Sara M. Wasserbauer, M.D.
Internal Medicine Physician · Antioch, CA
Sara M. Wasserbauer, M.D. is an internal medicine physician with a practice address in Antioch, California, and NPI 1174559074, issued on Jun 23, 2006. Check the license (California A89620, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sara M. Wasserbauer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A89620 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3901 Lone Tree Way, Antioch, CA 94509
- Phone
- (925) 779-7273
- Enumerated
- Jun 23, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3901 Lone Tree Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Danielle Aldrich, NPFamily Nurse Practitioner1467160192
- Katy Alexy, PA-CPhysician Assistant1629544556
- Nazish Ali, M.D.Internal Medicine Physician1932121498
- Maha Amr, M.DNeonatal-Perinatal Medicine Physician1962514141
- Donald Anderson, M.D.Anesthesiology Physician1295755825
Verify Sara M. Wasserbauer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89620Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
394 Medicare Part D claims for 93 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Minoxidil209 claims
- Finasteride120 claims
- Ketoconazole25 claims
- Dutasteride22 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.
Sara M. Wasserbauer among 17,696 internal medicine physician records in California
Sara M. Wasserbauer, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 internal medicine physician records list a practice address in Antioch
They are 66 of the 2,184 NPPES records with a practice address in Antioch, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Antioch → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nazish Ali, M.D.Antioch, CA 945091932121498
- Irina Bronstein, MDAntioch, CA 945091972681039
- Anita Cherian, MDAntioch, CA 945091306924402
- Carl Corrigan, MDAntioch, CA 945091285712349
- Waldo Ferrer, MDAntioch, CA 945091881772978
- P. Gunanayagam, MDAntioch, CA 945091811075997
- Dileep Kumar, M.D.Antioch, CA 945091649290206
- Kishore Maskey, MDAntioch, CA 945091568540631
Common questions
What is Sara M. Wasserbauer, M.D.'s NPI number?
Sara M. Wasserbauer, M.D.'s National Provider Identifier (NPI) is 1174559074, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sara M. Wasserbauer, M.D. located?
The NPPES record lists a practice address at 3901 Lone Tree Way, Antioch, CA, 94509. Phone: (925) 779-7273. Providers update this record themselves, so call before visiting.
How can I verify Sara M. Wasserbauer, M.D.'s license?
NPPES lists California license number A89620, 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 Sara M. Wasserbauer, M.D. prescribe under Medicare Part D?
In 2024, Sara M. Wasserbauer, M.D. had 394 Medicare Part D claims for 93 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.