Dr. Gallagher is board-certified in dermatology and is a board-certified Mohs surgeon. He is a member of the Boulder County Medical Society and a fellow of the American Academy of Dermatology, the American Contact Dermatitis Society, and  the American Medical Association.

Dr. Gallagher graduated Phi Beta Kappa and magna cum laude from Harvard University. Dr. Gallagher completed medical school and his internship at the University of California, San Francisco, where he received the UCSF-Reiner International Health Research Fellowship, and a fellowship from the American Medical Student Association for a research project in Kenya. While in medical school, he organized and led a medical outreach trip to the Bolivian Andes.

Dr. Gallagher then completed his dermatology residency at New York University (NYU), where he received extensive training in medical, surgical, pediatric and cosmetic dermatology.

After his residency, Dr. Gallagher was appointed Assistant Professor in the Department of Dermatology at NYU. His duties included training dermatology residents and serving as Director of the Residency Selection Committee. Additionally, Dr. Gallagher maintained a busy private practice with NYU’s Dermatology Faculty Practice. He also co-founded the only free clinic for uninsured patients in Manhattan and received university recognition for this contribution to community health.

Dr. Gallagher relocated to Colorado to co-found Boulder Valley Center for Dermatology. He has published work in peer-reviewed medical journals and a dermatology textbook. He has appeared on local radio and in the local press to speak about medical and cosmetic dermatology. In 2023, he was selected by Castle Connolly Top Doctors, featured in 5280’s Denver’s Top Doctors, August 2023 edition. He also serves as the dermatology contributor on the Medical Review Board of About.com and is a Medical Expert Board Member https://www.verywellhealth.com/casey-gallagher-md-4685028 for Very Well Health https://www.verywellhealth.com/.

Dr. Gallagher has served on the Board of Directors for many local organizations, including the Boulder Valley Independent Practice Association, the Boulder County Medical Society, and the Colorado Medical Society.

Dr. Gallagher has completed his board certification in MOHs surgery as established by the American Board of Dermatology and includes residency training in an accredited program and successful completion of the certifying examination.

Dr. Gallagher is married with two sons. He enjoys community service, hiking, running and playing bridge. He is fluent in Spanish.