Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 30 days.

KAREN NISHIYAMA
NPI 1821919762
Physician Assistant in Santa Ana, CA

Active since July 24, 2026
19012 FAIRHAVEN EXT, SANTA ANA, CA 92705(714) 944-6082 Get Directions Write a Review

NPPES record added: July 24, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Karen Nishiyama NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KAREN NISHIYAMA (NPI 1821919762) is an individual physician assistant in Santa Ana, California and active in the NPI registry since July 2026.

NPPES Registry Identity

NPI1821919762
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameKAREN NISHIYAMA
Location Address19012 FAIRHAVEN EXTSanta Ana, CA 92705-1360
Mailing Address19012 Fairhaven ExtSanta Ana, CA 92705-1360
Sole ProprietorYes
Enumeration DateJuly 24, 2026
NPPES CertifiedJuly 24, 2026
NPI 1821919762 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
Definition

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

19012 FAIRHAVEN EXT, Santa Ana, CA 92705

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Karen Nishiyama's NPI number?

The NPI number for Karen Nishiyama is 1821919762. It was assigned to this individual provider in the NPPES registry on July 24, 2026.

Where is Karen Nishiyama located?

Karen Nishiyama practices at 19012 Fairhaven Ext, Santa Ana, CA 92705. The listed phone number is (714) 944-6082.

What is Karen Nishiyama's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

When was this NPI record last updated?

The NPPES record for Karen Nishiyama was last updated on July 24, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.