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Medical Director

Ryan P. O'Quinn, MD

Diplomate of the American Board of Dermatology


Dr. O’Quinn returned to San Antonio in 2002 and established the South Texas Skin Cancer Center with the goal of providing the very best treatment possible for patients with cutaneous malignancy.  In addition, he is Medical Director of the South Texas Ambulatory Surgery Center.


Dr. O'Quinn is married with 2 children. 


Ryan P. O’Quinn, MD, a third-generation native of San Antonio, completed his BS in Biology at Baylor University.  He received his Doctor of Medicine degree from the University of Texas Medical Branch in Galveston where he graduated as one of the top students in his class and was elected to the Alpha Omega Alpha Medical Honor Society.  While in medical school, Dr. O’Quinn decided to leave his home state of Texas to train in the very best programs available for his post-graduate medical education.  Dr. O’Quinn completed a medical internship at the Yale School of Medicine/Yale-New Haven Hospital in Connecticut prior to beginning residency in the Division of Dermatology at Vanderbilt University Medical Center in Nashville, Tennessee.  At Vanderbilt, he served as Chief Resident in his final year of training.  Dr. O’Quinn then went to Pittsburgh, Pennsylvania to complete his training in the most competitive Mohs Micrographic Surgery/Dermatologic Surgery fellowship under the direction of two true surgical pioneers, Dr. David G. Brodland and Dr. John A. Zitelli (one of Dr. Frederic Mohs’ original students).

American Academy of Dermatology Membership Status:

American Board of Dermatology:
Diplomate, 2001

Undergraduate Education:
Baylor University, BS Biology, 1989-1993

Medical School:
University of Texas Medical Branch, 1993-1997

Post-Graduate Medical Training:
Internship, Department of Internal Medicine, Yale University School of Medicine/Yale-New Haven Hospital, 1997-1998

Residency, Division of Dermatology, Vanderbilt University Medical Center, 1998-2001

Fellowship Training:
Mohs Micrographic Surgery and Cutaneous Oncology (ACMMSCO Certified), University of Pittsburgh/Shadyside Hospital (Program Director: John A. Zitelli, MD), 2001-2002

Specialized Training/Clinical Interests:
Dermatologic Surgery
Mohs Micrographic Surgery
Cutaneous Oncology
Transplant Dermatology

Group Practice Affiliations:
Medical Director, South Texas Ambulatory Surgery Center

Hospital Affiliations:
Baptist Health System Hospitals

Health Insurance Participation:
Dr. O’Quinn participates in Medicare and most major and regional PPOs and HMOs.  Please see here for a complete list.

Continuing Medical Education Status:

Physician Assistant
Courtney S. Aldridge, PA-C

AAPA & NCCPA Certification


Courtney Sprague Aldridge, PA-C, grew up in North Carolina and San Antonio.  She graduated from Texas A&M University with a BS in Genetics in 1998.  After teaching high school for two years, Courtney decided to return to school to become a Physician Assistant.  She completed a three-year program in the School of Allied Health at the University of  Texas Health Science Center at San Antonio where she graduated Summa Cum Laude in the very competitive Physician Assistant program.  She passed her National Examination as a certified PA in 2002.  Following graduation, Courtney worked for five years in a busy medical and cosmetic dermatology practice under the direction of Dr. Vivian Bucay.  She joined Dr. O’Quinn at the South Texas Skin Cancer Center in 2007. 

Courtney Aldridge has a hand in all parts of the practice working as a team with Dr. O’Quinn, including pre-operative consultations, post-operative care, timely patient communication, and assisting Dr. O’Quinn in surgical procedures.  Courtney is a gifted Physician Assistant with extensive knowledge of dermatology.

Courtney continues to hold an appointment as Adjunct Clinical Faculty of the School of Allied Health at the University of Texas Health Science Center at San Antonio, and trains PA students as a Clinical Preceptor.  She has spoken at many Physician Assistant conferences on different topics in dermatology at the State and National Level.  She is a member of the American Association of Physician Assistants, Texas Association of Physician Assistants, and Bexar County Physician Assistant Society.

Courtney is married and blessed with three young children.

National Commission of Certification of Physician Assistants Status:

Certified, 2002


Undergraduate Education:

Texas A&M University, BS Genetics, 1998


Physician Assistant Education:

School of Allied Health, University of Texas Health Science Center at San Antonio, 2002


Academic Appointments:

Clinical Adjunct Faculty, School of Allied Health, University of Texas Health Science Center at San Antonio



American Association of Physician Assistants

Texas Association of Physician Assistants

Bexar County Physician Assistant Society

San Antonio Dermatological Society


Continuing Medical Education Status:


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