Our San Antonio - Stone Oak location has closed. Dr. Petr will now see all patients at our San Antonio - Alamo Heights location.

Ryan W. Ahern, MD, FAAD


Board-Certified Dermatologist
Fellowship-Trained Mohs Surgeon
Fellow of the American Academy of Dermatology

Ryan W. Ahern, MD, earned his Medical Doctorate and his Masters of Public Health from Tulane University School of Public Health in New Orleans. He was named to the Alpha Omega Alpha Medical Honor Society before completing an internship in general surgery and a year of training in ear, nose and throat surgery at the University of Florida. His dermatology residency was completed at Tulane University and his procedural dermatology fellowship at Cooper University Hospital in New Jersey. While at Cooper, his focus of training was cutaneous oncology, reconstruction and cosmetic procedures.

Specialties and Affiliations

American College of Mohs Surgery
American Academy of Dermatology
American Society for Dermatologic Surgery
Texas Medical Association

Clinic Locations

What Our Patients Say*

“My dermatologist recommended me to Dr. Ahern because of his specialty. The entire office was friendly, relaxed and awesome! I arrived at least 30 minutes early for my appointment, and they took me 15 minutes before┬ámy scheduled appointment time.” – Cheryl B.

*Results may vary by individual

Services Offered By Dr. Ahern