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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

CHRISTOPHER K TSAI M D INC.
NPI 1760675763
Urology in Upland, CA

Active since August 22, 2007
1175 E ARROW HWY, SUITE E, UPLAND, CA 91786(909) 985-9737(909) 981-1203 Get Directions Write a Review

NPPES record last updated: September 1, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Christopher K Tsai M D Inc. NPPES

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

CHRISTOPHER K TSAI M D INC. (NPI 1760675763) is a healthcare organization registered as an urology in Upland, California and active in the NPI registry since August 2007. The organization lists John U Alvarez, Billing Manager, as its authorized official.

NPPES Registry Identity

NPI1760675763
Entity TypeOrganization
Primary Taxonomy208800000X
Legal Business NameCHRISTOPHER K TSAI M D INC.
Location Address1175 E ARROW HWY, SUITE EUpland, CA 91786-5525
Mailing Address1175 E Arrow Hwy, Suite EUpland, CA 91786-5525 · (909) 985-9737 · Fax (909) 981-1203
Phone(909) 985-9737
Fax(909) 981-1203
Organization SubpartNo
Authorized OfficialJohn U AlvarezBilling Manager · (909) 985-9737
Enumeration DateAugust 22, 2007
Last NPPES UpdateSeptember 1, 2026
NPPES CertifiedSeptember 1, 2026
✔ NPI 1760675763 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyUrologyAllopathic & Osteopathic Physicians
Taxonomy Code208800000X
License✔ Licensed in CA · A54843
Definition
A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures.
1175 E ARROW HWY, Upland, CA 91786
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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)

Christopher K Tsai M D Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Christopher K Tsai M D Inc., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Christopher Tsai, MD
Urology
NPI 1457344483
1175 E ARROW HWY SUITE E
Upland, CA 91786
(909) 985-9737
✔ PECOS✔ Accepts MedicareSame address
Victor Ching, MD
Urology
NPI 1356334437
1113 ALTA AVE STE E
Upland, CA 91786
(909) 985-9737
✔ PECOS0.6 mi

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 Christopher K Tsai M D Inc.'s NPI number?

The NPI number for Christopher K Tsai M D Inc. is 1760675763. It was assigned to this organization in the NPPES registry on August 22, 2007.

Where is Christopher K Tsai M D Inc. located?

Christopher K Tsai M D Inc. is located at 1175 E Arrow Hwy Suite E, Upland, CA 91786. The listed phone number is (909) 985-9737.

What is Christopher K Tsai M D Inc.'s specialty?

The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.

Is Christopher K Tsai M D Inc. enrolled in Medicare?

Yes. Christopher K Tsai M D Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Christopher K Tsai M D Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Urology, reassign their Medicare billing to Christopher K Tsai M D 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. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Christopher K Tsai M D Inc. was last updated on September 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 50 days 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.