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

Dr. Sheldon Alan Greenspan, MD

Individual provider Adult Medicine Physician · NPI 1508836370

Dr. Sheldon Alan Greenspan, MD is an Adult Medicine Physician in Williston Park, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

637 Willis Ave
Williston Park, NY 11596-1154
Phone: (516) 741-6111
Fax: (516) 741-7539
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Adult Medicine Physician (primary) Taxonomy 207QA0505X · Licence 170066 (NY)

Record details

NPI number1508836370
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJanuary 25, 2006
Last updated in NPPESJuly 27, 2007
Mailing address637 Willis Ave, Williston Park, NY 11596-1154