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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

CATHY RUORAN ZHANG MD
NPI 1316407984
Internal Medicine - Hematology & Oncology in Fresno, CA

Active since March 20, 2019
155 N FRESNO ST, FRESNO, CA 93701(559) 387-1909 Get Directions Write a Review

NPPES record last updated: July 10, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 10, 2026, Mar 29, 2023, Jan 7, 2023 and 1 more (4 updates tracked since 2019).

About Cathy Ruoran Zhang Md NPPES

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

CATHY RUORAN ZHANG MD (NPI 1316407984) is an individual hematology & oncology provider in Fresno, California, licensed in California (A185766) and active in the NPI registry since March 2019.

NPPES Registry Identity

NPI1316407984
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameCATHY RUORAN ZHANGCredential: MD
Location Address155 N FRESNO STFresno, CA 93701-2302
Mailing Address155 N Fresno StFresno, CA 93701-2302 · (559) 387-1909
Phone(559) 387-1909
Sole ProprietorNo
Enumeration DateMarch 20, 2019
Last NPPES UpdateJuly 10, 20264 updates tracked since enumeration
NPPES CertifiedJuly 10, 2026
✔ NPI 1316407984 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · A185766
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal MedicineTaxonomy 207R00000X · License A185766 (CA)
155 N FRESNO ST, Fresno, CA 93701
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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.

SAAJAN BHAKTA DO
Emergency Medicine
155 N FRESNO ST
FRESNO, CA 93701
Fresno County (559) 499-6440
DR. MIKELA MARIYA PADILLA MD
Student in an Organized Health Care Education/Training Program
155 N FRESNO ST
FRESNO, CA 93701
Fresno County (559) 499-6518
KHALED MOHAMMED SALEH ABDULLAH MBBS
Student in an Organized Health Care Education/Training Program
155 N FRESNO ST
FRESNO, CA 93701
Fresno County (559) 499-6400
ANGELA MARON
Student in an Organized Health Care Education/Training Program
155 N FRESNO ST
FRESNO, CA 93701
Fresno County (599) 499-6540
DR. CHETANNA OKPALEKE AMAZU MD
Student in an Organized Health Care Education/Training Program
155 N FRESNO ST
FRESNO, CA 93701
Fresno County (913) 407-8457
DR. NITIKA NARINDER DHIR M.D.
Pediatrics (Adolescent Medicine)
155 N FRESNO ST, STE 326
FRESNO, CA 93701
Fresno County (559) 499-6466
SANG JO HWANG DO
Internal Medicine (Infectious Disease)
155 N FRESNO ST
FRESNO, CA 93701
Fresno County (559) 499-6400
ABBIGAYLE LASZACS
Student in an Organized Health Care Education/Training Program
155 N FRESNO ST
FRESNO, CA 93701
Fresno County (599) 499-6540

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 Cathy Zhang's NPI number?

The NPI number for Cathy Zhang is 1316407984. It was assigned to this individual provider in the NPPES registry on March 20, 2019.

Where is Cathy Zhang located?

Cathy Zhang practices at 155 N Fresno St, Fresno, CA 93701. The listed phone number is (559) 387-1909.

What is Cathy Zhang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for Cathy Zhang was last updated on July 10, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.