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

Margaret Callahan, MD

Individual provider Medical Oncology Physician · NPI 1508098534

Margaret Callahan, MD is a Hematology/Oncology in Farmington, Connecticut. Qualified in 2007, 19 years ago. Practices with University of Connecticut Health Center, a 628-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Connecticut and New York.

Years since qualifying
19
Licensed in
CT, NY
In the registry since
2009
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

263 Farmington Ave
Farmington, CT 06030
Phone: (860) 679-2100
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1275 York Ave, New York, NY 10065-6007 — (800) 585-4118

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 075986 (CT)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 251318-1 (NY)

Record details

NPI number1508098534
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 9, 2009
Last updated in NPPESJanuary 16, 2024
Certification dateJanuary 16, 2024
Mailing address263 Farmington Ave, Farmington, CT 06030-8082

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice University Of Connecticut Health Center — 628 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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