Thomas Mu-Ren Tseng, DO
Internal Medicine Physician · Monterey Park, CA
Thomas Mu-Ren Tseng, DO is an internal medicine physician with a practice address in Monterey Park, California, and NPI 1912017211, issued on Aug 30, 2006. Check the license (California 20A6968, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Mu-Ren Tseng
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A6968 CA
Self-reported in NPPES; status is on the state search - Practice location
- 880 S Atlantic Blvd, Monterey Park, CA 91754
- Phone
- (626) 289-9478
- Enumerated
- Aug 30, 2006
- Record last updated
- Sep 17, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (626) 289-9718
- Medicare enrollment
- Enrolled (PECOS I20081229000259); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 880 S Atlantic Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lukchai Bhavabhutanon, D.O.Internal Medicine Physician1922032952
- Ronald Bishop, M.D.Pain Medicine (Anesthesiology) Physician1821053158
- Vinod Ghai, M.D.Pulmonary Disease Physician1104899368
- Harel Ho, M.D.Family Medicine Physician1578501714
- Dae Lee, M.D.Anesthesiology Physician1326118977
- Rachel Ma, D.D.S.Dentist1134662182
Verify Thomas Mu-Ren Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6968Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6.7 times the Medicare Part D claims of the average internal medicine physician in 2024
21,214 Medicare Part D claims for 1,049 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,736 claims
- Amlodipine Besylate1,274 claims
- Pantoprazole Sodium744 claims
- Metoprolol Succinate721 claims
- Metformin Hcl715 claims
- Rosuvastatin Calcium594 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.
Industry payments in 2024: $1,658.14
62 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Thomas Mu-Ren Tseng among 17,696 internal medicine physician records in California
Thomas Mu-Ren Tseng, DO is one of 17,696 internal medicine 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1995 · median 2004 among the 11,065 with a school on file
- Record last updated2010 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 internal medicine physician records list a practice address in Monterey Park
They are 33 of the 948 NPPES records with a practice address in Monterey Park, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Monterey Park → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lukchai Bhavabhutanon, D.O.Monterey Park, CA 917541922032952
- Edward Chang, MDMonterey Park, CA 917541780637199
- Charles Hung, M.D.Monterey Park, CA 917541518974161
- Chi Lam, MDMonterey Park, CA 917541205843778
- Pen Hong Lee, MDMonterey Park, CA 917541992807267
- Xiang-Hong Lin, MDMonterey Park, CA 917541578520771
- Li Liu, M.D.Monterey Park, CA 917541295722627
- Henry Luh, MDMonterey Park, CA 917541417961889
Common questions
What is Thomas Mu-Ren Tseng, DO's NPI number?
Thomas Mu-Ren Tseng, DO's National Provider Identifier (NPI) is 1912017211, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Mu-Ren Tseng, DO located?
The NPPES record lists a practice address at 880 S Atlantic Blvd, Monterey Park, CA, 91754. Phone: (626) 289-9478. Providers update this record themselves, so call before visiting.
How can I verify Thomas Mu-Ren Tseng, DO's license?
NPPES lists California license number 20A6968, 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 Thomas Mu-Ren Tseng, DO prescribe under Medicare Part D?
In 2024, Thomas Mu-Ren Tseng, DO had 21,214 Medicare Part D claims for 1,049 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.