Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Joseph Marcel-Saint-Louis Demertine, MD

Individual provider General Practice Physician · NPI 1427007822

Dr. Joseph Marcel-Saint-Louis Demertine, MD is a General Practice Physician in Boston, Massachusetts. Practices as a sole proprietor. Licensed in Massachusetts and New York.

Licensed in
MA, NY
In the registry since
2006
Specialties on file
7
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

581 Boylston St 800
Boston, MA 02116-3608
Phone: (617) 247-1400
Fax: (617) 247-1411
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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 233842 (NY)
General Practice Physician Taxonomy 208D00000X · Licence 76898 (MA)
Public Health & General Preventive Medicine Physician Taxonomy 2083P0901X · Licence 76898 (MA)
Geriatric Medicine (Family Medicine) Physician Taxonomy 207QG0300X · Licence 76898 (MA)
Hospitalist Physician Taxonomy 208M00000X · Licence 76898 (MA)
Family Medicine Physician Taxonomy 207Q00000X · Licence 76898 (MA)
Emergency Medical Services (Emergency Medicine) Physician Taxonomy 207PE0004X · Licence 76898 (MA)

Record details

NPI number1427007822
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 10, 2006
Last updated in NPPESFebruary 22, 2017

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $22 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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