NPI age
16 years
Enumerated 2010-04-27
● Active
Type 1 · Individual
Charles Calais, D.O
Calais is 1 of 5 internal medicine providers in San Antonio and 1 of 63 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX, VA
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-01-20
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 63 active internal medicine providers in Texas.
NPI age
16 years
↓ 2 yr below median (18 yr)
State licenses
2 states
Top 77% — 22% of peers are multi-state
Subspecialties
0
54% of peers hold subspecialties
NPI lifetime · 2010 → 2026
2010-04Enumerated in NPPES
2010
2026
Where they practice
Practice location
1219 McCullough Ave
San Antonio, TX 782124811
Mailing address
1219 McCullough Ave
San Antonio, TX 782124811
Specialties
-
Internal Medicine PrimaryAn internist doctor of osteopathy that specializes in the treatment of allergy and immunologic disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine can obtain a...
Practice context
Part of a multi-provider practice. 3 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 →
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