Gillian Williams, PNP
NPI 1730589169 · Pediatric Nurse Practitioner · Upland, CA
Gillian Williams, PNP is a Pediatric Nurse Practitioner provider in Upland, CA (NPI 1730589169).
Provider details
- NPI number
- 1730589169
- Entity type
- Individual
- Primary specialty
- Pediatric Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PNP
- Sex
- Female
- Sole proprietor
- No
- License
- 664000 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
- 2014-09-04
- Last updated
- 2014-09-04
Frequently asked questions
- What is Gillian Williams's NPI number?
- Gillian Williams's National Provider Identifier (NPI) is 1730589169, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gillian Williams's specialty?
- Gillian Williams is listed in the NPPES registry with a primary specialty of Pediatric Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gillian Williams located?
- Gillian Williams's practice location on file with NPPES is 440 N Mountain Ave, Upland, CA 91786-5183.
- What is Gillian Williams's phone number?
- The practice phone number listed in the NPPES registry for Gillian Williams is (909) 931-1313.
- Is Gillian Williams's NPI active?
- Yes — Gillian Williams's NPI (1730589169) is active in the NPPES registry as of the last update on 2014-09-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.