Robert Tassan, M.D.
NPI 1578596508 · Hematology (Internal Medicine) Physician · Westwood, NJ
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Tassan, M.D. is a Hematology (Internal Medicine) Physician provider in Westwood, NJ (NPI 1578596508).
Provider details
- NPI number
- 1578596508
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA07452600 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
4,970 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 | 1,862 | $140 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,125 | $8 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 773 | $18 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 269 | $16 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 232 | $126 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 178 | 52 |
| Hydroxyurea | 123 | 40 |
| Ibrutinibbrand: Imbruvica | 57 | — |
| Rivaroxabanbrand: Xarelto | 54 | 13 |
| Deferasirox | 37 | — |
| Anastrozole | 27 | — |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$3,042 across 173 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
Additional practice locations (2)
- 795 Franklin AveFranklin Lakes, NJ 07417-1368Phone: (201) 848-8791Fax: (201) 848-9604
- 92 2nd StHackensack, NJ 07601-2191Phone: (551) 996-4202Fax: (551) 996-0598
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2022-01-26
- Certified
- 2022-01-26
Frequently asked questions
- What is Robert Tassan's NPI number?
- Robert Tassan's National Provider Identifier (NPI) is 1578596508, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Tassan's specialty?
- Robert Tassan is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Tassan located?
- Robert Tassan's practice location on file with NPPES is 260 Old Hook Rd, Westwood, NJ 07675-3123.
- What is Robert Tassan's phone number?
- The practice phone number listed in the NPPES registry for Robert Tassan is (201) 383-4840.
- Does Robert Tassan accept Medicare?
- Robert Tassan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Tassan's NPI active?
- Yes — Robert Tassan's NPI (1578596508) is active in the NPPES registry as of the last update on 2022-01-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.