Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Diana Lynne Williams, FNP

Individual provider Family Nurse Practitioner · NPI 1174025886

Diana Lynne Williams, FNP is a Nurse Practitioner in Los Alamitos, California. Qualified in 2017, 9 years ago. Practices with Oneil Enterprises Inc, a 16-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
9
Licensed in
CA
In the registry since
2018
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

4288 Katella Ave
Los Alamitos, CA 90720-3562
Phone: (562) 256-8514
Fax: (562) 296-8561
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 123 Atlantic Ave, Long Beach, CA 90802-5121 — (562) 726-1383
  • 4237 Atlantic Ave, Long Beach, CA 90807-2801 — (562) 336-1656

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 95008594 (CA)

Record details

NPI number1174025886
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorNo
NPI enumeratedMarch 8, 2018
Last updated in NPPESApril 5, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Oneil Enterprises Inc — 16 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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