NPI age
19 years
Enumerated 2007-02-12
● Active
Type 1 · Individual
DR. Brian Thomas Callahan, M.D.
Callahan is 1 of 4 radiology providers in Lackland A F B and 1 of 3776 in Texas.
Primary specialty
Radiology
Plus 1 subspecialty
Licensed in
MA
1 state
Status
Active
No deactivations on record
Last NPPES update
2010-09-02
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 3776 active radiology providers in Texas.
NPI age
19 years
≈ at median (19 yr)
State licenses
1 state
18% of peers hold multiple states
Subspecialties
1
In the 36% of peers with subspecialties
NPI lifetime · 2007 → 2026
2007-02Enumerated in NPPES
2007
2026
Where they practice
Practice location
2200 Bergquist Dr
Lackland A F B, TX 782369907
Mailing address
5 Myrtlewood
San Antonio, TX 782186000
Specialties
-
Radiology PrimaryA radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
-
RadiologyA radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging.
Practice context
Part of a multi-provider practice. 124 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
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