Timothy Yen, M.D.
Gastroenterology Physician · Loma Linda, CA
Timothy Yen, M.D. is a gastroenterology physician with a practice address in Loma Linda, California, and NPI 1871988907, issued on Apr 6, 2015. Check the license (California 143681, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Timothy Yen
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 143681 CA
A143681 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11234 Anderson St # MC-1516, Loma Linda, CA 92354
- Phone
- (909) 558-4905
- Enumerated
- Apr 6, 2015
- Record last updated
- Aug 26, 2022
- Medicare enrollment
- Enrolled (PECOS I20180515002065); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 2015
- 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 11234 Anderson St # MC-1516
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abdalhamid Al Harash, M.D., FACPRheumatology Physician1962790618
- Jonathan Arcobello, M.D.Infectious Disease Physician1396131983
- Josianne Bailey, MD, MBAInternal Medicine Physician1033772546
- Yuan Cao, M.D.Hospitalist Physician1467815308
- Maham Farshidpour, MDGastroenterology Physician1891105565
- Lakshmi GanesanNephrology Physician1821356288
Verify Timothy Yen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 143681Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% fewer Medicare Part D claims than the average gastroenterology physician in 2024
540 Medicare Part D claims for 176 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Omeprazole74 claims
- Famotidine69 claims
- Linzess63 claims
- Pantoprazole Sodium51 claims
- Gavilyte-G49 claims
- Amitriptyline Hcl22 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $161.41
1 payment: food and beverage; the largest payer was Boston Scientific Corporation. 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
- Faculty Physicians And Surgeons OF LlusmLoma Linda, CA
- Sac Health SystemSan Bernardino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Yen among 2,140 gastroenterology physician records in California
Timothy Yen, 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 2015, is newer than 85% of them.
- NPI issued2015 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2015 · 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 Loma Linda → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Andrew Chang, M.D.Loma Linda, CA 923541396702874
- Kendrick Che, DOLoma Linda, CA 923541326251844
- David Condon, M.D.Loma Linda, CA 923541790898799
- Mahnaz Farahmand, M.D.Loma Linda, CA 923541063454841
- Christian Jackson, M.D.Loma Linda, CA 923541639264864
- Kenneth Kelln, M.D.Loma Linda, CA 923541487767398
- Terence Lewis, M.D.Loma Linda, CA 923541295756088
- Michel Mendler, M.D.Loma Linda, CA 923541134232051
Common questions
What is Timothy Yen, M.D.'s NPI number?
Timothy Yen, M.D.'s National Provider Identifier (NPI) is 1871988907, issued on Apr 6, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Yen, M.D. located?
The NPPES record lists a practice address at 11234 Anderson St # MC-1516, Loma Linda, CA, 92354. Phone: (909) 558-4905. Providers update this record themselves, so call before visiting.
How can I verify Timothy Yen, M.D.'s license?
NPPES lists California license number 143681, 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 Yen, M.D. prescribe under Medicare Part D?
In 2024, Timothy Yen, M.D. had 540 Medicare Part D claims for 176 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Timothy Yen, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.