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

Dr. John Tloczkowski, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1730402702

Dr. John Tloczkowski, MD is an Endocrinology in Greenlawn, New York. Graduated from State University of Ny Upstate Medical University in 2007, 19 years ago. Practices with North Shore Medical Group of the Mount Sinai School of Medicine, a 323-clinician group, accepts Medicare assignment and offers telehealth. Licensed in New York.

Years since qualifying
19
Trained at
State University of Ny Upstate Medical University
Licensed in
NY
In the registry since
2010
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

5 Cuba Hill Rd
Greenlawn, NY 11740-1624
Phone: (631) 628-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 257389 (NY)

Record details

NPI number1730402702
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 5, 2010
Last updated in NPPESDecember 7, 2023
Certification dateDecember 7, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyENDOCRINOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolSTATE UNIVERSITY OF NY UPSTATE MEDICAL UNIVERSITY
Graduated 2007 (19 years in practice)
Group practice North Shore Medical Group Of The Mount Sinai School Of Medicine — 323 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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