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

Marc K Siegel M D LLC

Organization Internal Medicine Physician · NPI 1609126408

Marc K Siegel M D LLC is an Internal Medicine Physician in New York, New York. Registered with an NPI since 2012.

In the registry since
2012
What do these letters mean?
LLC — Limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

251 E 33rd St Fl 3
New York, NY 10016-4804
Phone: (212) 532-1214
Fax: (917) 580-6200
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X

Record details

NPI number1609126408
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Marc Siegel — Owner · (212) 532-1214
NPI enumeratedSeptember 19, 2012
Last updated in NPPESDecember 16, 2024
Certification dateDecember 16, 2024
Mailing address251 E 33rd St Fl 3, New York, NY 10016-4804

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