is accepted. Medicare SELECT policies can require network providers for full benefits. Ask the office whether they accept Medicare.
Medicare enrollment and assignment have not been verified here. Advantage directory results do not answer this question.
No opt-out record in this CMS file. CMS's file covers data through 2026-08-31. This does not establish Medicare enrollment, assignment, or whether the office accepts new Medicare patients.
CMS opt-out source · Data through 2026-08-31 · Reviewed Oct 25, 2026
Where they practice
Practice location
- NPI issued
- 2026
- Registry record updated
- Oct 7, 2026
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Which 2027 Medicare Advantage plans list Cosmos Buendasi?
In King County, WA, 8 Medicare Advantage plans for 2027 list Cosmos in provider data from Medicare.gov or the carrier, including Aetna Medicare Eagle (HMO), Aetna Medicare Eagle (PPO) and Aetna Medicare Signature (HMO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Networks can change during the year, so confirm with the office or the plan before you enroll.
Does Cosmos Buendasi take Aetna Medicare Medicare Advantage plans?
Medicare.gov provider data lists Cosmos on 6 Medicare Advantage plans for 2027 in King County, WA, including Aetna Medicare Eagle (HMO) and Aetna Medicare Eagle (PPO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Aetna Medicare before you enroll.
Does Cosmos Buendasi take Molina Healthcare of Washington, Inc. Medicare Advantage plans?
Medicare.gov provider data lists Cosmos on 2 Medicare Advantage plans for 2027 in King County, WA, including Molina Medicare Complete Care (HMO D-SNP) and Molina Medicare Elect (HMO D-SNP). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Molina Healthcare of Washington, Inc. before you enroll.
Does Cosmos Buendasi take Community Health Plan of WA Medicare Advantage Medicare Advantage plans?
The provider searches didn't return a listing for Cosmos on these 2 plans for 2027 in King County, WA. Directories can lag, and a clinician can be in network at another office, so that isn't proof Cosmos is out of network. Ask the office or a Silverpath advisor to confirm.
Where does Cosmos Buendasi practice?
16200 116th Ave SE, Renton, WA 98058.
How do I confirm Cosmos is in my plan's network?
Call the member services number on your plan card and give them the NPI 1306794441, or ask a Silverpath advisor to check for you. It's free.
For providers
Is this your practice?
What patients see here today:
- Provider searches did not return a listing for Cosmos Buendasi on 47 plans from Community Health Plan of WA Medicare Advantage, Devoted, Humana, Kaiser Permanente, Regence BlueShield, UnitedHealthcare, Wellcare and Wellpoint in King County, WA. Other offices are not confirmed; this isn't proof the practice is out of network.
Tell us which plans you take, or want to take, and we'll keep this page accurate and talk with you about reaching more Medicare patients and carriers.