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

John Warren Sullivan, MD

Individual provider Neurology Physician · NPI 1275506578

John Warren Sullivan, MD is a Neurology Physician in Longmeadow, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
In the registry since
2006
Specialties on file
2
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

175 Dwight Rd Ste 301
Longmeadow, MA 01106
Phone: (413) 737-4746
Fax: (413) 565-2297
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Neurophysiology Physician (primary) Taxonomy 2084N0600X · Licence 35840 (MA)
Neurology Physician Taxonomy 2084N0400X · Licence 35840 (MA)

Record details

NPI number1275506578
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 8, 2006
Last updated in NPPESJuly 13, 2026
Mailing address175 Dwight Rd, Ste 301, Longmeadow, MA 01106