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

John L Stock, MD

Individual provider Endocrinology, Diabetes & Metabolism Physician · NPI 1023152618

John L Stock, MD is an Endocrinology, Diabetes & Metabolism Physician in Southborough, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2007.

Licensed in
MA
In the registry since
2007
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

58 Sears Rd
Southborough, MA 01772-1102
Phone: (508) 490-8139
Show map & directions

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

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence 55723 (MA)

Record details

NPI number1023152618
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 16, 2007
Last updated in NPPESJuly 8, 2007
Mailing address58 Sears Rd, Southborough, MA 01772-1102