Ji Won AhnMD
Dermatology, MOHS-Micrographic Surgery
2027 Medicare Advantage
Check your plan
Medicare Advantage plans for Contra Costa County, CA.
Use the name or plan ID on your member card, or choose your insurance company.
Directory results See what each insurance company reports
The 10 Medicare Advantage plans we show for Contra Costa County, CA in 2027
- 1 lists Ji Won
- 9 not listed
Kaiser Permanente
1 plan lists Ji Won; not listed on 2 other plans.
Kaiser Permanente Dual Complete North P17 (HMO D-SNP)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 320 Lennon Ln, Walnut Creek, CA, 94598
This result applies to these offices. Other locations are not confirmed.
$0a month
Contra Costa Health Care Plus (HMO D-SNP)
Not listed on its 1 plan here. That isn't proof they're out of network.
Humana
Not listed on its 1 plan here. That isn't proof they're out of network.
Imperial Health Plan of California, Inc.
Not listed on its 4 plans here. That isn't proof they're out of network.
UnitedHealthcare
Not listed on its 1 plan 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 Ji Won 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
- 2016
- Registry record updated
- Oct 30, 2024
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Which 2027 Medicare Advantage plans list Ji Won Ahn?
In Contra Costa County, CA, 1 Medicare Advantage plan for 2027 lists Ji Won in provider data from Medicare.gov or the carrier, including Kaiser Permanente Dual Complete North P17 (HMO D-SNP). 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 Ji Won Ahn take Kaiser Permanente Medicare Advantage plans?
Medicare.gov provider data lists Ji Won on one Medicare Advantage plan for 2027 in Contra Costa County, CA: Kaiser Permanente Dual Complete North P17 (HMO D-SNP). 2 other plans did not return a listing in the search area. CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Kaiser Permanente before you enroll.
Does Ji Won Ahn take Contra Costa Health Care Plus (HMO D-SNP) Medicare Advantage plans?
The provider searches didn't return a listing for Ji Won on this plan for 2027 in Contra Costa County, CA. Directories can lag, and a clinician can be in network at another office, so that isn't proof Ji Won is out of network. Ask the office or a Silverpath advisor to confirm.
Does Ji Won Ahn take Humana Medicare Advantage plans?
Humana's own provider directory doesn't list Ji Won on its one plan for 2027 in Contra Costa County, CA. Directories can lag, and a clinician can be in network at another office, so that isn't proof Ji Won is out of network. Ask the office or a Silverpath advisor to confirm.
Where does Ji Won Ahn practice?
320 Lennon Ln Dept of, Walnut Creek, CA 94598.
How do I confirm Ji Won is in my plan's network?
Call the member services number on your plan card and give them the NPI 1023460243, 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 Ji Won Ahn on 7 plans from Contra Costa Health Care Plus (HMO D-SNP), Humana, Imperial Health Plan of California, Inc. and UnitedHealthcare in Contra Costa County, CA. 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.