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

Alexander Katz, MD

Individual provider Family Medicine Physician · NPI 1699889261

Alexander Katz, MD is a Family Practice in Brooklyn, New York. Qualified in 1996, 30 years ago. Practices with Mass General Brigham Medical Group Northern Massachusetts Inc, a 819-clinician group and accepts Medicare assignment. Licensed in Massachusetts and New York.

Years since qualifying
30
Licensed in
MA, NY
In the registry since
2006
Specialties on file
2
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

331 Kings Hwy
Brooklyn, NY 11223-1443
Phone: (646) 490-0017
Fax: (718) 889-7563
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 254924-01 (NY)
Family Medicine Physician Taxonomy 207Q00000X · Licence 226433 (MA)

Record details

NPI number1699889261
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 19, 2006
Last updated in NPPESSeptember 25, 2025
Certification dateSeptember 25, 2025

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1996 (30 years in practice)
Group practice Mass General Brigham Medical Group Northern Massachusetts Inc — 819 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations7 on file with Medicare

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