IAN TSANG
NPI 1912472580
Psychologist in San Jose, CA
About Ian Tsang NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IAN TSANG (NPI 1912472580) is an individual psychologist in San Jose, California, licensed in California (PSY35443) and active in the NPI registry since October 2018. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ian Tsang is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ian Tsang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Santa Clara, CA 95051
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 13
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN JOSE, CA 95123
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 Ian Tsang's NPI number?
The NPI number for Ian Tsang is 1912472580. It was assigned to this individual provider in the NPPES registry on October 9, 2018.
Where is Ian Tsang located?
Ian Tsang practices at 5755 Cottle Rd Bldg 24, San Jose, CA 95123. The listed phone number is (612) 707-5576.
What is Ian Tsang's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Ian Tsang enrolled in Medicare?
Yes. Ian Tsang is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ian Tsang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ian Tsang reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, CA). The 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 Ian Tsang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Ian Tsang was last updated on December 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.