Welcome to Our Practice

Ronald M. Mann, M.D., Medical Director and Owner of Catalina Dermatology, has over two decades of experience as a fellowship trained Mohs surgeon and a dermatologist. Dr. Mann is certified by the American Board of Dermatology, with subspecialty certification in Micrographic Dermatologic Surgery.   Dr. Mann has been practicing in Tucson, Arizona since August 2003.

After graduating from the University of Pennsylvania School Of Medicine, Dr. Mann completed his internship at the Graduate Hospital of the University of Pennsylvania. He fulfilled a residency in dermatology at the University of Pittsburgh Medical Center and thereafter completed a fellowship in Mohs Surgery at the University of Louisville in Louisville, Kentucky.

In addition to being board certified, Dr. Mann is a fellow of the American College of Mohs Surgery, and a fellow of the American Academy of Dermatology.  He is a member of the Arizona Medical Association, American Society for Dermatologic Surgery, American Society for Laser Medicine and Surgery, American Contact Dermatitis Society, and Pima County Medical Society.

Dr. Mann established his private practice in 2004. He is married to Rebecca Mann, who is his practice manager. They have two grown daughters. Dr. Mann enjoys golf and traveling.

Although originally from the east coast, Louise landed out west and graduated from the MEDEX PA program at the University of Washington in 2018. She is certified by the NCCPA and completed the Diplomate Fellowship as a member of the Society of Dermatology Physician Assistants. Prior to joining Catalina Dermatology, Louise lived in Seattle and previously worked in family practice, followed by a shift into dermatology. She understands the frustrations that can arise with various skin concerns and finds great joy in guiding patients towards feeling confident about their skin.

Louise is brand new to Tucson and looking forward to less rain and more sunshine! She enjoys working out, implementing a healthy lifestyle, artistic pursuits, and continually learning about how she can best serve her patients.

Troy Gustaveson is a certified Physician Assistant who has been practicing since 2016. He grew up in Northern Arizona and started his professional career in engineering making medical devices. He quickly realized he would rather work directly with patients and returned to school to pursue a second career. Troy graduated with his master’s degree in physician assistant studies from Northern Arizona University in 2016. He then spent 6.5 years working in endocrinology before achieving his long-term goal of entering the field of dermatology. He is interested in all aspects of medical dermatology, particularly diagnosis and treatment of skin cancers. Outside of the office, Troy enjoys the company of his wife and spunky pup and spends his free time hiking and cooking.