CHUN YEN HSU, M.D., PROFESSIONAL CORPORATION
NPI 1013943554
Internal Medicine - Gastroenterology in Monterey Park, CA

Q: What is Chun Yen Hsu, M.D., Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since June 25, 2006

600 N GARFIELD AVE, STE 310, MONTEREY PARK, CA 91754(626) 573-9979(626) 573-1822 Get Directions Write a Review

NPPES record last updated: November 6, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Chun Yen Hsu, M.d., Professional Corporation NPPES

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

CHUN YEN HSU, M.D., PROFESSIONAL CORPORATION (NPI 1013943554) is a healthcare organization registered as a gastroenterology in Monterey Park, California and active in the NPI registry since June 2006. The organization lists Chun Yen Hsu, President, as its authorized official.

NPPES Registry Identity

NPI1013943554

Entity TypeOrganization

Primary Taxonomy207RG0100X

Legal Business NameCHUN YEN HSU, M.D., PROFESSIONAL CORPORATION

Location Address600 N GARFIELD AVE, STE 310Monterey Park, CA 91754-1172

Mailing Address600 N Garfield Ave, Ste 310Monterey Park, CA 91754-1172 · (626) 573-9979 · Fax (626) 573-1822

Phone(626) 573-9979

Fax(626) 573-1822

Organization SubpartNo

Authorized OfficialChun Yen HsuPresident · (626) 573-9979

Enumeration DateJune 25, 2006

Last NPPES UpdateNovember 6, 2025

NPPES CertifiedNovember 6, 2025

✔ NPI 1013943554 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · A37929

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

600 N GARFIELD AVE, STE 310, Monterey Park, CA 91754

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Other Identifiers 1

MedicaidA379290CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Chun Yen Hsu, M.d., Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Chun Yen Hsu, M.D., Professional Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Chun Hsu, M.D.

Gastroenterology

NPI 1902831894

600 N GARFIELD AVE #310
Monterey Park, CA 91754

(626) 573-9979

✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Chun Yen Hsu, M.D., Professional Corporation's NPI number?

The NPI number for Chun Yen Hsu, M.D., Professional Corporation is 1013943554. It was assigned to this organization in the NPPES registry on June 25, 2006.

Where is Chun Yen Hsu, M.D., Professional Corporation located?

Chun Yen Hsu, M.D., Professional Corporation is located at 600 N Garfield Ave, Ste 310, Monterey Park, CA 91754. The listed phone number is (626) 573-9979.

What is Chun Yen Hsu, M.D., Professional Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Chun Yen Hsu, M.D., Professional Corporation enrolled in Medicare?

Yes. Chun Yen Hsu, M.D., Professional Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Chun Yen Hsu, M.D., Professional Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Gastroenterology) reassigns their Medicare billing to Chun Yen Hsu, M.D., Professional Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Chun Yen Hsu, M.D., Professional Corporation was last updated on November 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.