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

Dr. William Albert Ketterer, DO

Individual provider Internal Medicine Physician · NPI 1518615111

Dr. William Albert Ketterer, DO is an Internal Medicine Physician in San Antonio, Texas. Works from 3 locations. Licensed in Texas and Virginia.

Licensed in
TX, VA
In the registry since
2022
Specialties on file
5
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.

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Practice location Address checks out

4502 Medical Dr
San Antonio, TX 78229-4402
Phone: (210) 358-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 3551 Roger Brooke Dr, Fort Sam Houston, TX 78234-4504 — (210) 916-7500
  • 1100 Wilford Hall Loop Bldg 4554, Jbsa Lackland, TX 78236-5638 — (210) 292-6255

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence W4736 (TX)
Internal Medicine Physician Taxonomy 207R00000X · Licence W4736 (TX)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
General Practice Physician Taxonomy 208D00000X · Licence 0102208859 (VA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0102208859 (VA)

Record details

NPI number1518615111
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 13, 2022
Last updated in NPPESJuly 20, 2026
Certification dateJuly 20, 2026

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