Sara Mark, MD
NPI 1417035924 · Obstetrics & Gynecology Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sara Mark, MD is a Obstetrics & Gynecology Physician provider in Walnut Creek, CA (NPI 1417035924).
Provider details
- NPI number
- 1417035924
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A83976 (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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 166 | 84 |
| Estradiolbrand: Estring | 43 | 15 |
| Estradiolbrand: Yuvafem | 34 | 16 |
| Trospium Chloride | 27 | — |
| Progesterone, Micronizedbrand: Progesterone | 20 | — |
| Acyclovir | 14 | — |
| Triamcinolone Acetonide | 13 | — |
| Estradiol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-13
Frequently asked questions
- What is Sara Mark's NPI number?
- Sara Mark's National Provider Identifier (NPI) is 1417035924, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sara Mark's specialty?
- Sara Mark is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Sara Mark located?
- Sara Mark's practice location on file with NPPES is 1425 S Main St, Walnut Creek, CA 94596-5318.
- What is Sara Mark's phone number?
- The practice phone number listed in the NPPES registry for Sara Mark is (925) 295-4000.
- Does Sara Mark accept Medicare?
- Sara Mark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sara Mark's NPI active?
- Yes — Sara Mark's NPI (1417035924) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.