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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Theresa Callahan:

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  1. Qualifications
  2. What's important to you

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Patient Reviews

Patient comments (1)

The overall average patient rating of Dr. Theresa Callahan is Excellent. Dr. Callahan has been reviewed by 12 patients who have provided 1 comments. The rating is 4.5 out of 5 stars.

Patient Ratings
Ease of Appointment 3.8
Promptness 4.8
Courteous Staff 4.6
Accurate Diagnosis 4.8
Bedside Manner 5.0
Spends Time with Me 4.8
Follows Up After Visit 4.8

Specialties & Research

Dr. Theresa Callahan, MD is board certified in Pediatrics.

Education & Awards

Dr. Callahan graduated from University of Massachusetts, Worcester. She has 3 awards.

Castle Connolly's Top Doctors™ (2012 - 2013)
Compassionate Doctor Recognition (2015)
On-Time Doctor Award (2015)


Dr. Callahan has 10 hospital affiliations:

  • Clinton Hospital 
  • Marlborough Hospital 


  • Spanish

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Additional Information
Dr. Theresa M Callahan MD is a female Pediatrician, has 21 years of experience and practices in Pediatrics.
Where does Dr. Theresa M. Callahan practice?
Dr. Theresa Callahan has 1 office location.
Dr. Theresa Callahan practices Pediatrics near Leominster, MA.
See Leominster Pediatricians.