Mark Koone, MD, FAAD


Board-Certified Dermatologist
Fellow of the American Academy of Dermatology

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.

What Our Patients Say

Mark Koone, MD
5 Stars  I see Dr. Koone twice annually and more if needed. This was my regular semi annual visit. Dr. Koone is very thorough, patient and provides excellent care. –
Source : Healthgrades – Nov 21, 2019
Mark Koone, MD
5 Stars  I called and was given a spot the same day. I had a less than 10 min. wait. He was able to take care of my need in a timely manner and checked for other areas that might be more of the same thing. He has sent it for a biopsy to be sure it is what he thinks. I felt cared for and taken care of. –
Source : Healthgrades – Nov 15, 2019
Mark Koone, MD
5 Stars  Great Doctor! Experienced & kind. None better! –
Source : Healthgrades – Nov 15, 2019

Services Offered By Dr. Koone