Elizabeth Williams, MD
NPI 1558398313 · Family Medicine Physician · Mountain View, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elizabeth Williams, MD is a Family Medicine Physician provider in Mountain View, CA (NPI 1558398313).
Provider details
- NPI number
- 1558398313
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G57091 (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
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-27
- Last updated
- 2011-12-23
Frequently asked questions
- What is Elizabeth Williams's NPI number?
- Elizabeth Williams's National Provider Identifier (NPI) is 1558398313, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Elizabeth Williams's specialty?
- Elizabeth Williams is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Elizabeth Williams located?
- Elizabeth Williams's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is Elizabeth Williams's phone number?
- The practice phone number listed in the NPPES registry for Elizabeth Williams is (650) 404-8370.
- Does Elizabeth Williams accept Medicare?
- Elizabeth Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Elizabeth Williams's NPI active?
- Yes — Elizabeth Williams's NPI (1558398313) is active in the NPPES registry as of the last update on 2011-12-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.