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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

RONALD A. PRIMIS M.D.
NPI 1730188343
Internal Medicine - Hematology & Oncology in Rockville Centre, NY

Active since July 15, 2005
242 MERRICK RD, SUITE 301, ROCKVILLE CENTRE, NY 11570(516) 536-1455(516) 536-1598 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Ronald A. Primis M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

RONALD A. PRIMIS M.D. (NPI 1730188343) is an individual hematology & oncology provider in Rockville Centre, New York, licensed in New York (094624) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1730188343
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameRONALD A. PRIMISCredential: M.D.
Location Address242 MERRICK RD, SUITE 301Rockville Centre, NY 11570-5254
Mailing Address242 Merrick Rd, Suite 301Rockville Centre, NY 11570-5254 · (516) 536-1455 · Fax (516) 536-1598
Phone(516) 536-1455
Fax(516) 536-1598
Sole ProprietorNo
Enumeration DateJuly 15, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1730188343 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in NY · 094624
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
242 MERRICK RD, Rockville Centre, NY 11570
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Other Identifiers 2

Medicaid00385617NY
OtherW15181Group#

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. MAUREEN IMELDA REESE PA
Physician Assistant
242 MERRICK RD
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 536-7336
MANISH B UNDAVIA M.D.
Internal Medicine (Clinical Cardiac Electrophysiology)
242 MERRICK RD, SUITE 402
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 763-2800
RICHARD HOROWITZ M.D.
Internal Medicine (Cardiovascular Disease)
242 MERRICK RD, SUITE 402
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 763-2800
RICHARD M. LEE MD
Internal Medicine (Hematology & Oncology)
242 MERRICK RD, SUITE 301
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 536-1455
VARVARA ALEXIADIS MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
242 MERRICK RD, STE 403
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 536-3700
MARK A KESSLER M.D.
Internal Medicine (Cardiovascular Disease)
242 MERRICK RD, SUITE 402
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 763-2800
DOUGLAS LAX DO
Internal Medicine (Nephrology)
242 MERRICK RD, SUITE 304
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 764-7070
ALLERGY & ASTHMA CARE OF LI, PC
Allergy & Immunology
242 MERRICK RD, SUITE 401
ROCKVILLE CENTRE, NY 11570
Nassau County (516) 536-7336

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Ronald Primis's NPI number?

The NPI number for Ronald Primis is 1730188343. It was assigned to this individual provider in the NPPES registry on July 15, 2005.

Where is Ronald Primis located?

Ronald Primis practices at 242 Merrick Rd Suite 301, Rockville Centre, NY 11570. The listed phone number is (516) 536-1455.

What is Ronald Primis's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

When was this NPI record last updated?

The NPPES record for Ronald Primis was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 32 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.