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

Callie O'Brien, NP

Individual provider Nurse Practitioner · NPI 1407400393

Callie O'Brien, NP is a Nurse Practitioner in Boston, Massachusetts. Qualified in 2019, 7 years ago. Practices with Dana-Farber Cancer Institute, Inc, a 668-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
7
Licensed in
MA
In the registry since
2019
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

75 Francis St
Boston, MA 02115-6106
Phone: (617) 732-5500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 450 Brookline Ave, Boston, MA 02215-5418 — (617) 632-3000

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence RN2294535 (MA)

Record details

NPI number1407400393
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedJuly 29, 2019
Last updated in NPPESJuly 15, 2026
Certification dateJuly 15, 2026
Mailing address75 Francis St, Boston, MA 02115-6106

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2019 (7 years in practice)
Group practice Dana-Farber Cancer Institute, Inc. — 668 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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