Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Leonard Kessler, MD

Individual provider Hematology & Oncology Physician · NPI 1942209135

Leonard Kessler, MD is a Hematology & Oncology Physician in Rockville Centre, New York. Licensed in New York. Registered with an NPI since 2005.

Licensed in
NY
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

242 Merrick Rd Ste 301
Rockville Centre, NY 11570-5254
Phone: (516) 536-1455
Fax: (516) 536-1598
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 127415 (NY)

Record details

NPI number1942209135
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 19, 2005
Last updated in NPPESDecember 7, 2009

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