Irene Y. Tong, M.D.
NPI 1962439299ActiveIndividual· Internal Medicine, Rheumatology· Pasadena, CA
Internal Medicine, Rheumatology (M.D.) in Pasadena, California, trained at University of Southern California Keck School of Medicine (class of 1976). Their prescriptions cost Medicare Part D more than their services did: $1,227,595 for 1,823 claims, against $563,971 paid for services in 2024. Amgen Inc. was the largest of 23 companies reporting payments in 2025, $4,325 in all, mostly food and beverage.
Overview
| NPI | 1962439299 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 26, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | G34761 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Rheumatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 292 |
|---|---|
| Services billed | 49,576 across 31 procedure codes |
| Paid by Medicare | $563,971 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,823 · 3,418 30-day fills |
|---|---|
| Patients | 232 |
| Total drug cost | $1,227,595 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Rheumatology |
Medical group
- American Arthritis and Rheumatology Associates-Ca PCVisalia, CA · 14 clinicians
Industry payments (Open Payments)
- 2025$4,325 · 201 payments from 23 companies
- 2024$2,944 · 108 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $688.02 | 34 |
| Abbvie Inc. | $623.95 | 32 |
| Ucb, Inc. | $382.19 | 16 |
| Pfizer Inc. | $361.74 | 15 |
| Glaxosmithkline, LLC. | $302.47 | 21 |
What the 2025 payments were for
- Food and Beverage$4,235 · 200 payments
- Education$90.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Rheumatology providers in Pasadena
- 1932368396
- 1689710055
- 1831114008
- 1316250525
- 1477514495
- 1770641870
- 1235347188
- 1427255454
All Internal Medicine, Rheumatology providers in California →