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

Dr. Karen Anne Obrien, MD

Individual provider Internal Medicine Physician · NPI 1508870957

Dr. Karen Anne Obrien, MD is registered under Hospice/Palliative Care in Boston, Massachusetts. Graduated from Warren Alpert Medical School of Brown University in 1989, 37 years ago. Practices with Massachusetts General Physicians Organization Inc, a 3,484-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts.

Years since qualifying
37
Trained at
Warren Alpert Medical School of Brown University
Licensed in
MA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

55 Fruit S Founders 600
Boston, MA 02114-2696 Not confirmed with CMS for 12 years — call before visiting
Phone: (617) 724-9197
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospice and Palliative Medicine (Internal Medicine) Physician (primary) Taxonomy 207RH0002X · Licence 76179 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 76179 (MA)

Record details

NPI number1508870957
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2006
Last updated in NPPESJuly 7, 2014

Medicare enrollment

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

Medicare specialtyHOSPICE/PALLIATIVE CARE
Also practisesINTERNAL MEDICINE
Medical schoolWARREN ALPERT MEDICAL SCHOOL OF BROWN UNIVERSITY
Graduated 1989 (37 years in practice)
Group practice Massachusetts General Physicians Organization Inc — 3484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients129
Services billed 614 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Massachusetts General Physicians Organization Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3484 clinicians in the practice; 12 are shown here.

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