Gabrielle S. Schaefer, MD
Obstetrics & Gynecology Physician · Pleasanton, CA
Gabrielle S. Schaefer, MD is an obstetrics & gynecology physician with a practice address in Pleasanton, California, and NPI 1427128016, issued on Nov 9, 2006. Check the license (California A87289, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gabrielle S. Schaefer
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A87289 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5575 W Las Positas Blvd Ste 330, Pleasanton, CA 94588
- Phone
- (925) 734-3333
- Enumerated
- Nov 9, 2006
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (925) 734-9294
- Medicaid ID
- 00A872890 CA
- Medicare enrollment
- Enrolled (PECOS I20040813000320); 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 5575 W Las Positas Blvd Ste 330
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danielle Beharie, D.O., M.P.H.Obstetrics & Gynecology Physician1902267867
- Charlene Hu, MDNeurology Physician1770560013
- Zachary Roberts, MDNeurology Physician1811423908
- Rebecca Stone, MDObstetrics & Gynecology Physician1336342385
Verify Gabrielle S. Schaefer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A87289Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
73 Medicare Part D claims for 50 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Fluconazole17 claims
- Estradiol16 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 IncSan Leandro, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gabrielle S. Schaefer among 5,088 obstetrics & gynecology physician records in California
Gabrielle S. Schaefer, 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
- Graduated1996 · 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
- Peggy Hsu, MDPleasanton, CA 945881285712372
- Janis Kahn, MDPleasanton, CA 945881558449629
- Tun Lee, M.D.Pleasanton, CA 945881518983519
- William Phillips, M.D.Pleasanton, CA 945881538188198
Common questions
What is Gabrielle S. Schaefer, MD's NPI number?
Gabrielle S. Schaefer, MD's National Provider Identifier (NPI) is 1427128016, issued on Nov 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gabrielle S. Schaefer, MD located?
The NPPES record lists a practice address at 5575 W Las Positas Blvd Ste 330, Pleasanton, CA, 94588. Phone: (925) 734-3333. Providers update this record themselves, so call before visiting.
How can I verify Gabrielle S. Schaefer, MD's license?
NPPES lists California license number A87289, 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 Gabrielle S. Schaefer, MD prescribe under Medicare Part D?
In 2024, Gabrielle S. Schaefer, MD had 73 Medicare Part D claims for 50 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.