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

Gregory S Neilley, MD

Individual provider Internal Medicine Physician · NPI 1336117852

Gregory S Neilley, MD is an Internal Medicine Physician in Peterborough, New Hampshire. Licensed in New Hampshire. Registered with an NPI since 2006.

Licensed in
NH
In the registry since
2006
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

454 Old Street Rd Ste 301
Peterborough, NH 03458-1200
Phone: (603) 924-4680
Fax: (603) 924-4977
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 8060 (NH)

Record details

NPI number1336117852
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 9, 2006
Last updated in NPPESNovember 9, 2015
Mailing address454 Old Street Rd, Suite 301, Peterborough, NH 03458-1200

Other providers in Peterborough