Mandy Harting, M.D.

Dr. Mandy Harting attended medical school at the University of Texas Medical School, in Houston, Texas. She completed her internship and dermatology residency at the University of Texas and Baylor College of Medicine. Dr. Harting joined the teaching faculty at the University of Michigan, Department of Dermatology in 2008, where she completed her Mohs surgery and Procedural dermatology fellowship. After leaving Michigan, Dr. Harting joined the Seattle Skin Cancer Center in Seattle, Washington where she practiced Mohs surgery, facial reconstruction, and surgical dermatology of melanomas and other skin cancers.

Our Doctors

Each of our doctors fulfills all requirements for continuing education and re-licensing qualifications in order to stay up to date with breakthroughs in dermatology treatment and technology.  


At The Woodlands and Montgomery Dermatology Associates you will find a group of doctors whose respect for one another and for their patients encourages a relaxed atmosphere where productive answers evolve easily.

Gregory Peterson, MD

Dr. Gregory Peterson graduated from Baylor University in Waco with a degree in Biology and subsequently completed medical school as well as his Internal Medicine intern year at University of Texas Medical Branch in Galveston. Dr. Peterson’s dermatology residency was completed at Baylor University Medical Center in Dallas, where he served as chief resident his final year. He is excited to return to The Woodlands where he grew up. He has special interests in general/medical dermatology, psoriasis and immunologic therapies, and skin cancer diagnosis and treatment. He is a Diplomate of the American Board of Dermatology.

Leslie S. Ledbetter, M.D.

Dr. Ledbetter encourages regular skin checks and makes a point of keeping emergency time slots in her schedule. She practiced in the Conroe area before becoming one of the founders of The Woodlands Dermatology Associates. A Diplomate of the American Board of Dermatology, Dr. Ledbetter received her medical training at the University of Texas - Health Science Center at Houston. Her dermatology residency was completed at Baylor College of Medicine.


Julie Croley, MD

Dr. Croley earned her undergraduate degree from the University of Texas at Austin, where she was an NCAA Academic All-American in Track and Field and won a Big 12 championship. She then completed medical school, internship, dermatology residency, and a fellowship in Mohs (skin cancer) surgery at the University of Texas Medical Branch in Galveston. She is a member of the Alpha Omega Alpha Honor Medical Society and has published over 20 peer-reviewed academic journal articles. Dr. Croley’s special interests include skin cancer surgery, Mohs surgery, and reconstructive surgery.

H. Sam Jeong, MD

Dr. H. Sam Jeong graduated with highest honors from the University of Texas at Austin, where he was a member of the Business Honors and Plan II Honors Programs. He earned his medical degree from the University of Texas Southwestern Medical School, where he served as class president, and completed his dermatology residency at UT Southwestern Medical Center, where he served as Chief Resident of the VA North Texas Health System Division of Dermatology, as well as a Resident Coordinator for the Agape Dermatology Clinic, a free clinic serving Dallas’ underprivileged community. Following his residency training, Dr. Jeong pursued additional training with a fellowship in Dermatopathology at NYU Langone Medical Center. A member of the Alpha Omega Alpha Honor Medical Society and a Diplomate of the American Board of Dermatology, Dr. Jeong’s areas of interest include general/medical dermatology, skin cancer diagnosis and treatment, and dermatopathology. He is excited to establish himself in the Woodlands area.

Larissa Stewart, M.D.

Dr. Stewart earned her undergraduate degree in Biochemistry at the University of Texas at Dallas then received her Doctor of Medicine degree from Baylor College of Medicine, Houston, TX.  Her dermatology residency was completed at The University of Texas Health Science Center - Houston Medical School.  She is a member of Alpha Omega Alpha Honor Medical Society and a Diplomate of the American Board of Dermatology.  Dr. Stewart’s special interests include general dermatology and skin cancer treatment.

Brittany Barros, M.D.

Dr. Barros is a proud graduate of The University of Texas at Austin, where she received a Bachelor of Science degree in Nutritional Sciences with high honors. She completed medical school at The University of Texas Health Science Center Medical School at Houston and then moved to Pennsylvania for internal medicine internship and dermatology residency at Penn State Hershey Medical Center in Hershey, Pennsylvania. Dr. Barros has special interests in dermatology that include pediatric dermatology, autoimmune conditions, as well as the prevention and treatment of skin cancer. A native of The Woodlands, Texas, Dr. Barros is excited to return home and establish her career as a dermatologist with our group. She is a Diplomate of the American Board of Dermatology.

Seema Daulat, MD

Dr. Seema Daulat, a native Texan and University of Texas at Austin magna cum laude graduate, earned her Doctorate of Medicine (MD) at The University of Texas Southwestern Medical School. As a medical student, she regularly volunteered at the Agape Clinic serving Dallas’ underprivileged community.

Following medical school, Dr. Daulat completed both an internal medicine internship at the University of Washington, Seattle, as well as a cutaneous oncology research fellowship at MD Anderson Cancer Center. While at MD Anderson Dr. Daulat performed clinical trials that ultimately led to FDA approval of new treatments for skin cancer and cutaneous lymphoma.

Dr. Daulat completed her dermatology residency training at the University of Texas at Houston and MD Anderson Cancer Center. Her interest in clinical research has led her to contribute articles to top peer-reviewed dermatology journals, including the Journal of the American Academy of Dermatology. She believes that helping to advance the field of dermatology also enables her to take better care of her patients.

Previously, Dr. Daulat practiced in Austin where she focused on medical, surgical, and cosmetic dermatology. In her free time, she loves fitness, cooking, and world travel. She is fluent in English and Spanish and loves the challenge of learning new languages.

Holly Hazlett, M.D.

After receiving her Doctor of Medicine Degree from The University of Texas Health Science Center at Houston and completing her dermatology residency there, Dr. Hazlett practiced dermatology with the Kelsey Seybold Clinic. In 2003 she fulfilled her dream and established The Woodlands Dermatology Associates. Dr. Hazlett is a member of the medical honor society Alpha Omega Alpha and is a Diplomate of the American Board of Dermatology.

Joel Hyman, M.D.

Dr. Hyman earned his undergraduate degree in Biomedical Science from Texas A&M University then received his Doctor of Medicine degree from the University of Texas Medical School at San Antonio. His dermatology residency was completed at the University of Missouri. He is a member of Alpha Omega Alpha and a Diplomate of the American Board of Dermatology. Dr. Hyman's special interests include psoriasis and skin cancer treatment.

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Dermatology, Surgical and Cosmetic Services

Holly Reid, MD

Dr. Holly Harper Reid earned her undergraduate degree in Biomedical Science from Texas A&M University and her medical degree from The University of Texas Health Science Center at Houston. She then completed her residency training at the UT Houston MD Anderson Cancer Center Dermatology Residency Program, where she served as chief resident. She is a member of Alpha Omega Alpha and a Diplomate of the American Board of Dermatology. Her special interests include general dermatology, pediatric dermatology, and skin cancer detection and treatment. Dr. Reid grew up in The Woodlands and is excited to be returning as part of The Woodlands Dermatology Associates.