Peggy W. Hsu, MD
Obstetrics & Gynecology Physician · Pleasanton, CA
Peggy W. Hsu, MD is an obstetrics & gynecology physician with a practice address in Pleasanton, California, and NPI 1285712372, issued on Nov 2, 2006. Check the license (California A77634, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peggy W. Hsu
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A77634 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7601 Stoneridge Dr, Pleasanton, CA 94588
- Phone
- (925) 847-5000
- Enumerated
- Nov 2, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A776340 CA
- Medicare enrollment
- Enrolled (PECOS I20040723000259); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 7601 Stoneridge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yvonne Alger, NPWomen's Health Nurse Practitioner1083609283
- Ana Amog, MDInternal Medicine Physician1083766893
- Deborah Ansley, MDObstetrics & Gynecology Physician1336227412
- Laura Balassone, R.N.P.Adult Health Nurse Practitioner1063523843
- Parvathi Banda, MDInternal Medicine Physician1932247939
- Vijay Bhat, M.D.Internal Medicine Physician1689120560
Verify Peggy W. Hsu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77634Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
231 Medicare Part D claims for 122 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Estradiol67 claims
- Estring26 claims
- Yuvafem24 claims
- Clobetasol Propionate18 claims
- Triamcinolone Acetonide14 claims
- Progesterone12 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 one group practice
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peggy W. Hsu among 5,088 obstetrics & gynecology physician records in California
Peggy W. Hsu, 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
- Graduated2000 · median 2004 among the 2,700 with a school on file
- Record last updated2021 · 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).
31 obstetrics & gynecology physician records list a practice address in Pleasanton
They are 31 of the 2,213 NPPES records with a practice address in Pleasanton, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Pleasanton → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Deborah Ansley, MDPleasanton, CA 945881336227412
- Pushpa Dalal, MDPleasanton, CA 945881013089408
- Todd Dillard, MDPleasanton, CA 945881346328424
- Hanh-Nguyen Do, MDPleasanton, CA 945881003907338
- Janis Kahn, MDPleasanton, CA 945881558449629
- Tun Lee, M.D.Pleasanton, CA 945881518983519
- William Phillips, M.D.Pleasanton, CA 945881538188198
- Gul Qidwai, MDPleasanton, CA 945881801974985
Common questions
What is Peggy W. Hsu, MD's NPI number?
Peggy W. Hsu, MD's National Provider Identifier (NPI) is 1285712372, issued on Nov 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Peggy W. Hsu, MD located?
The NPPES record lists a practice address at 7601 Stoneridge Dr, Pleasanton, CA, 94588. Phone: (925) 847-5000. Providers update this record themselves, so call before visiting.
How can I verify Peggy W. Hsu, MD's license?
NPPES lists California license number A77634, 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 Peggy W. Hsu, MD prescribe under Medicare Part D?
In 2024, Peggy W. Hsu, MD had 231 Medicare Part D claims for 122 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.