Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Groton Medical Associates

Q: What type of organization is Groton Medical Associates?

Groton Medical Associates is registered in NPPES as a Nurse Practitioner (its primary provider taxonomy).

Nurse Practitioner in Groton, MA · enumerated 2016 · authorized official Dorothy Christiansen, Business Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1083158976

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Registry record

Entity type Organization (Type 2)

Legal business name Groton Medical Associates

Practice address 100 Boston Rd, Suite E, Groton, MA, 01450

Phone (978) 448-4300

Enumeration date Dec 12, 2016

Last updated in NPPES Dec 12, 2016

Taxonomy & classification

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2286905 (MA) Primary

Authorized official

Name Dorothy Christiansen

Title Business Owner

Phone (978) 448-4300

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Groton Medical Associates?

Groton Medical Associates is registered in NPPES as a Nurse Practitioner (its primary provider taxonomy).

Providers at this address

Browse all →

Mark Francis Pediatrics Physician · Groton, MA NPI 1104813302 Dorothy Christiansen Rheumatology Physician · Groton, MA NPI 1558348953 Alfred Heinser Internal Medicine Physician · Groton, MA NPI 1871570218 Thomas Goodman Rheumatology Physician · Groton, MA NPI 1194702555 Karen Hiltunen Pediatrics Physician · Groton, MA NPI 1700864154 Jessica Amorosino Pediatrics Physician · Groton, MA NPI 1487601845 Paula Vaughan Medical Physician Assistant · Groton, MA NPI 1326154279 Groton Medical Associates, LLC Internal Medicine Physician · Groton, MA NPI 1144362740

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-12.