Peter Xuepeng Tan, M.D.
NPI 1144228909ActiveIndividual· Internal Medicine· Arcadia, CA
Internal Medicine (M.D.) with Peter Yang Ma Medical Inc, practicing in Arcadia, California. Their prescriptions cost Medicare Part D more than their services did: $639,997 for 8,520 claims, against $148,237 paid for services in 2024. Pfizer Inc. was the largest of 9 companies reporting payments in 2025, $441.64 in all, mostly food and beverage.
Overview
| NPI | 1144228909 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 14, 2005 |
| Last updated in NPPES | Mar 22, 2026 |
| Certified by provider | Mar 22, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A69134 | 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 | 336 |
|---|---|
| Services billed | 1,842 across 28 procedure codes |
| Paid by Medicare | $148,237 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,520 · 13,403 30-day fills |
|---|---|
| Patients | 747 |
| Total drug cost | $639,997 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Peter Yang Ma Medical IncArcadia, CA · 2 clinicians
Other facilities
- Bright Care Home Health, IncHome health agency · Rosemead, CA
- Diamond Home Health Services, IncHome health agency · Diamond Bar, CA
Industry payments (Open Payments)
- 2025$441.64 · 19 payments from 9 companies
- 2024$554.22 · 26 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $96.27 | 4 |
| Bayer Healthcare Pharmaceuticals Inc. | $69.73 | 3 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $64.40 | 3 |
| Astrazeneca Pharmaceuticals LP | $49.06 | 2 |
| Glaxosmithkline, LLC. | $46.18 | 2 |
What the 2025 payments were for
- Food and Beverage$441.64 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 100 internal medicine physicians in Arcadia · All internal medicine physicians in California