Robert Tassan, M.D.
Hematology (Internal Medicine) Physician · Westwood, NJ
Robert Tassan, M.D. is a hematology (internal medicine) physician with a practice address in Westwood, New Jersey, and NPI 1578596508, issued on Jul 10, 2006. Check the license (New Jersey 25MA07452600, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Robert Tassan
- Credential
- M.D.
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- 25MA07452600 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 260 Old Hook RD, Westwood, NJ 07675
- Phone
- (201) 383-4840
- Enumerated
- Jul 10, 2006
- Record last updated
- Jan 26, 2022
- Fax
- (201) 383-4824
- Medicare enrollment
- Enrolled (PECOS I20050907000639); accepts Medicare assignment
- Medical or professional school
- Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc), 1999
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 37 in New Jersey → Look up another NPI →
Also registered at 260 Old Hook RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lyndsay Buehler, APNFamily Nurse Practitioner1245782713
- Michael Polizzano, DPTPhysical Therapist1174398226
- Joyce Tsai, M.D.Neurology Physician1447513213
Verify Robert Tassan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA07452600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% more Medicare Part D claims than the average hematology (internal medicine) physician in 2024
905 Medicare Part D claims for 182 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D. 64 claims were for opioids.
Most prescribed
- Eliquis178 claims
- Hydroxyurea123 claims
- Imbruvica57 claims
- Xarelto54 claims
- Deferasirox37 claims
- Anastrozole27 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 93.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,041.95
173 payments; by number, the most common kind was food and beverage; the largest payer was Rigel Pharmaceuticals, Inc. The 721 providers of this specialty with any payment received $13,778.35 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regional Cancer Care Associates LLCWestwood, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Tassan among 37 hematology (internal medicine) physician records in New Jersey
Robert Tassan, M.D. is one of 37 hematology (internal medicine) physician records with a practice address in New Jersey. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 62% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1999 · median 2008 among the 25 with a school on file
- Record last updated2022 · 19% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Internal Medicine) Physician providers in New Jersey
There are 37 hematology (internal medicine) physician records in New Jersey.
All 37 in New Jersey → Every provider in Westwood → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Eugene Smith, M.D.Westwood, NJ 076751326286758
- Karleung Siu, M.D.Teaneck, NJ 076661649417437
- Anupama Doraiswamy, MDMontvale, NJ 076451649499336
- Katherine Linder, MDHackensack, NJ 076011417358367
- Pooja Phull, MDHackensack, NJ 076011104245315
- Hussam EltoukhyWest Long Branch, NJ 077641356737324
- Patrick Lee, MDWest Long Branch, NJ 077641356442602
- Casey FordPaterson, NJ 075031215881339
Common questions
What is Robert Tassan, M.D.'s NPI number?
Robert Tassan, M.D.'s National Provider Identifier (NPI) is 1578596508, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Tassan, M.D. located?
The NPPES record lists a practice address at 260 Old Hook RD, Westwood, NJ, 07675. Phone: (201) 383-4840. Providers update this record themselves, so call before visiting.
How can I verify Robert Tassan, M.D.'s license?
NPPES lists New Jersey license number 25MA07452600, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Tassan, M.D. prescribe under Medicare Part D?
In 2024, Robert Tassan, M.D. had 905 Medicare Part D claims for 182 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. Part D covers Medicare prescriptions only.
What is Robert Tassan, M.D.'s MIPS final score?
The 2023 MIPS final score is 93.2 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.