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

Mr. Samuel Kaplan Gretz, MD

Individual provider Internal Medicine Physician · NPI 1134706088

Mr. Samuel Kaplan Gretz, MD is an Internal Medicine Physician in Boston, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2021.

Licensed in
MA
In the registry since
2021
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

800 Washington St
Boston, MA 02111-1552
Phone: (617) 636-5000
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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 288987 (MA)

Record details

NPI number1134706088
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 26, 2021
Last updated in NPPESJune 16, 2021
Certification dateJune 16, 2021

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