Dr. Ioannis Tassiulas, M.D.
Rheumatology (Rheumatology Physician)
- Medicare participating
At a glance
- In the NPI registry since
- 2011
- Medicare patients seen, 2024
- 189
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2011Registered with an NPI (national billing number; not a license date)
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Rheumatology Physician primary
NY license 233519
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare patients and services
- Medicare patients, 2024
- 189
- Services billed
- 349
- Patients’ average age
- 72
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 30-39 minutes | 268 | 131 |
| New patient office or other outpatient visit, 60-74 minutes | 37 | 37 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Leflunomide Other prescribers in New York, NY | 316 |
| Methotrexate (methotrexate sodium) Other prescribers in New York, NY | 299 |
| Allopurinol Other prescribers in New York, NY | 203 |
| Gabapentin Other prescribers in New York, NY | 198 |
| Prednisone Other prescribers in New York, NY | 195 |
| Hydroxychloroquine Sulfate Other prescribers in New York, NY | 148 |
| Humira(Cf) Pen (adalimumab) Other prescribers in New York, NY | 127 |
| Duloxetine Hcl Other prescribers in New York, NY | 112 |
| Folic Acid Other prescribers in New York, NY | 110 |
| Sulfasalazine Other prescribers in New York, NY | 100 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 3 companies reported 3 payments worth $75.39 in total to this clinician.
| Fresenius Kabi USA, LLC | $30.29 |
|---|---|
| GlaxoSmithKline, LLC. | $24.10 |
| Aurinia Pharma U.S., Inc. | $21.00 |
| Food and Beverage | $75.39 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.