Mary Williams, RN, MS, FNP
NPI 1174602825 · Nurse Practitioner · Walnut Creek, CA
Mary Williams, RN, MS, FNP is a Nurse Practitioner provider in Walnut Creek, CA (NPI 1174602825).
Provider details
- NPI number
- 1174602825
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RN, MS, FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 412931-6857 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-03
- Last updated
- 2018-02-21
Frequently asked questions
- What is Mary Williams's NPI number?
- Mary Williams's National Provider Identifier (NPI) is 1174602825, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Williams's specialty?
- Mary Williams is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Williams located?
- Mary Williams's practice location on file with NPPES is 1776 Ygnacio Valley Rd Ste 208, Walnut Creek, CA 94598-3125.
- What is Mary Williams's phone number?
- The practice phone number listed in the NPPES registry for Mary Williams is (925) 937-0995.
- Is Mary Williams's NPI active?
- Yes — Mary Williams's NPI (1174602825) is active in the NPPES registry as of the last update on 2018-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.