Alexandra Flessel, MD
NPI 1003493701 · Obstetrics & Gynecology Physician · San Mateo, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexandra Flessel, MD is a Obstetrics & Gynecology Physician provider in San Mateo, CA (NPI 1003493701).
Provider details
- NPI number
- 1003493701
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
3 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ibuprofen | 14 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (2)
- 136 N San Mateo Dr Ste 101San Mateo, CA 94401-2779Phone: (650) 344-1114
- 5333 Mcauley Dr Rm 2110Ypsilanti, MI 48197-1097Phone: (734) 712-3967
Registry dates
- Enumerated
- 2021-03-27
- Last updated
- 2025-08-06
- Certified
- 2025-08-06
Frequently asked questions
- What is Alexandra Flessel's NPI number?
- Alexandra Flessel's National Provider Identifier (NPI) is 1003493701, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexandra Flessel's specialty?
- Alexandra Flessel is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Alexandra Flessel located?
- Alexandra Flessel's practice location on file with NPPES is 136 N San Mateo Dr Ste 101, San Mateo, CA 94401-2779.
- What is Alexandra Flessel's phone number?
- The practice phone number listed in the NPPES registry for Alexandra Flessel is (650) 344-1114.
- Does Alexandra Flessel accept Medicare?
- Alexandra Flessel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexandra Flessel's NPI active?
- Yes — Alexandra Flessel's NPI (1003493701) is active in the NPPES registry as of the last update on 2025-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.