Thomas Mu-Ren Tseng, DO
NPI 1912017211ActiveIndividual· Internal Medicine· Monterey Park, CA
Internal Medicine (DO) in Monterey Park, California, licensed in CA, with an NPI issued in August 2006. Their prescriptions cost Medicare Part D more than their services did: $1,699,034 for 21,214 claims, against $821,435 paid for services in 2024. Amgen Inc. was the largest of 15 companies reporting payments in 2025, $885.48 in all, mostly food and beverage.
Overview
| NPI | 1912017211 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Aug 30, 2006 |
| Last updated in NPPES | Sep 17, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20A6968 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 494 |
|---|---|
| Services billed | 16,586 across 26 procedure codes |
| Paid by Medicare | $821,435 |
Part D prescriptions in 2024
| Prescriptions (claims) | 21,214 · 39,467 30-day fills |
|---|---|
| Patients | 1,049 |
| Total drug cost | $1,699,034 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Family Practice |
| Telehealth | Offers telehealth |
Other facilities
- Care Best Home Health IncHome health agency · Alhambra, CA
- Happy Home Health ServicesHome health agency · Arcadia, CA
- The Best Care Ever Home Health, IncHome health agency · Van Nuys, CA
Industry payments (Open Payments)
- 2025$885.48 · 38 payments from 15 companies
- 2024$1,658 · 64 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $141.85 | 8 |
| Lilly USA, LLC | $118.53 | 4 |
| Radius Health, Inc. | $78.43 | 3 |
| Novartis Pharmaceuticals Corporation | $73.45 | 3 |
| Astrazeneca Pharmaceuticals LP | $72.46 | 3 |
What the 2025 payments were for
- Food and Beverage$885.48 · 38 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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