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

Kate Marie O'Brien, NP

Individual provider Nurse Practitioner · NPI 1609107887

Kate Marie O'Brien, NP is a Nurse Practitioner in Boston, Massachusetts. Qualified in 2009, 17 years ago. Practices with Regents of the Univ of Ca, a 1,578-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
17
Licensed in
MA
In the registry since
2010
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

55 Fruit St
Boston, MA 02114-2621
Phone: (857) 367-1486
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence RN273620 (MA)

Record details

NPI number1609107887
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedJanuary 27, 2010
Last updated in NPPESApril 13, 2026
Certification dateApril 13, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice Regents Of The Univ Of Ca — 1578 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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