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

Dr. Johnathan Mack, MD

Individual provider Hematology (Internal Medicine) Physician · NPI 1972982650

Dr. Johnathan Mack, MD is a Hematology (Internal Medicine) Physician in Boston, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts.

Licensed in
MA
In the registry since
2015
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

55 Fruit Street Massachusetts General Hospital Blood Bank GRJ-238
Boston, MA 02114
Phone: (617) 726-3785
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Blood Banking & Transfusion Medicine Physician (primary) Taxonomy 207ZB0001X · Licence 267360 (MA)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence 267360 (MA)

Record details

NPI number1972982650
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 27, 2015
Last updated in NPPESSeptember 8, 2016

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