Gregory JohnsonMD
Internal Medicine, Gastroenterology
2027 Medicare Advantage
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Medicare Advantage plans for Ventura County, CA.
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Directory results See what each insurance company reports
Not listed on the plans we can check
Gregory wasn't listed on the 33 2027 plans whose directories answered in Ventura County, CA. Directories can lag behind, so that isn't proof Gregory is out of network. Ask us to confirm.
The 33 Medicare Advantage plans we show for Ventura County, CA in 2027
- 33 not listed
Alignment Health Plan
Not listed on its 12 plans here. That isn't proof they're out of network.
Anthem Blue Cross · Anthem Blue Cross and Blue Shield · Anthem Blue Cross Partnership Plan
Not listed on its 4 plans here. That isn't proof they're out of network.
Gold Coast Health Plan
Not listed on its 1 plan here. That isn't proof they're out of network.
Humana
Not listed on its 5 plans 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.
Kaiser Permanente
Not listed on its 3 plans here. That isn't proof they're out of network.
SCAN Health Plan
Not listed on its 4 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 Gregory 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 21, 2026
Where they practice
Practice location
- NPI issued
- 2006
- Registry record updated
- Jul 8, 2007
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Is Gregory Johnson in network with Medicare Advantage plans?
Gregory wasn't listed on the 33 2027 plans whose directories answered in Ventura County, CA. Directories can lag, and other plans haven't been confirmed, so ask the office or a Silverpath advisor.
Does Gregory Johnson take Alignment Health Plan Medicare Advantage plans?
The provider searches didn't return a listing for Gregory on these 12 plans for 2027 in Ventura County, CA. Directories can lag, and a clinician can be in network at another office, so that isn't proof Gregory is out of network. Ask the office or a Silverpath advisor to confirm.
Does Gregory Johnson take Anthem Blue Cross Medicare Advantage plans?
The provider searches didn't return a listing for Gregory on these 4 plans for 2027 in Ventura County, CA. Directories can lag, and a clinician can be in network at another office, so that isn't proof Gregory is out of network. Ask the office or a Silverpath advisor to confirm.
Does Gregory Johnson take Gold Coast Health Plan Medicare Advantage plans?
The provider searches didn't return a listing for Gregory on this plan for 2027 in Ventura County, CA. Directories can lag, and a clinician can be in network at another office, so that isn't proof Gregory is out of network. Ask the office or a Silverpath advisor to confirm.
Where does Gregory Johnson practice?
227 W Janss Rd, #215, Thousand Oaks, CA 91360.
How do I confirm Gregory is in my plan's network?
Call the member services number on your plan card and give them the NPI 1952463762, or ask a Silverpath advisor to check for you. It's free.
For providers
Is this your practice?
Patients in Ventura County, CA look up Gregory Johnson 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.