Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Charles Calais, DO

Individual provider Allergy & Immunology (Internal Medicine) Physician · NPI 1831416197

Charles Calais, DO is an Allergy/Immunology in San Antonio, Texas. Graduated from Philadelphia College of Osteopathic Medicine in 2010, 16 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Texas and Virginia.

Years since qualifying
16
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
TX, VA
In the registry since
2010
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

1219 McCullough Ave
San Antonio, TX 78212-4811
Phone: (210) 226-3500
Fax: (210) 226-3638
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology (Internal Medicine) Physician (primary) Taxonomy 207RA0201X · Licence R8534 (TX)
Allergy & Immunology (Internal Medicine) Physician Taxonomy 207RA0201X · Licence 0102203064 (VA)

Record details

NPI number1831416197
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedApril 27, 2010
Last updated in NPPESJanuary 20, 2025
Certification dateJanuary 20, 2025
Mailing address1219 McCullough Ave, San Antonio, TX 78212-4811

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2010 (16 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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