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

Derek A Barclay, MD

Individual provider Medical Toxicology (Emergency Medicine) Physician · NPI 1801820659

Derek A Barclay, MD is a Medical Toxicology (Emergency Medicine) Physician in Boston, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Partly verified

Some contact details are missing from the federal record.

Brigham And Women's Hospital 75 Francis Street Neville House
Boston, MA 02115
Phone: (617) 732-5656
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Toxicology (Emergency Medicine) Physician (primary) Taxonomy 207PT0002X · Licence 226628 (MA)

Record details

NPI number1801820659
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 10, 2006
Last updated in NPPESJuly 8, 2007
Mailing address20 Norris St, Apartment #2, Cambridge, MA 02140-1815

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