Timothy Chen, M.D.
Gastroenterology Physician · San Francisco, CA
Timothy Chen, M.D. is a gastroenterology physician with a practice address in San Francisco, California, and NPI 1699017707, issued on Mar 27, 2013. Check the license (California A136216, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy Chen
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A136216 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2100 Webster St Ste 115, San Francisco, CA 94115
- Phone
- (415) 387-8800
- Enumerated
- Mar 27, 2013
- Record last updated
- Feb 14, 2022
- Fax
- (415) 387-5204
- Medicare enrollment
- Enrolled (PECOS I20151208002868); accepts Medicare assignment
- Medical or professional school
- University Of Tennessee, Hsc, College Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 2100 Webster St Ste 115
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jesse Liu, MDGastroenterology Physician1043348618
- Aristotle Mendiola, M.D.Gastroenterology Physician1871518266
- Nelli Perkins, M.D.Neurology Physician1740592112
- Arshia SadreddinNeurology Physician1033308903
- Michael Verhille, M.D.Gastroenterology Physician1851324537
- John WangGastroenterology Physician1518429869
Verify Timothy Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A136216Check 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% more Medicare Part D claims than the average gastroenterology physician in 2024
993 Medicare Part D claims for 521 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Pantoprazole Sodium279 claims
- Gavilyte-C174 claims
- Sod Sulf-Potass Sulf-Mag Sulf121 claims
- Famotidine67 claims
- Omeprazole37 claims
- Metronidazole24 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: $1,869.65
73 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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 2 group practices
- North East Medical ServicesSan Francisco, CA
- Sutter Bay Medical FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Chen among 2,140 gastroenterology physician records in California
Timothy Chen, M.D. is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 80% of them.
- NPI issued2013 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2013 · median 2002 among the 1,538 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in San Francisco → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Douglas Corley, MDSan Francisco, CA 941151598843138
- Edward Doo, MDSan Francisco, CA 941151295837243
- Yao Heng, MDSan Francisco, CA 941151225116825
- Steven Jacobsohn, M.D.San Francisco, CA 941151639104151
- Wolfgang Korn, MDSan Francisco, CA 941151235187055
- Uma Mahadevan, MDSan Francisco, CA 941151851355283
- Jane Melnick, MDSan Francisco, CA 941151124049879
- Aristotle Mendiola, M.D.San Francisco, CA 941151871518266
Common questions
What is Timothy Chen, M.D.'s NPI number?
Timothy Chen, M.D.'s National Provider Identifier (NPI) is 1699017707, issued on Mar 27, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Chen, M.D. located?
The NPPES record lists a practice address at 2100 Webster St Ste 115, San Francisco, CA, 94115. Phone: (415) 387-8800. Providers update this record themselves, so call before visiting.
How can I verify Timothy Chen, M.D.'s license?
NPPES lists California license number A136216, 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 Timothy Chen, M.D. prescribe under Medicare Part D?
In 2024, Timothy Chen, M.D. had 993 Medicare Part D claims for 521 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.