IAN TSANG
NPI 1912472580
Psychologist in San Jose, CA

Active since October 09, 2018PECOS Enrolled
5755 COTTLE RD BLDG 24, SAN JOSE, CA 95123(612) 707-5576 Get Directions Write a Review

NPPES record last updated: December 18, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 18, 2025, Aug 16, 2019, Oct 9, 2018 (3 updates tracked since 2018).

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

NPI1912472580
Entity TypeIndividualMale
Primary Taxonomy103T00000X
Provider Legal NameIAN TSANG
Location Address5755 COTTLE RD BLDG 24San Jose, CA 95123-3600
Mailing Address5755 Cottle Rd Bldg 24San Jose, CA 95123-3600
Sole ProprietorNo
Enumeration DateOctober 9, 2018
Last NPPES UpdateDecember 18, 20253 updates tracked since enumeration
NPPES CertifiedDecember 18, 2025
✔ NPI 1912472580 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in CA · PSY35443
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
5755 COTTLE RD BLDG 24, San Jose, CA 95123

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).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

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.

Internal Medicine
710 LAWRENCE EXPRESSWAY
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.

Psychiatry & Neurology (Psychiatry)
5755 COTTLE RD BLDG 24
SAN JOSE, CA 95123
Marriage & Family Therapist
5755 COTTLE RD BLDG 24
SAN JOSE, CA 95123
Social Worker (Clinical)
5755 COTTLE RD BLDG 24
SAN JOSE, CA 95123
Psychologist (Counseling)
5755 COTTLE RD BLDG 24
SAN JOSE, CA 95123
Psychologist (Counseling)
5755 COTTLE RD BLDG 24
SAN JOSE, CA 95123
Psychiatry & Neurology (Psychiatry)
5755 COTTLE RD BLDG 24
SAN JOSE, CA 95123
Counselor (Mental Health)
5755 COTTLE RD BLDG 24
SAN JOSE, CA 95123
Social Worker (Clinical)
5755 COTTLE RD BLDG 24
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.