Allison Merz-HerralaMD
Obstetrics & Gynecology, Complex Family Planning
2027 Medicare Advantage
Check your plan
Medicare Advantage plans for Santa Clara County, CA, Honolulu County, HI and San Francisco 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
Not checked yet
We haven't asked Aetna Medicare, Alignment Health Plan, AlohaCare, Anthem Blue Cross, Astiva Health, Blue Shield of California, CCHP (Chinese Community Health Plan), Devoted, HMSA Akamai Advantage, HMSA Akamai Advantage Dual Care, Humana, Imperial Health Plan of California, Inc., Kaiser Permanente, San Francisco Health Plan, Santa Clara Family Health Plan, SCAN Health Plan, UnitedHealthcare and Wellcare's directories about Allison yet. A Silverpath advisor can check for you now.
The 91 Medicare Advantage plans we show for Santa Clara County, CA, Honolulu County, HI and San Francisco County, CA in 2027
- 91 not checked yet
Aetna Medicare
Not checked yet.
Alignment Health Plan
Not checked yet.
AlohaCare
Not checked yet.
Anthem Blue Cross · Anthem Blue Cross Partnership Plan
Not checked yet.
Astiva Health
Not checked yet.
Blue Shield of California
Not checked yet.
CCHP (Chinese Community Health Plan)
Not checked yet.
Devoted
Not checked yet.
HMSA Akamai Advantage
Not checked yet.
HMSA Akamai Advantage Dual Care
Not checked yet.
Humana
Not checked yet.
Imperial Health Plan of California, Inc.
Not checked yet.
Kaiser Permanente
Not checked yet.
San Francisco Health Plan
Not checked yet.
Santa Clara Family Health Plan
Not checked yet.
SCAN Health Plan
Not checked yet.
UnitedHealthcare
Not checked yet.
Wellcare
Not checked yet.
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 Allison 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 24, 2026
Where they practice
3 practice locations
- NPI issued
- 2020
- Registry record updated
- Sep 14, 2026
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Where does Allison Merz-Herrala practice?
3 locations, including 300 Pasteur Dr, Stanford, CA. All of them are listed on this page.
How do I confirm Allison is in my plan's network?
Call the member services number on your plan card and give them the NPI 1770112492, or ask a Silverpath advisor to check for you. It's free.
For providers
Is this your practice?
Patients can use Silverpath to find practices and check plan networks in Santa Clara County, CA, Honolulu County, HI and San Francisco County, CA. 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.