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

Dr. John Mascarenhas, MD

Individual provider Hematology & Oncology Physician · NPI 1376719104

Dr. John Mascarenhas, MD is a Hematology in New York, New York. Graduated from New York Medical College in 2002, 24 years ago. Practices with Icahn School of Medicine at Mount Sinai, a 2,791-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
24
Trained at
New York Medical College
Licensed in
NY
In the registry since
2008
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

1 Gustave L Levy Pl Box 1079
New York, NY 10029-6500
Phone: (212) 241-1948
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 235966 (NY)

Record details

NPI number1376719104
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 1, 2008
Last updated in NPPESJuly 7, 2008

Medicare enrollment

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

Medicare specialtyHEMATOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 2002 (24 years in practice)
Group practice Icahn School Of Medicine At Mount Sinai — 2791 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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