Ioannis Tassiulas, M.D.
NPI 1215227988 · Rheumatology Physician · New York, NY
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ioannis Tassiulas, M.D. is a Rheumatology Physician provider in New York, NY (NPI 1215227988).
Provider details
- NPI number
- 1215227988
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 233519 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
328 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 278 | $105 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 50 | $193 |
Typical Medicare-allowed amounts for these services range $105–$193 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 44 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Leflunomide | 316 | 59 |
| Methotrexate Sodiumbrand: Methotrexate | 299 | 54 |
| Allopurinol | 203 | 48 |
| Gabapentin | 198 | 53 |
| Prednisone | 195 | 55 |
| Hydroxychloroquine Sulfate | 148 | 28 |
| Adalimumabbrand: Humira(cf) Pen | 127 |
Practice location
Mailing address
Additional practice locations (2)
- 19 Bradhurst AveSuite 3090Hawthorne, NY 10532-0000Phone: (914) 372-7887Fax: (914) 372-7884
- 19 Bradhurst AveSuite 3090Hawthorne, NY 10532-0000Phone: (914) 372-7887Fax: (914) 372-7884
Registry dates
- Enumerated
- 2011-04-14
- Last updated
- 2019-02-22
Frequently asked questions
- What is Ioannis Tassiulas's NPI number?
- Ioannis Tassiulas's National Provider Identifier (NPI) is 1215227988, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ioannis Tassiulas's specialty?
- Ioannis Tassiulas is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Ioannis Tassiulas located?
- Ioannis Tassiulas's practice location on file with NPPES is 5 E 98th St, New York, NY 10029.
- What is Ioannis Tassiulas's phone number?
- The practice phone number listed in the NPPES registry for Ioannis Tassiulas is (212) 241-1671.
- Does Ioannis Tassiulas accept Medicare?
- Ioannis Tassiulas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ioannis Tassiulas's NPI active?
- Yes — Ioannis Tassiulas's NPI (1215227988) is active in the NPPES registry as of the last update on 2019-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.