Shamsi M. Vatannia, MD
Obstetrics & Gynecology Physician · Hayward, CA
Shamsi M. Vatannia, MD is an obstetrics & gynecology physician with a practice address in Hayward, California, and NPI 1790863280, issued on Nov 1, 2006. Check the license (California A96343, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Shamsi M. Vatannia
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A96343 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27212 Calaroga Ave, Hayward, CA 94545
- Phone
- (510) 785-5000
- Enumerated
- Nov 1, 2006
- Record last updated
- Mar 24, 2026
- Medicaid ID
- 00A963430 CA
- Medicare enrollment
- Enrolled (PECOS I20070104000541); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 27212 Calaroga Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Bateman, R.PH.Pharmacist1205913787
- Ralph Boucher, M.D.Cardiovascular Disease Physician1134156912
- Natalie Brooksher, R.N.Registered Nurse1528326881
- Beth Cowan, MDObstetrics & Gynecology Physician1376552059
- Patricia Espicha, R.N.N.P.Ambulatory Women's Health Care Registered Nurse1477576502
- Janice Friesen, L.C.S.W.Clinical Social Worker1770504839
Verify Shamsi M. Vatannia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A96343Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
111 Medicare Part D claims for 41 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Estradiol42 claims
- Venlafaxine Hcl Er12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Golden Valley Health CentersModesto, CA
- Saint Agnes Medical FoundationFresno, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Shamsi M. Vatannia among 5,088 obstetrics & gynecology physician records in California
Shamsi M. Vatannia, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2002 · median 2004 among the 2,700 with a school on file
- Record last updated2026 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Hayward → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Marc Anker, MDHayward, CA 945451376621128
- Daksha Barot, MDHayward, CA 945451700958535
- Beth Cowan, MDHayward, CA 945451376552059
- Michael Fogarty, DOHayward, CA 945451194803957
- Robyn Goodfellow, MDHayward, CA 945451740368505
- Setareh Hafezi, M.D.Hayward, CA 945451285807495
- Robert Hosang, MDHayward, CA 945451558449306
- Senzan Hsu, M.D.Hayward, CA 945451184677940
Common questions
What is Shamsi M. Vatannia, MD's NPI number?
Shamsi M. Vatannia, MD's National Provider Identifier (NPI) is 1790863280, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Shamsi M. Vatannia, MD located?
The NPPES record lists a practice address at 27212 Calaroga Ave, Hayward, CA, 94545. Phone: (510) 785-5000. Providers update this record themselves, so call before visiting.
How can I verify Shamsi M. Vatannia, MD's license?
NPPES lists California license number A96343, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Shamsi M. Vatannia, MD prescribe under Medicare Part D?
In 2024, Shamsi M. Vatannia, MD had 111 Medicare Part D claims for 41 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.