Mark Koone, MD, FAAD | U.S. Dermatology Partners in Texoma, TX
Our San Antonio - Stone Oak location has closed. Dr. Petr will now see all patients at U.S. Dermatology Partners San Antonio.

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.

Clinic Locations

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

815 E Pecan Grove Road
Sherman, TX 75090

(903) 892-2126

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

2725 NE Loop 286
Paris, TX 75460

(903) 579-7290

What Our Patients Say

Mark Koone, MD
5 Stars  Excellent doctor. Has taken care of my husband and myself for many years now. We recommend him very highly!! –
Source : Healthgrades – Aug 04, 2018
Mark Koone, MD
5 Stars  Dr Koone gets right to the issue and takes care of my concern quickly which is great. –
Source : Healthgrades – Aug 03, 2018
Mark Koone, MD
5 Stars  Dr. Koone is an excellent doctor! He is very thorough and listens to his patients. –
Source : Healthgrades – Jul 22, 2018

Services Offered By Dr. Koone