Diana Williams, FNP
NPI 1174025886 · Family Nurse Practitioner · Los Alamitos, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Williams, FNP is a Family Nurse Practitioner provider in Los Alamitos, CA (NPI 1174025886).
Provider details
- NPI number
- 1174025886
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 95008594 (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
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 4237 Atlantic AveLong Beach, CA 90807-2801Phone: (562) 336-1656
- 123 Atlantic AveLong Beach, CA 90802-5121Phone: (562) 726-1383
Registry dates
- Enumerated
- 2018-03-08
- Last updated
- 2018-04-05
Frequently asked questions
- What is Diana Williams's NPI number?
- Diana Williams's National Provider Identifier (NPI) is 1174025886, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Williams's specialty?
- Diana Williams is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Diana Williams located?
- Diana Williams's practice location on file with NPPES is 4288 Katella Ave, Los Alamitos, CA 90720-3562.
- What is Diana Williams's phone number?
- The practice phone number listed in the NPPES registry for Diana Williams is (562) 256-8514.
- Does Diana Williams accept Medicare?
- Diana Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Williams's NPI active?
- Yes — Diana Williams's NPI (1174025886) is active in the NPPES registry as of the last update on 2018-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.