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

Elisa A. O'Brien, APRN

Individual provider Family Nurse Practitioner · NPI 1912262973

Elisa A. O'Brien, APRN is a Nurse Practitioner in Greenwich, Connecticut. Qualified in 2011, 15 years ago. Practices with Northeast Medical Group Inc, a 1,360-clinician group and accepts Medicare assignment. Licensed in Connecticut.

Years since qualifying
15
Licensed in
CT
In the registry since
2012
Specialties on file
2
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

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Practice location Address checks out

17 Woods Ave
Greenwich, CT 06831-3633
Phone: (203) 531-0729
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 004842 (CT)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 073864 (CT)

Record details

NPI number1912262973
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN
Sole proprietorYes
NPI enumeratedJuly 5, 2012
Last updated in NPPESMarch 19, 2014

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice Northeast Medical Group Inc — 1360 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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