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

Tomoko Hirabayashi Williams, MSN, RN, FNP-C

Individual provider Family Nurse Practitioner · NPI 1255896262

Tomoko Hirabayashi Williams, MSN, RN, FNP-C is a Nurse Practitioner in Irvine, California. Qualified in 2018, 8 years ago. Practices with City of Hope Medical Foundation, a 959-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California and Texas.

Years since qualifying
8
Licensed in
CA, TX
In the registry since
2019
Specialties on file
2
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1000 Fivepoint
Irvine, CA 92618-2621
Phone: (800) 826-4673
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence NP95037243 (CA)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence AP140322 (TX)

Record details

NPI number1255896262
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , RN , FNP-C
Sole proprietorNo
NPI enumeratedFebruary 4, 2019
Last updated in NPPESFebruary 6, 2026
Certification dateFebruary 6, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice City Of Hope Medical Foundation — 959 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in Irvine