Margaret Mahony, MD
NPI 1457572414 · Gynecology Physician · Santa Clara, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Mahony, MD is a Gynecology Physician provider in Santa Clara, CA (NPI 1457572414).
Provider details
- NPI number
- 1457572414
- Entity type
- Individual
- Primary specialty
- Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G56158 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiolbrand: Climara | 70 | 21 |
| Estradiol | 61 | 31 |
| Progesterone, Micronizedbrand: Progesterone | 55 | 20 |
| Estradiolbrand: Dotti | 39 | 18 |
| Estradiolbrand: Yuvafem | 24 | 14 |
| Estradiolbrand: Estradiol (twice Weekly) | 22 | 13 |
| Medroxyprogesterone Acetate | 14 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-01
- Last updated
- 2021-12-20
Frequently asked questions
- What is Margaret Mahony's NPI number?
- Margaret Mahony's National Provider Identifier (NPI) is 1457572414, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Mahony's specialty?
- Margaret Mahony is listed in the NPPES registry with a primary specialty of Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Mahony located?
- Margaret Mahony's practice location on file with NPPES is 710 Lawrence Expy, Santa Clara, CA 95051-5173.
- What is Margaret Mahony's phone number?
- The practice phone number listed in the NPPES registry for Margaret Mahony is (408) 851-1000.
- Does Margaret Mahony accept Medicare?
- Margaret Mahony is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Mahony's NPI active?
- Yes — Margaret Mahony's NPI (1457572414) is active in the NPPES registry as of the last update on 2021-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.