Leslie Aaron Tsang, D.O.
Psychiatry Physician · Berkeley, CA
Leslie Aaron Tsang, D.O. is a psychiatry physician with a practice address in Berkeley, California, and NPI 1013045129, issued on Mar 1, 2007. Check the license (California 2OA9411, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Leslie Aaron Tsang
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 2OA9411 CA
Self-reported in NPPES; status is on the state search - Practice location
- 900 Colusa Ave Ste 205A, Berkeley, CA 94707
- Phone
- (415) 706-4509
- Enumerated
- Mar 1, 2007
- Record last updated
- Mar 7, 2023
- Fax
- (510) 295-2567
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Leslie Aaron Tsang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 2OA9411Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average psychiatry physician in 2024
36 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Clonazepam12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Leslie Aaron Tsang among 8,673 psychiatry physician records in California
Leslie Aaron Tsang, D.O. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
106 psychiatry physician records list a practice address in Berkeley
They are 106 of the 4,898 NPPES records with a practice address in Berkeley, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Berkeley → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Martin Epson, MDBerkeley, CA 947071801098967
- Maryam Eskandari, M.D.Berkeley, CA 947071326279316
- Johanna Ferman, M.D.Kensington, CA 947071669660080
- Stuart Gold, MDBerkeley, CA 947071952477135
- Tora Hanssen, M.D.Berkeley, CA 947071508171992
- Karl Jeffries, MDAlbany, CA 947071922282938
- Neil Kostick, M.D.Albany, CA 947071730348657
- Nicholas Rosenlicht, M.D.Berkeley, CA 947071265541122
Common questions
What is Leslie Aaron Tsang, D.O.'s NPI number?
Leslie Aaron Tsang, D.O.'s National Provider Identifier (NPI) is 1013045129, issued on Mar 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Leslie Aaron Tsang, D.O. located?
The NPPES record lists a practice address at 900 Colusa Ave Ste 205A, Berkeley, CA, 94707. Phone: (415) 706-4509. Providers update this record themselves, so call before visiting.
How can I verify Leslie Aaron Tsang, D.O.'s license?
NPPES lists California license number 2OA9411, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leslie Aaron Tsang, D.O. prescribe under Medicare Part D?
In 2024, Leslie Aaron Tsang, D.O. had 36 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.