All professionals at Great Plains Dermatology maintain the highest levels of accreditation and pursue ongoing education to stay abreast of the latest trends in the medical field. Read on to learn more about our staff's experience and training.

Donald Tillman


Dr. Donald Tillman started serving Western Kansas as a Dermatologist in 1992. He opened Great Plains Dermatology in 1994. He received his medical degree from Nova Southeastern University College of Osteopathic Medicine. He is board certified in General Practice, Dermatology, and Mohs surgery. He is a fellow of the American Osteopathic College of Dermatology, American Academy of Dermatology, American Society of Mohs Surgery, and the American Society of Dermatologic Surgery. He is currently serving on the board of the American Osteopathic College of Dermatology.

Dr. Tillman has a special interest in the treatment of skin cancer. He has performed over 5,000 cases of Mohs micrographic surgery since 2009.

Nicole Hibbs


Dr. Nicole (Tillman) Hibbs joined Great Plains Dermatology 2017. Dr. Hibbs graduated with a Bachelor of Science in Biology from Westmont College in 2009. She received her medical degree from A.T. Still University in 2013. She completed her Dermatology residency from Kirksville, Missouri in 2017. Dr. Hibbs is a Board-Certified Dermatologist and Fellow of the American Society of Mohs Surgery.

Julie Brull


Julie Brull joined Great Plains Dermatology in 2008. She is a Board Certified Advanced Registered Family Nurse Practioner through the American Nurses credentialing center (ANCC). Julie earned both her undergraduate degree, a B.S. in Nursing in 2000, and her graduate degree, a M.S. in Family Nurse Practioner and Nursing Administration in 2004, from Fort Hays State University.

Madysen Weigel


Madysen Weigel joined Great Plains Dermatology in 2021. She is a Board Certified Advanced Registered Family Nurse Practitioner (APRN- C) through the American Association of Nurse Practitioners. Madysen earned her undergraduate degree, an Associates Degree in Nursing in 2017, and her graduate degree, a Post-Masters Certificate in Family Nurse Practitioner in 2021 from Herzing University.