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

Dr. Heustein Sy, MD

Individual provider Internal Medicine Physician · NPI 1326229691

Dr. Heustein Sy, MD is an Internal Medicine in New York, New York. Qualified in 2001, 25 years ago. Practices with North Shore-Lij Medical PC, a 6,350-clinician group and accepts Medicare assignment. Licensed in New Jersey and New York.

Years since qualifying
25
Licensed in
NJ, NY
In the registry since
2007
Specialties on file
3
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

100 E 77th St
New York, NY 10075-1850
Phone: (212) 434-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 276346-1 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 25MA09276600 (NJ)
Neurocritical Care Physician Taxonomy 2084A2900X · Licence 276346-1 (NY)

Record details

NPI number1326229691
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 15, 2007
Last updated in NPPESJanuary 8, 2021
Certification dateJanuary 8, 2021

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesNEUROLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice North Shore-Lij Medical Pc — 6350 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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