Timothy Yen, M.D.
NPI 1871988907ActiveIndividual· Internal Medicine, Gastroenterology· Loma Linda, CA
Internal Medicine, Gastroenterology (M.D.) in Loma Linda, California, trained at New York University School of Medicine (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $175,694 for 540 claims, against $49,203 paid for services in 2024. Takeda Pharmaceuticals U.S.A., Inc. reported $25.71 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1871988907 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 6, 2015 |
| Last updated in NPPES | Aug 26, 2022 |
| Certified by provider | Aug 26, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 143681 | CA |
| Internal Medicine | 207R00000X | A143681 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 281 |
|---|---|
| Services billed | 488 across 37 procedure codes |
| Paid by Medicare | $49,203 |
Part D prescriptions in 2024
| Prescriptions (claims) | 540 · 778 30-day fills |
|---|---|
| Patients | 176 |
| Total drug cost | $175,694 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | New York University School of Medicine |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical groups
- Faculty Physicians and Surgeons of LlusmLoma Linda, CA · 1,315 clinicians
- Sac Health SystemSan Bernardino, CA · 227 clinicians
Hospital affiliations
- Loma Linda University Medical CenterLoma Linda, CA
- Riverside University Health System-Medical CenterMoreno Valley, CA
Industry payments (Open Payments)
- 2025$25.71 · 1 payment from 1 company
- 2024$161.41 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $25.71 | 1 |
What the 2025 payments were for
- Food and Beverage$25.71 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 33 gastroenterologists in Loma Linda · All gastroenterologists in California