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

Individual provider Internal Medicine Physician · NPI 1326229691

Dr. Heustein Sy, MD practises 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

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients95
Services billed 265 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at North Shore-Lij Medical PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 6350 clinicians in the practice; 12 are shown here.

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