Mark Koone, MD, FAAD

Board-Certified Dermatologist
Fellow of the American Academy of Dermatology


Dr. Mark Koone U.S. Dermatology Partners Texoma, Texas

Dr. Mark Koone is board-certified by the American Board of Dermatology and has been in private dermatology practice since 1990. He has practiced with U.S. Dermatology Partners in Texoma – Sherman and Paris, formerly Texoma Dermatology Clinic, since 1993, and he serves as a dermatologist for the Austin College Student Clinic.

Dr. Koone earned a bachelor’s degree magna cum laude from Houston Baptist University with majors in chemistry and biology. He earned a Doctor of Medicine with high honor at Baylor College of Medicine and served an internal medicine internship with Baylor College of Medicine–St. Luke’s Episcopal Hospital. His dermatology residency was served at Duke University Medical Center.

While in practice in Sherman, he has been selected to “Best Doctors in America” every year from 1995 to 2015, has been named a “Texas Super Doctor” in Texas Monthly each year from 2008 to 2015, won the Patient’s Choice Award in 2008 and 2009, and has been named one of “America’s Top Dermatologists” every year from 2008 to 2015.

He currently is a member of the Texas Dermatological Society, where he has been a trustee. He has served as an advisory board member of the American Academy of Dermatology and as president of the Dallas Dermatologic Society. He and his wife have one adult child who lives in Houston.

Clinic Locations

U.S. Dermatology Partners Sherman
U.S. Dermatology Partners Sherman

815 Pecan Grove Road E.
Sherman, TX 75090

(903) 892-2126

U.S. Dermatology Partners Paris
U.S. Dermatology Partners Paris

3435 Pine Mill Road
Paris, TX 75460

(903) 579-7290

What Our Patients Say

Mark Koone, MD
5 Stars  I have been treated by Dr. Koone for many years. He is very personable, knowledgeable and doesn't take long to diagnose and treat the problem you may have. I hope he is in practice many more years and I can continue to be treated by him. –
Source : Healthgrades – Feb 19, 2019
Mark Koone, MD
5 Stars  It was a great experience. –
Source : Healthgrades – Feb 06, 2019
Mark Koone, MD
5 Stars  Dr Koone is the best. He goes beyond what you came in for and knows so much about other conditions. My husband and I have come for several years and Am so happy he is our dermatologist. He treats you like you matter. Ken &Kay Brown –
Source : Healthgrades – Feb 06, 2019

Services Offered By Dr. Koone