NPPES file of Aug 9, 2026

Senzan Hsu, M.D.

Obstetrics & Gynecology Physician · Hayward, CA

Senzan Hsu, M.D. is an obstetrics & gynecology physician with a practice address in Hayward, California, and NPI 1184677940, issued on May 19, 2006. Check the license (California A70309, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1184677940
Name
Senzan Hsu
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
A70309 CA
Self-reported in NPPES; status is on the state search
Practice location
27225 Calaroga Ave, Hayward, CA 94545
Phone
(510) 342-0020
Enumerated
May 19, 2006
Record last updated
Aug 29, 2023
Fax
(510) 342-0022
Medicaid ID
1184677940 CA
Medicare enrollment
Enrolled (PECOS I20060720000390); accepts Medicare assignment
Medical or professional school
University Of Pittsburgh School Of Medicine, 1996
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →

Also registered at 27225 Calaroga Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Elena Chan, MDObstetrics & Gynecology Physician1346738267
  2. Malcolm Garfinkle, M.D.Surgery Physician1215125638
  3. Kenya Numan, M.D.Obstetrics Physician1568501948
  4. Anjalika Pattanaik, MDObstetrics & Gynecology Physician1831294339
  5. Pamela Simons, MDObstetrics & Gynecology Physician1124188115
  6. Daphne Singh, NP-CObstetrics & Gynecology Physician1386288090

Verify Senzan Hsu in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A70309    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Obhg California PCTurlock, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Senzan Hsu among 5,088 obstetrics & gynecology physician records in California

Senzan Hsu, M.D. 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
  • Graduated1996 · median 2004 among the 2,700 with a school on file
  • Record last updated2023 · 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

  1. Marc Anker, MDHayward, CA 945451376621128
  2. Daksha Barot, MDHayward, CA 945451700958535
  3. Beth Cowan, MDHayward, CA 945451376552059
  4. Michael Fogarty, DOHayward, CA 945451194803957
  5. Robyn Goodfellow, MDHayward, CA 945451740368505
  6. Setareh Hafezi, M.D.Hayward, CA 945451285807495
  7. Robert Hosang, MDHayward, CA 945451558449306
  8. Jaya Mokkapati, MDHayward, CA 945451972681732

Common questions

What is Senzan Hsu, M.D.'s NPI number?

Senzan Hsu, M.D.'s National Provider Identifier (NPI) is 1184677940, issued on May 19, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Senzan Hsu, M.D. located?

The NPPES record lists a practice address at 27225 Calaroga Ave, Hayward, CA, 94545. Phone: (510) 342-0020. Providers update this record themselves, so call before visiting.

How can I verify Senzan Hsu, M.D.'s license?

NPPES lists California license number A70309, 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.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.