Warren Tseng, MD
Surgery Physician · San Diego, CA
Warren Tseng, MD is a surgery physician with a practice address in San Diego, California, and NPI 1851558514, issued on May 20, 2008. Check the license (California A103915, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Warren Tseng
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- A103915 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5893 Copley Dr FL 4, San Diego, CA 92111
- Phone
- (858) 616-5335
- Enumerated
- May 20, 2008
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (619) 516-7179
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 5893 Copley Dr FL 4
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul GrandStudent in an Organized Health Care Education/Training Program1578225959
Verify Warren Tseng in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A103915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% more Medicare Part D claims than the average surgery physician in 2024
191 Medicare Part D claims for 63 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 54 claims were for opioids.
Most prescribed
- Oxycodone Hcl50 claims
- Ibuprofen32 claims
- Pantoprazole Sodium31 claims
- Ondansetron Odt23 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: $101.72
1 payment: food and beverage; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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.
Warren Tseng among 3,118 surgery physician records in California
Warren Tseng, MD is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 58% of them.
- NPI issued2008 · 58% of these records are older, 37% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- 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 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in San Diego → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Ro Park, MDSan Diego, CA 921111699799593
- Scott Wenger, D.O.San Diego, CA 921111780659276
- Justin Wu, MDSan Diego, CA 921111811064769
- Yin-Vui Yong, M.D.San Diego, CA 921101437121696
- Edward Busch, M.D.San Diego, CA 921081720001241
- Julie Ellner, M.D.San Diego, CA 921081104876762
- Rodd Benfield, MDSan Diego, CA 921071033181326
- Jeffrey Mazin, M.D.,F.A.C.S.,INC.San Diego, CA 921171316044373
Common questions
What is Warren Tseng, MD's NPI number?
Warren Tseng, MD's National Provider Identifier (NPI) is 1851558514, issued on May 20, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Warren Tseng, MD located?
The NPPES record lists a practice address at 5893 Copley Dr FL 4, San Diego, CA, 92111. Phone: (858) 616-5335. Providers update this record themselves, so call before visiting.
How can I verify Warren Tseng, MD's license?
NPPES lists California license number A103915, 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 Warren Tseng, MD prescribe under Medicare Part D?
In 2024, Warren Tseng, MD had 191 Medicare Part D claims for 63 beneficiaries; the average among surgery physician prescribers was 147. 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.