Robert Morton Marcus, MD
Rheumatology Physician · Massapequa, NY
Robert Morton Marcus, MD is a rheumatology physician with a practice address in Massapequa, New York, and NPI 1619958931, issued on Nov 14, 2005. Check the license (New York 106233, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Robert Morton Marcus
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 106233 NY
Self-reported in NPPES; status is on the state search - Practice location
- 585 Broadway, Massapequa, NY 11758
- Phone
- (516) 797-1234
- Enumerated
- Nov 14, 2005
- Record last updated
- Sep 26, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (516) 797-1932
- Medicaid ID
- 00409201 NY
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 599 in New York → Look up another NPI →
Also registered at 585 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Morton Marcus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 106233Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average rheumatology physician in 2024
40 Medicare Part D claims, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Diazepam13 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.
Robert Morton Marcus among 599 rheumatology physician records in New York
Robert Morton Marcus, MD is one of 599 rheumatology physician records with a practice address in New York. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 88% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2007 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in New York
There are 599 rheumatology physician records in New York.
All 599 in New York → Every provider in Massapequa → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Sheldon Blau, MDMassapequa, NY 117581376607267
- Louis Tiger, MDMassapequa, NY 117581902960891
- Akbar Khan, M.D.Lindenhurst, NY 117571831155639
- Gary Meredith, M.D.Jericho, NY 117531659383503
- Harley Cohen, MDNesconset, NY 117671669535845
- Ranjan Roy, M.D.Northport, NY 117681174615140
- Monica WeinbergNorthport, NY 117681265896104
- Max Hamburger, M.D.Melville, NY 117471023004876
Common questions
What is Robert Morton Marcus, MD's NPI number?
Robert Morton Marcus, MD's National Provider Identifier (NPI) is 1619958931, issued on Nov 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert Morton Marcus, MD located?
The NPPES record lists a practice address at 585 Broadway, Massapequa, NY, 11758. Phone: (516) 797-1234. Providers update this record themselves, so call before visiting.
How can I verify Robert Morton Marcus, MD's license?
NPPES lists New York license number 106233, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Morton Marcus, MD prescribe under Medicare Part D?
In 2024, Robert Morton Marcus, MD had 40 Medicare Part D claims; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
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.