Irene Tong, M.D.
NPI 1962439299 · Rheumatology Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irene Tong, M.D. is a Rheumatology Physician provider in Pasadena, CA (NPI 1962439299).
Provider details
- NPI number
- 1962439299
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- G34761 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,283 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 764 | $138 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 128 | $16 |
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 114 | $82 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 88 | $194 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 71 | $149 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 51 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxychloroquine Sulfate | 234 | 69 |
| Methotrexate Sodiumbrand: Methotrexate | 181 | 52 |
| Prednisone | 135 | 34 |
| Celecoxib | 131 | 41 |
| Gabapentin | 78 | 25 |
| Diclofenac Sodium | 65 | 16 |
| Meloxicam | 49 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,944 across 107 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Irene Tong's NPI number?
- Irene Tong's National Provider Identifier (NPI) is 1962439299, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irene Tong's specialty?
- Irene Tong is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Irene Tong located?
- Irene Tong's practice location on file with NPPES is 2750 E Washington Blvd, Pasadena, CA 91107-1448.
- What is Irene Tong's phone number?
- The practice phone number listed in the NPPES registry for Irene Tong is (626) 296-2910.
- Does Irene Tong accept Medicare?
- Irene Tong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irene Tong's NPI active?
- Yes — Irene Tong's NPI (1962439299) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.