Division Chief

Sandra S. Osswald, M.D.
Medical School: Boston University School of Medicine, HPSP Air Force Scholarship Program, Boston, MA
Internship: Internal Medicine, Keesler USAF Medical Center, Biloxi, MS
Residency: Dermatology, San Antonio Uniformed Services Health Education Consortium (SAUSHEC), San Antonio, TX; Internal Medicine, Keesler USAF Medical Center, Biloxi, MS
Post-Doctoral Fellowship: Dermatopathology, AFIP Armed Forces Institute of Pathology, Washington, DC
Email: osswald@uthscsa.edu
Academic office: 210-450-6355
Practice: 210-450-9840
Fax No. 210-450-6092

Faculty

Mary D. Altmeyer, M.D.
Assistant Professor
Medical School: Tulane University School of Medicine, New Orleans, LA
Internship: Medicine, Tulane University School of Medicine, New Orleans, LA
Residency: Dermatology, Tulane University School of Medicine, New Orleans, LA
Post-Doctoral Fellowship: Dermatopathology, Tulane University School of Medicine, New Orleans, LA
Email Address: altmeyerM@uthscsa.edu
Practice: 210-450-9840
Fax No.: 210-450-6092

Emily M. Becker, M.D.
Assistant Professor
Medical School: University of Texas Health Science Center at San Antonio
Residency: Dermatology, University of Texas Health Science Center at San Antonio; Pediatric,
Children’s hospital of New york, Columbia Presbyterian, New York
Fellowship: Psoriasis Clinical Research, University of California San Francisco, San Francisco, CA;
Pediatric Dermatology, University of Texas Health Science Center at San Antonio
Email Address: beckere@uthscsa.edu
Practice: 210-450-9840
Fax No.: 210-450-6092

Teagan Charles, PA-C
Physician Assistant
Medical School: University of Texas Health Science Center at San Antonio, School of Health Professions
Email Address: charlest@uthscsa.edu
Practice: 210-450-9840
Fax No.: 210-459-6092

Robert T. Gilson, M.D.
Residency Program Director, Associate Professor
Medical School attended: University of Texas Health Science Center at Houston
Fellowship: Internal medicine, Keesler Medical Center, Mississippi
Residency: Dermatology, SAUSHEC, completed 1999. Internal medicine, Keesler completed 1991
Email Address: gilsonr@uthscsa.edu
Practice: 210-450-9840
Fax No.: 210-450-6092

James R. Neiner, M.D. 
Assistant Professor
Medical School: F. Edward Hebert School of Medicine, Bethesda, MD
Fellowship: Dermatologic Surgery Specialists, Macon, GA
Transitional Internship: San Antonio Military Medical Center, San Antonio, TX
Residency: San Antonio Military Medical Center, San Antonio, TX
Email Address: neiner@uthscsa.edu
Practice: 210-450-9840
Fax No.: 210-450-6092

Holly H. Volz, M.D.
Assistant Professor
Medical School: University of Texas Health Science Center at San Antonio
Residency: Dermatology, University of Texas Health Science Center at San Antonio
Internship: Internal Medicine Preliminary, University of Texas Health Science Center at San Antonio
Email Address: volz@uthscsa.edu
Practice: 210-450-9840
Fax No.: 210-450-6092

Yang Xia, M.D. 
Assistant Professor
Medical School: Uniformed Services University of Health Sciences, Bethesda, MD
Fellowship: Mohs Micrographic Surgery & Procedural Dermatology Fellowships, Scripps Clinic/Foundation, La Jolla, CA
Residency: National Capital Consortium Dermatology Residency Program, Walter Reed Army Medical Center, Washington, DC & National Naval Medical Center, Bethesda, MD
Email Address: xiay@uthscsa.edu
Practice: 210-450-9840
Fax No.: 210-450-6092

Cross-Appointed Faculty

Richard Keller, M.D.
Professor
Medical School: Louisiana State University School of Medicine, New Orleans, LA
Internship: Transitional Medicine, Brooke Army Medical Center, Ft. Sam Houston, TX
Residency: Dermatology, Brooke Army Medical Center, Ft. Sam Houston, TX
Fellowship: Mohs Micrographic Surgery, Brooke Army Medical Center, Ft. Sam Houston, TX
Email: richard.keller4@va.gov
Practice: 210-949-9248

Catherine Kowalewski, DO
Associate Professor
Medical School: University of Health Sciences College of Osteopathic Medicine, Kansas City, MI
Residency: Dermatology, University of Texas Health Science Center at San Antonio; Internal Medicine, Ochsner Clinic Foundation, New Orleans, LA & University of Texas Health Science Center at San Antonio
Email: Catherine.kowalewski@va.gov
Practice: 210-949-9248

Eric W. Kraus, MD
Professor
Medical School: University of Texas Health Science Center at San Antonio
Residency: Dermatology, Brook Army Medical Center, Ft. Sam Houston, TX
Internship: Rotating, Wm Beaumont Army Medical Center, El Paso, TX
Email: eric.kraus@va.gov
Practice: 210-949-9248

Jennifer Krejci-Manwaring, MD
Assistant Professor
Medical School: University of Texas Medical School at Houston
Residency: University of Kansas Medical Center, Kansas, KS
Internship: Internal Medicine, University of Texas Medical School at Houston
Fellowship: Dermatology Research, Wake Forest University School of Medicine, Winston-Salem, North Carolina, NC
Email: jennifer.krejci-manwaring@va.gov
Practice: 210-949-9248

Richard Phillip Usatine, M.D.
Professor
Medical School: Columbia University College of Physicians and Surgeons, New York, NY
Internship: the University of California at Los Angeles (UCLA) Family Medicine
Residency: the University of California at Los Angeles (UCLA) Family Medicine
Fellowship: Medical Education, UCLA
Email: usatine@uthscsa.edu
Academic Office: 210-358-3200
Practice: 210-358-3650