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

Theresa Callahan, MD

Individual provider Pediatrics Physician · NPI 1861480931

Theresa Callahan, MD is a Pediatric Medicine in Leominster, Massachusetts. Graduated from University of Massachusetts Medical School in 1991, 35 years ago. Practices with Medical Associates Pediatrics, PC, a 4-clinician group and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
35
Trained at
University of Massachusetts Medical School
Licensed in
MA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

100 Hospital Rd Ste 4
Leominster, MA 01453-2253
Phone: (978) 514-6300
Fax: (978) 514-6324
Show map & directions

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

Specialties & licences

Pediatrics Physician (primary) Taxonomy 208000000X · Licence 80890 (MA)

Record details

NPI number1861480931
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 12, 2005
Last updated in NPPESJune 24, 2011

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 1991 (35 years in practice)
Group practice Medical Associates Pediatrics, P.C. — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Leominster