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NATHANIEL JEN-SUNG TSAI
NPI 1649070244
Student in an Organized Health Care Education/Training Program in Orange, CA

Active since March 14, 2025
101 THE CITY DR S, ORANGE, CA 92868(714) 456-5691 Get Directions Write a Review

NPPES record last updated: March 25, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 25, 2026, Mar 14, 2025 (2 updates tracked since 2025).

About Nathaniel Jen-sung Tsai NPPES

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

NATHANIEL JEN-SUNG TSAI (NPI 1649070244) is an individual student in an organized health care education/training program in Orange, California and active in the NPI registry since March 2025.

NPPES Registry Identity

NPI1649070244
Entity TypeIndividualMale
Primary Taxonomy390200000X
Provider Legal NameNATHANIEL JEN-SUNG TSAI
Location Address101 THE CITY DR SOrange, CA 92868-3201
Mailing Address101 The City Dr SOrange, CA 92868-3201 · (714) 456-5691
Phone(714) 456-5691
Sole ProprietorYes
Enumeration DateMarch 14, 2025
Last NPPES UpdateMarch 25, 20262 updates tracked since enumeration
NPPES CertifiedMarch 25, 2026
✔ NPI 1649070244 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyStudent in an Organized Health Care Education/Training ProgramStudent, Health Care
Taxonomy Code390200000X
Definition
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
101 THE CITY DR S, Orange, CA 92868
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ANKIT BHUPENDRA PATEL D.O.
Radiology (Diagnostic Radiology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-5113
DR. LAURA CATHERINE SKOCZYLAS MD
Obstetrics & Gynecology
101 THE CITY DR S, BUILDING 56, DEPARTMENT OF OB/GYN
ORANGE, CA 92868
Orange County (714) 456-8224
MICHAEL CHENG DO
Internal Medicine (Rheumatology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7110
AESTHETIC AND PLASTIC SURGERY INSTITUTE
Plastic Surgery
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-2986
JOSEPH VILLARREAL M.D.
Emergency Medicine
101 THE CITY DR S, BUILDING 1A, ROOM 1009
ORANGE, CA 92868
Orange County (714) 456-5239
DEMI TRAN
Psychiatry & Neurology (Neurology)
101 THE CITY DR S, CITY TOWER, SUITE 400
ORANGE, CA 92868
Orange County (171) 456-6693
DR. ISABEL CARLTON CLARK M.D.
Surgery (Trauma Surgery)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7890
DYLAN LUKATO
Emergency Medicine
101 THE CITY DR S
ORANGE, CA 92868
Orange County (415) 218-8041

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 Nathaniel Tsai's NPI number?

The NPI number for Nathaniel Tsai is 1649070244. It was assigned to this individual provider in the NPPES registry on March 14, 2025.

Where is Nathaniel Tsai located?

Nathaniel Tsai practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-5691.

What is Nathaniel Tsai's specialty?

The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.

When was this NPI record last updated?

The NPPES record for Nathaniel Tsai was last updated on March 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.