Tim Ken Shen, M.D.
NPI 1134514995ActiveIndividual· Internal Medicine· Fontana, CA
Internal Medicine (M.D.) with Southern California Permanente Medical Group, practicing in Fontana, California. Their prescriptions cost Medicare Part D more than their services did: $375,104 for 934 claims, against $5,263 paid for services in 2024. Bayer Healthcare Pharmaceuticals Inc. reported $200.00 in payments in 2025, mostly consulting fees. Lists Kaiser Foundation Hospital Fontana/Ontario as a hospital affiliation.
Overview
| NPI | 1134514995 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 30, 2015 |
| Last updated in NPPES | Nov 29, 2021 |
| Certified by provider | Sep 20, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A143876 | CA |
| Internal Medicine, Pulmonary Disease | 207RP1001X | A143876 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 19 |
|---|---|
| Services billed | 41 across 7 procedure codes |
| Paid by Medicare | $5,263 |
Part D prescriptions in 2024
| Prescriptions (claims) | 934 · 1,690 30-day fills |
|---|---|
| Patients | 184 |
| Total drug cost | $375,104 |
| Generic share | 42% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Hospital affiliation
- Kaiser Foundation Hospital Fontana/OntarioFontana, CA
Industry payments (Open Payments)
- 2025$200.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $200.00 | 1 |
What the 2025 payments were for
- Consulting Fee$200.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 118 internal medicine physicians in Fontana · All internal medicine physicians in California