John Reyes-CastanoMD
Internal Medicine, Endocrinology, Diabetes & Metabolism
2027 Medicare Advantage
Check your plan
Medicare Advantage plans for Fairfax County, VA.
Use the name or plan ID on your member card, or choose your insurance company.
Directory results See what each insurance company reports
Not listed on the plans we can check
John wasn't listed on the 42 2027 plans whose directories answered in Fairfax County, VA. Directories can lag behind, so that isn't proof John is out of network. Ask us to confirm.
The 42 Medicare Advantage plans we show for Fairfax County, VA in 2027
- 42 not listed
Aetna Medicare
Not listed on its 6 plans here. That isn't proof they're out of network.
Anthem HealthKeepers
Not listed on its 4 plans here. That isn't proof they're out of network.
Humana
Not listed on its 15 plans here. That isn't proof they're out of network.
Johns Hopkins Advantage MD
Not listed on its 1 plan here. That isn't proof they're out of network.
Kaiser Permanente
Not listed on its 6 plans here. That isn't proof they're out of network.
Sentara Medicare
Not listed on its 2 plans here. That isn't proof they're out of network.
UnitedHealthcare
Not listed on its 8 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 John 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
- 2008
- Registry record updated
- Jan 8, 2022
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Is John Reyes-Castano in network with Medicare Advantage plans?
John wasn't listed on the 42 2027 plans whose directories answered in Fairfax County, VA. Directories can lag, and other plans haven't been confirmed, so ask the office or a Silverpath advisor.
Does John Reyes-Castano take Aetna Medicare Medicare Advantage plans?
The provider searches didn't return a listing for John on these 6 plans for 2027 in Fairfax County, VA. Directories can lag, and a clinician can be in network at another office, so that isn't proof John is out of network. Ask the office or a Silverpath advisor to confirm.
Does John Reyes-Castano take Anthem HealthKeepers Medicare Advantage plans?
The provider searches didn't return a listing for John on these 4 plans for 2027 in Fairfax County, VA. Directories can lag, and a clinician can be in network at another office, so that isn't proof John is out of network. Ask the office or a Silverpath advisor to confirm.
Does John Reyes-Castano take Humana Medicare Advantage plans?
Humana's own provider directory doesn't list John on any of its 15 plans for 2027 in Fairfax County, VA. Directories can lag, and a clinician can be in network at another office, so that isn't proof John is out of network. Ask the office or a Silverpath advisor to confirm.
Where does John Reyes-Castano practice?
6501 Loisdale Ct, Springfield, VA 22150.
How do I confirm John is in my plan's network?
Call the member services number on your plan card and give them the NPI 1073770145, or ask a Silverpath advisor to check for you. It's free.
For providers
Is this your practice?
Patients in Fairfax County, VA look up John Reyes-Castano by plan, and the directories we read don't list this practice yet. 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.