Theresa Tseng, M.D.
Family Medicine Physician · Alhambra, CA
Theresa Tseng, M.D. is a family medicine physician with a practice address in Alhambra, California, and NPI 1558466979, issued on Sep 13, 2006. Check the license (California A383980, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Theresa Tseng
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A383980 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1153 S Garfield Ave, Alhambra, CA 91801
- Phone
- (626) 281-1961
- Enumerated
- Sep 13, 2006
- Record last updated
- Jun 28, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (626) 281-6564
- Medicaid ID
- 00A383980 CA
- Medicare enrollment
- Enrolled (PECOS I20090528000230); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1153 S Garfield Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tam Dinh, NPFamily Nurse Practitioner1417074915
Verify Theresa Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A383980Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average family medicine physician in 2024
1,518 Medicare Part D claims for 154 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium270 claims
- Losartan Potassium186 claims
- Amlodipine Besylate140 claims
- Metformin Hcl87 claims
- Losartan-Hydrochlorothiazide70 claims
- Simvastatin60 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
- Better Care Medical Group, Inc.Alhambra, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Theresa Tseng among 17,133 family medicine physician records in California
Theresa Tseng, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1978 · median 2005 among the 10,652 with a school on file
- Record last updated2011 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
26 family medicine physician records list a practice address in Alhambra
They are 26 of the 1,802 NPPES records with a practice address in Alhambra, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Alhambra → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Thelma Buan, M.D.Alhambra, CA 918011568551547
- Justin Chan, M.D.Alhambra, CA 918011003818501
- Luning Chen, M.D.Alhambra, CA 918011306956529
- Corazon Co Thein, MDAlhambra, CA 918011982783502
- Benson Kwee, D.O.Alhambra, CA 918011861811762
- Michael Lam, M.DAlhambra, CA 918011528184587
- Weiguo Li, M.D.,PH.D.Alhambra, CA 918011972640142
- Hsiung Lin, M.D.Alhambra, CA 918011740380393
Common questions
What is Theresa Tseng, M.D.'s NPI number?
Theresa Tseng, M.D.'s National Provider Identifier (NPI) is 1558466979, issued on Sep 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Theresa Tseng, M.D. located?
The NPPES record lists a practice address at 1153 S Garfield Ave, Alhambra, CA, 91801. Phone: (626) 281-1961. Providers update this record themselves, so call before visiting.
How can I verify Theresa Tseng, M.D.'s license?
NPPES lists California license number A383980, 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 Theresa Tseng, M.D. prescribe under Medicare Part D?
In 2024, Theresa Tseng, M.D. had 1,518 Medicare Part D claims for 154 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.