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

Individual provider Internal Medicine Physician · NPI 1528030020

Dr. Milton Jack Grunzweig, MD is an Internal Medicine in Brooklyn, New York. Graduated from State University of New York Downstate Medical Center in 1986, 40 years ago. Practices with North Shore Medical Group of the Mount Sinai School of Medicine, a 323-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
40
Trained at
State University of New York Downstate Medical Center
Licensed in
NY
In the registry since
2006
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

2000 Ocean Ave
Brooklyn, NY 11230-7356
Phone: (718) 769-7900
Fax: (718) 743-4219
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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 171780 (NY)

Record details

NPI number1528030020
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 7, 2006
Last updated in NPPESApril 24, 2008

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolSTATE UNIVERSITY OF NEW YORK DOWNSTATE MEDICAL CENTER
Graduated 1986 (40 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

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