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RAY HSIAO MD INC
NPI 1710062401
Internal Medicine in Hacienda Heights, CA

Active since October 25, 2006
1850 S AZUSA AVE, SUITE 308, HACIENDA HEIGHTS, CA 91745(626) 854-7866(626) 820-0666 Get Directions Write a Review

NPPES record last updated: September 30, 2011. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ray Hsiao Md Inc NPPES

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

RAY HSIAO MD INC (NPI 1710062401) is a healthcare organization registered as an internal medicine in Hacienda Heights, California and active in the NPI registry since October 2006. The organization lists Ray Hsaio, President, as its authorized official.

NPPES Registry Identity

NPI1710062401
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameRAY HSIAO MD INC
Location Address1850 S AZUSA AVE, SUITE 308Hacienda Heights, CA 91745-6813
Mailing Address1850 S Azusa Ave, Suite 308Hacienda Heights, CA 91745-6813 · (626) 854-7866 · Fax (626) 820-0666
Phone(626) 854-7866
Fax(626) 820-0666
Organization SubpartNo
Authorized OfficialRay HsaioPresident · (626) 854-7866
Enumeration DateOctober 25, 2006
Last NPPES UpdateSeptember 30, 2011
✔ NPI 1710062401 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G70571
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1850 S AZUSA AVE, Hacienda Heights, CA 91745
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Other Identifiers 3

Medicare ID-Type UnspecifiedG70571CA · Medicare
Medicaid00G705711CA
Medicare UPINF11552CA

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)

Ray Hsiao Md Inc 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 Ray Hsiao MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Ray Hsiao, MD
Internal Medicine
NPI 1164507869
1850 S AZUSA AVE SUITE 308
Hacienda Heights, CA 91745
(626) 854-7866
✔ 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 Ray Hsiao MD Inc's NPI number?

The NPI number for Ray Hsiao MD Inc is 1710062401. It was assigned to this organization in the NPPES registry on October 25, 2006.

Where is Ray Hsiao MD Inc located?

Ray Hsiao MD Inc is located at 1850 S Azusa Ave Suite 308, Hacienda Heights, CA 91745. The listed phone number is (626) 854-7866.

What is Ray Hsiao MD Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Ray Hsiao MD Inc enrolled in Medicare?

Yes. Ray Hsiao MD Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Ray Hsiao MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Ray Hsiao MD Inc. 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 Ray Hsiao MD Inc was last updated on September 30, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years 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.