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

Carolyn M O'Brien, NP

Individual provider Nurse Practitioner · NPI 1104815539

Carolyn M O'Brien, NP is a Nurse Practitioner in Franklin, Massachusetts. Qualified in 1996, 30 years ago. Practices with Umass Memorial Medical Group Inc, a 2,467-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
30
Licensed in
MA
In the registry since
2005
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

31 Daniels St
Franklin, MA 02038-1103
Phone: (508) 530-3140
Fax: (508) 538-3142
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 100 Commerce Dr, Northbridge, MA 01534-1415 — (508) 234-6311

Specialties & licences

Adult Health Nurse Practitioner (primary) Taxonomy 363LA2200X · Licence 190716 (MA)
Nurse Practitioner Taxonomy 363L00000X · Licence RN190716 (MA)

Record details

NPI number1104815539
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorYes
NPI enumeratedOctober 18, 2005
Last updated in NPPESAugust 28, 2025
Certification dateAugust 28, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1996 (30 years in practice)
Group practice Umass Memorial Medical Group Inc — 2467 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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