Alexandra Elizabeth Flessel, MD
Obstetrics & Gynecology Physician · San Mateo, CA
Alexandra Elizabeth Flessel, MD is an obstetrics & gynecology physician with a practice address in San Mateo, California, and NPI 1003493701, issued on Mar 27, 2021. Check the license (California A203951, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexandra Elizabeth Flessel
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A203951 CA
Self-reported in NPPES; status is on the state search - Practice location
- 136 N San Mateo Dr Ste 101, San Mateo, CA 94401
- Phone
- (650) 344-1114
- Enumerated
- Mar 27, 2021
- Record last updated
- Aug 6, 2025
- Medicare enrollment
- Enrolled (PECOS I20250825002122); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 136 N San Mateo Dr Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sandra Beretta, MDObstetrics & Gynecology Physician1568573889
- Melissa Duncanson, MDObstetrics & Gynecology Physician1144753443
- Henry Hamilton, M.D.Obstetrics & Gynecology Physician1417927534
Verify Alexandra Elizabeth Flessel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A203951Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
67 Medicare Part D claims for 31 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Ibuprofen14 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
- Ucsf Health Medical FoundationOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexandra Elizabeth Flessel among 5,088 obstetrics & gynecology physician records in California
Alexandra Elizabeth Flessel, 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 2021, is newer than 96% of them.
- NPI issued2021 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2021 · median 2004 among the 2,700 with a school on file
- Record last updated2025 · 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 San Mateo → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Shelley Adams, MDSan Mateo, CA 944011891801932
- Maryam Arjomand, M.D.San Mateo, CA 944011689763781
- Sandra Beretta, MDSan Mateo, CA 944011568573889
- Beatrice Burke, MDSan Mateo, CA 944011033298625
- Melissa Duncanson, MDSan Mateo, CA 944011144753443
- Henry Hamilton, M.D.San Mateo, CA 944011417927534
- Elizabeth Murphy, MDSan Mateo, CA 944011942311261
- Susan Spencer, MDSan Mateo, CA 944011477664795
Common questions
What is Alexandra Elizabeth Flessel, MD's NPI number?
Alexandra Elizabeth Flessel, MD's National Provider Identifier (NPI) is 1003493701, issued on Mar 27, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Alexandra Elizabeth Flessel, MD located?
The NPPES record lists a practice address at 136 N San Mateo Dr Ste 101, San Mateo, CA, 94401. Phone: (650) 344-1114. Providers update this record themselves, so call before visiting.
How can I verify Alexandra Elizabeth Flessel, MD's license?
NPPES lists California license number A203951, 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 Alexandra Elizabeth Flessel, MD prescribe under Medicare Part D?
In 2024, Alexandra Elizabeth Flessel, MD had 67 Medicare Part D claims for 31 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.