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

Individual provider Internal Medicine Physician · NPI 1649342627

Dr. William Tatsuo Kasumi, MD is an Internal Medicine in Hackensack, New Jersey. Graduated from Albert Einstein College of Medicine of Yeshiva University in 1996, 30 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in New Jersey and New York.

Years since qualifying
30
Trained at
Albert Einstein College of Medicine of Yeshiva University
Licensed in
NJ, 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

401 Hackensack Ave Fl 5
Hackensack, NJ 07601-6406
Phone: (201) 678-1900
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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 25MA06876200 (NJ)
Internal Medicine Physician Taxonomy 207R00000X · Licence 210028 (NY)

Record details

NPI number1649342627
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 14, 2006
Last updated in NPPESMay 25, 2019

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesFAMILY PRACTICE
Medical schoolALBERT EINSTEIN COLLEGE OF MEDICINE OF YESHIVA UNIVERSITY
Graduated 1996 (30 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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