> > > > Dr. Brian Callahan, MD
Dr. Brian Thomas Callahan MD is a male Diagnostic Radiologist, has 6 years of experience and practices in Diagnostic Radiology.
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Dr. Brian Callahan has 2 office locations.
Brian Towell
2200 Bergquist Dr
San Antonio, TX 78236

Phone Number
Locations and availability (2)
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).

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Specialties & Research

Dr. Brian Callahan, MD is board certified in Diagnostic Radiology.

  • He has special expertise in 1 area:
  • Gallbladder Diseases

Education & Awards

Dr. Callahan graduated from UMDNJ Robert Wood Johnson, Piscataway.


Dr. Callahan has 5 hospital affiliations:

  • Beth Israel Deaconess Medical Center 
  • Caritas Holy Family Hospital & Medical Center 

Accepted Insurance Plans

Dr. Callahan accepts these health insurances in at least one office:

  • United Healthcare - 17 plans
  • Unicare - 12 plans
  • Network Health - 2 plans
  • Medicare - 1 plan


  • Spanish

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Additional Information
Where does Dr. Brian T. Callahan practice?
Dr. Brian Callahan practices Diagnostic Radiology near San Antonio, TX.
Additional practice locations include: Andover, MA.
See San Antonio Radiologists.