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

Gillian Katz MD, PLLC

Organization Endocrinology, Diabetes & Metabolism Physician · NPI 1235363615

Gillian Katz MD, PLLC is an Endocrinology, Diabetes & Metabolism Physician in New York, New York. Licensed in New York. Registered with an NPI since 2009.

Licensed in
NY
In the registry since
2009
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

See every abbreviation used in this directory →

Practice location Address checks out

166 5th Ave 2nd Fl
New York, NY 10010-5909
Phone: (646) 421-6062
Fax: (646) 895-7604
Show map & directions

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

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 183999-1 (NY)

Record details

NPI number1235363615
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Gillian Katz — Owner · (646) 421-6062
Other names Gillian Katz M.D., Pllc
NPI enumeratedMay 13, 2009
Last updated in NPPESMay 13, 2009
Mailing address166 5th Ave, 2nd Floor, New York, NY 10010-5909

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