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DR. LESLIE AARON TSANG D.O.
NPI 1013045129
Psychiatry & Neurology - Psychiatry in Berkeley, CA

Active since March 01, 2007PECOS Enrolled
900 COLUSA AVE STE 205A, BERKELEY, CA 94707(415) 706-4509(510) 295-2567 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 7, 2023, Feb 4, 2020, Sep 6, 2019 (3 updates tracked since 2019).

About Dr. Leslie Aaron Tsang D.o. NPPES

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

DR. LESLIE AARON TSANG D.O. (NPI 1013045129) is an individual psychiatry provider in Berkeley, California, licensed in California (2OA9411) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1013045129
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. LESLIE AARON TSANGCredential: D.O.
Location Address900 COLUSA AVE STE 205ABerkeley, CA 94707-2319
Mailing Address901 Santa Barbara RdBerkeley, CA 94707-2422 · (510) 725-1006
Phone(415) 706-4509
Fax(510) 295-2567
Sole ProprietorYes
Enumeration DateMarch 1, 2007
Last NPPES UpdateMarch 7, 20233 updates tracked since enumeration
NPPES CertifiedFebruary 4, 2020
✔ NPI 1013045129 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · 2OA9411
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
900 COLUSA AVE STE 205A, Berkeley, CA 94707
Open in Google Maps ↗

Other Identifiers 1

Other20A9411CA · Osteopathic Medical License

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Leslie Aaron Tsang D.o. 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 Leslie Tsang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Psychiatry And Mental Health, A Physician Assistant Corporation
328 mi
Physician Assistant
17074 DEVONSHIRE ST
Northridge, CA 91325
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1538044565 (818) 804-8227

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94707 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Leslie Tsang's NPI number?

The NPI number for Leslie Tsang is 1013045129. It was assigned to this individual provider in the NPPES registry on March 1, 2007.

Where is Leslie Tsang located?

Leslie Tsang practices at 900 Colusa Ave Ste 205A, Berkeley, CA 94707. The listed phone number is (415) 706-4509.

What is Leslie Tsang's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Leslie Tsang enrolled in Medicare?

Yes. Leslie Tsang is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Leslie Tsang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Tsang reassigns Medicare benefits to Psychiatry And Mental Health, A Physician Assistant Corporation (Northridge, 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 Leslie 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 Leslie Tsang was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.