Our Staff

Prescott Ear, Nose, Throat & Allergy is made up of a team of professionals dedicated to providing the best quality healthcare in a responsive and caring environment. Our otolaryngologists are Board certified with decades of experience in the profession. They work in concert with nurses and office staff who try to understand your health issues and concerns.

Mark D. Strasser MD, FAAOA

Dr. Strasser grew up in Prescott, attended Prescott High School and then the University of Arizona (B.S. Magna Cum Laude, Phi Beta Kappa 1991).  He graduated with honors from both the U of A medical school (MD, Alpha Omega Alpha 1995), and then the University of Cincinnati/Childrens' Hospital of Cincinnati Otolaryngology/Head and Neck Surgery residency (Peerless Award for top chief resident).  After working at the University of Otago in New Zealand, he returned to Prescott in 2001 to join Dr. Michael Strasser and Dr. Berry at Prescott ENT and Allergy.  Dr. Strasser is Board Certified in Otolaryngology/Head and Neck Surgery (ABO to 2001) and has advanced allergy training as a Fellow of the American Academy Otolaryngic Allergy (FAAOA, 2008).  Dr. Strasser and his wife Stephanie enjoy spending time with their twins Sam and Ava and all things outdoors. 


Derek K. Hewitt MD, MPH

Dr. Hewitt grew up in the great Northwest. After completing a 2 year mission for his church, he started college; receiving a BA in English from Brigham Young University and also a BS in Biology from the University of Utah. It was at BYU, while studying Russian, that he met his beautiful wife, Carrie. They moved to Salt Lake City, where he studied Public Health, earning a Masters degree before entering medical school at the UofU. His wife was integral in helping him through medical school. They started a family in Salt Lake and managed apartments during medical school. Dr. Hewitt then entered residency in Otolaryngology at the University of Missouri in Columbia. He finished a 1 year internship in General Surgery, followed by 4 years of training in Otolaryngology - Head and Neck Surgery. After residency, he was excited to accept a position in Spokane Washington with Spokane ENT. While there he volunteered on the Cleft Palate Board, participating in the care of young patients with ENT issues related to cleft palates. After 3 short years in Spokane, he saw an opportunity to expand his practice and contribute to the growing Quad City area in Yavapai County. The Hewitt's moved to Prescott in late 2011 and have been enjoying the area since. Dr. Hewitt relishes the opportunity to constantly update and improve the care of Otolaryngology in central Arizona. While providing a wide spectrum of general ENT care from pediatrics, ear disease, sinus disease and trauma, he is particularly focused on the appropriate diagnosis and treatment of thyroid nodules, as well as updating the care of allergic disease. 

Lest you think all Dr. Hewitt does is study and work, he also enjoys spending time with his family and serving in various capacities with his church. He is discovering the San Juan Mountains of Southern Colorado via backpacking; and still trying to get up consistently on a surf board in Southern California. Locally, he enjoys time in the gym at the YMCA, as well as biking and hiking the Sierra Prietas, the Bradshaws and the San Fransisco Peaks. 

Dr. Hewitt belongs to several professional organizations to help stay abreast of the constant changes in medicine. Following is a list of these professional societies:

American Board of Otolaryngology - Fellow
American Academy of Otolaryngology-Head & Neck Surgery
American Thyroid Association
American Academy of Otolaryngic Allergy


David Holmes, Au.D.

Dr. David Holmes has been associated with Prescott Ear, Nose and Throat for over 30 years.  Originally from Southwest Iowa, he received his undergraduate degree from Northwest Missouri State University.  He received his Master’s degree from Wichita State University and his Doctoral degree from the University of Florida’s Department of Audiology.  Professional Organizations include American Academy of Audiology, Academy of Doctors of Audiology, and American Speech, Language, and Hearing Association.  He is married to wife Danette.  They have a daughter Kassy and with their golden retriever Goldy, can be seen around the neighborhoods of Prescott Lakes for frequent walks.  David enjoys golf, road biking, hiking, skiing and watching whatever sport is in season.