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

Sheldon D. Leidner, MD

Individual provider Internal Medicine Physician · NPI 1649275280

Sheldon D. Leidner, MD is an Internal Medicine Physician in Monticello, New York. Licensed in New York. Registered with an NPI since 2005.

Licensed in
NY
In the registry since
2005
Specialties on file
2
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

518 Broadway
Monticello, NY 12701-1157
Phone: (845) 794-1600
Fax: (845) 794-0749
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 116318 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 116318 (NY)

Record details

NPI number1649275280
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 20, 2005
Last updated in NPPESMarch 7, 2023
Mailing address111 Maltese Dr, Middletown, NY 10940-2115

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