Tsuh-Yin Chen, MD
Internal Medicine Physician · San Diego, CA
Tsuh-Yin Chen, MD is an internal medicine physician with a practice address in San Diego, California, and NPI 1093803520, issued on Oct 10, 2006. Check the license (California C55563, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tsuh-Yin Chen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C55563 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3544 30TH St, San Diego, CA 92104
- Phone
- (619) 515-2300
- Enumerated
- Oct 10, 2006
- Record last updated
- Oct 20, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (619) 906-4564
- Medicare enrollment
- Enrolled (PECOS I20060316000034); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Stony Brook, School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 3544 30TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Denisse Abdo, RDHealth Educator1164734513
- Shawn Baisley, PA-CPhysician Assistant1376936120
- Martha Benitez, DOInternal Medicine Physician1124521901
- Teah Caine Flores, M.D.Family Medicine Physician1972966679
- Nora CardonaClinical Social Worker1295655389
- Kevin Cradic, RACAddiction (Substance Use Disorder) Counselor1114645017
Verify Tsuh-Yin Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C55563Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,009 Medicare Part D claims for 108 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Atorvastatin Calcium98 claims
- Metformin Hcl92 claims
- Lisinopril56 claims
- Amlodipine Besylate45 claims
- Ozempic37 claims
- Losartan Potassium35 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: $605.52
7 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. 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.
Bills Medicare through one group practice
- Centro DE Salud DE LA Comunidad DE San Ysidro, Inc.Chula Vista, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tsuh-Yin Chen among 17,696 internal medicine physician records in California
Tsuh-Yin Chen, MD 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
- Graduated2002 · median 2004 among the 11,065 with a school on file
- Record last updated2016 · 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).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Martha Benitez, DOSan Diego, CA 921041124521901
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- Miles Stanich Md Inc, MDSan Diego, CA 921041700907771
- Arthur Wong, MDSan Diego, CA 921041023639176
- Jane BoydSan Diego, CA 921051861473191
- Lana Bridi, MDSan Diego, CA 921031033910971
- Joseph Delly, MDSan Diego, CA 921031992565576
- Sevag Hamamah, DOSan Diego, CA 921031972342061
Common questions
What is Tsuh-Yin Chen, MD's NPI number?
Tsuh-Yin Chen, MD's National Provider Identifier (NPI) is 1093803520, issued on Oct 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tsuh-Yin Chen, MD located?
The NPPES record lists a practice address at 3544 30TH St, San Diego, CA, 92104. Phone: (619) 515-2300. Providers update this record themselves, so call before visiting.
How can I verify Tsuh-Yin Chen, MD's license?
NPPES lists California license number C55563, 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 Tsuh-Yin Chen, MD prescribe under Medicare Part D?
In 2024, Tsuh-Yin Chen, MD had 1,009 Medicare Part D claims for 108 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.