All our professionals 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.




Dr. Gallagher is board certified in dermatology. He is a fellow of the American Academy of Dermatology, the American Contact Dermatitis Society and a member of 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. He also serves as the dermatology contributor on the Medical Review Board of

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 ABD 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.





Dr. Hill is a board certified dermatologist, born and raised in Westminster, Colorado. She graduated magna cum laude from the University of Notre Dame with a degree in Accountancy and Latin. Dr. Hill then graduated from the University of Colorado School of Medicine with Alpha Omega Alpha honors. She completed an Internal Medicine internship at St. Joseph Hospital in Denver, where she received the “The Sam Ferszt Time Stands Still Award,” acknowledging her exceptional dedication to quality patient care.

Dr. Hill served as Chief Resident at the University of Colorado Dermatology Residency program, where she trained at the University of Colorado Hospital, Denver Health Hospital, Children’s Hospital Colorado, and Rocky Mountain Regional VA Medical Center. Dr. Hill also served as the resident leader of the DAWN Dermatology Clinic for the Underserved, a free clinic for the uninsured population of Aurora and Denver.

Dr. Hill is a member of the American Academy of Dermatology, Colorado Dermatologic Society, and Women’s Dermatologic Society. She has published multiple peer-reviewed medical articles, and presented at various national and local conferences, including the American Academy of Dermatology and Colorado Dermatologic Society annual meetings.

Dr. Hill is thrilled to be a part of the Boulder Valley Center for Dermatology team of providers. She is a thoughtful, compassionate physician who truly values developing life-long relationships with her patients. Dr. Hill continually strives to provide the highest level of medical care, and is committed to staying up to date on new evidence-based treatments.

Dr. Hill is married with a daughter. She and her husband are very happy to be in Colorado with their families. In her free time, Dr. Hill enjoys spending time with her family and dog, hiking, biking, snowshoeing, and any other activity involving the great Colorado outdoors.




Ryan previously served on the BV Derm team as a Medical Assistant, and he has rejoined our practice as a Physician Assistant. Ryan graduated from the University of Colorado with a BA in integrative physiology. He earned a Master of Physician Assistant Studies (MPAS) from Marquette University’s Physician Assistant Program in Milwaukee, Wisconsin. Ryan shares our values of patient-centered care in all aspects of our medical practice. We are delighted to have him here and we know you will appreciate the care he brings.




Zoey is a graduate of the University of Colorado’s School of Medicine, where she received her Master of Physician Assistant Studies. Her undergraduate degree is from the University of Virginia, where she majored in biology, with a minor in bioethics. Zoey worked at a dermatology practice in Virginia following graduation. Zoey grew up living in Guatemala and El Salvador with her family, and she is a fluent Spanish speaker. Zoey loves Colorado and is excited to expand her professional career here at BV Derm.




Brooke graduated from the University of Colorado with a Master's in Physician Assistant Studies. She is a certified Physician Assistant by the State of Colorado and the National Council for the Certification of Physician Assistants. Brooke grew up in Wilmington, NC and attended Davidson College, where she majored in Spanish. Brooke also earned a Master's degree in Spanish from University of Colorado at Boulder and is a fluent Spanish speaker. Brooke is married with two sons and loves to spend time outdoors with her family hiking, skiing and biking. She also enjoys cooking, reading and playing soccer. Brooke is excited for the opportunity to expand her professional career as a Physician Assistant at Boulder Valley Center for Dermatology, helping patients care for their skin in our beautiful, high altitude Colorado climate.


Alanna Thomas, PA-C, MS

Physician Assistant

Alanna is a graduate from Georgia-Philadelphia College of Osteopathic Medical School where
she received her Master’s of Science Degree in Physician Assistant Studies. Her undergraduate
degree is from Quincy University where she majored in biology and minored in chemistry.
Alanna has previously worked in hematology and oncology at practices in Georgia and
Colorado. Alanna grew up living in Illinois and is married and has a dog. She enjoys Colorado
and likes to hike, ski, and play pickleball. Alanna is excited to expand her professional career at
Boulder Valley Center for Dermatology

trev Trevor Fleischmann, PA

PHYSICIAN ASSISTANT Trevor is a graduate from Springfield College where he received his undergraduate degree in Sports Biology with a minor in chemistry and ultimately his Master’s of Science Degree in Physician Assistant Studies. He has previously worked as a nocturnist physician assistant in Connecticut. Trevor grew up living in Connecticut but is excited for a new adventure and career in Colorado. He likes to hike, bike, snowboard, fish and spend quality time with family. Trevor is excited to expand his professional career at Boulder Valley Center for Dermatology



Cosmetic Supervisor Laser Certified Aesthetician

Elena’s past leadership roles throughout her 20-year work history have well prepared Elena for the current Cosmetic Supervisor position. Elena prides herself in being a true leader and helping her team learn and grow. Taking care of patients and working with them on their skincare journey is important to Elena. She tailors patient treatment plans based off patient’s skin concerns, lifestyle, compliance and budget. Elena is a Denver native and knows how the high-altitude and weather changes can affect one’s skin from personal knowledge. She also has ethnic skin and knows how darker skin types can be more sensitive and treated more cautiously. She is very comfortable working with all skin types. Elena continuously furthers her professional expertise and job knowledge through continuing education and staying in the know with aesthetic technology. Elena then passes her knowledge onto her patients so they are well informed and affianced throughout their entire process. Elena enjoys doing skincare procedures and using professional/medical grade products on herself so she can speak from a personal standpoint. Elena takes pride in caring for her skin and tending to her overall health and appearance. She leads by example for all!

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