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 practises 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 Not confirmed with CMS for 15 years — call before visiting
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

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $158 7 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Colleagues at Medical Associates Pediatrics, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Leominster