Townson Tsai, MD
Infectious Disease Physician · Los Angeles, CA
Townson Tsai, MD is an infectious disease physician with a practice address in Los Angeles, California, and NPI 1316018369, issued on Nov 13, 2006. Check the license (California A66050, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Townson Tsai
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- A66050 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4733 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (323) 783-4011
- Enumerated
- Nov 13, 2006
- Record last updated
- Nov 30, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100726000762); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 4733 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Isaac Abusleme, M.D.Internal Medicine Physician1891109468
- Nancy Adachi, PTPhysical Therapist1902004245
- Sangeeta Aggarwal, MDInternal Medicine Physician1578655908
Verify Townson Tsai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A66050Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average infectious disease physician in 2024
538 Medicare Part D claims for 124 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Testosterone47 claims
- Rosuvastatin Calcium43 claims
- Fluconazole31 claims
- Cephalexin28 claims
- Doxycycline Monohydrate27 claims
- Azithromycin18 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupSan Marcos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Townson Tsai among 1,119 infectious disease physician records in California
Townson Tsai, MD is one of 1,119 infectious disease physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1996 · median 2003 among the 735 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Los Angeles → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Jessica Costales-Cantrell, DOLos Angeles, CA 900271063948537
- Jacob Fleischmann, M.D.Los Angeles, CA 900271376563296
- Marc Lariviere, MDLos Angeles, CA 900271487721403
- Jim Nomura, MDLos Angeles, CA 900271912074808
- Juan Ricaurte, M.D.Los Angeles, CA 900271427046341
- Joel Ruskin, MDLos Angeles, CA 900271982763546
- Tomiko Stein, MD, MPHLos Angeles, CA 900271164416087
- Mona-Gekanju Toeque, M.D.,MPHLos Angeles, CA 900271780068882
Common questions
What is Townson Tsai, MD's NPI number?
Townson Tsai, MD's National Provider Identifier (NPI) is 1316018369, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Townson Tsai, MD located?
The NPPES record lists a practice address at 4733 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (323) 783-4011. Providers update this record themselves, so call before visiting.
How can I verify Townson Tsai, MD's license?
NPPES lists California license number A66050, 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 Townson Tsai, MD prescribe under Medicare Part D?
In 2024, Townson Tsai, MD had 538 Medicare Part D claims for 124 beneficiaries; the average among infectious disease physician prescribers was 689. 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.