Dr. Drennan is a board-certified anesthesiologist with fellowship training and board certification in chronic pain management. Since completing his fellowship as a pain specialist, Dr. Drennan had been fortunate enough to establish a strong and growing chronic pain practice at the University of Utah. In addition to teaching residents and fellows at the University of Utah, Dr. Drennan also provided lectures to outside interest groups such as the Cancer Wellness House associated with Salt Lake Regional hospital, and the physical therapy school at the University of Utah. Additionally, he served as an editor for a pain management education course, a consultant for Oxford University Press, and an advisor for the Controlled Substances Task Force of the Utah Medical Association.

As for research, Dr. Drennan participated in a multi-center spinal cord stimulator trial for St. Jude Medical. He published a few short review papers for the Journal of Pain and Palliative Care Pharmacotherapy, and a systematic review of literature pertaining to topical NSAID therapy. Additionally, he was the primary investigator for a placebo-controlled randomized trial of vitamin D3 replacement in patients with chronic musculoskeletal pain.

After nearly three years at the University of Utah, Dr. Drennan reached his maximum capacity to see patients at that clinic, and he felt that starting Comprehensive Pain Specialists would allow him to deliver high quality pain management to more patients. He now resides and practices medicine in Colorado, serving the Boulder, Fort Collins, and Denver metro areas.

Dr. Eric Mehlberg is a board certified anesthesiologist specializing in pain medicine. He completed his anesthesia residency at Stanford University Medical Center in Stanford, CA after completing medical school from the University of Illinois.  Dr. Mehlberg then completed his pain medicine fellowship at the University of California – San Francisco. Dr. Mehlberg was one of two students awarded as a Phi Alpha Chi Honor Society Member for graduating in the top five percent of class.  He was also awarded a Dean’s Scholarship for academic excellence. 
Dr. Andrew Wendahl is an anesthesiologist, fellowship trained in pain management. He completed a surgical internship at St. Joseph Hospital, Denver, CO after finishing medical school at Rocky Vista University College of Osteopathic Medicine in Parker, CO. He then went on to complete an anesthesia residency at UW in Madison, WI. Dr. Wendahl completed a Pain Medicine fellowship at the University of Utah following graduation from residency. Dr. Wendahl has been extensively involved in pain management education throughout training, writing numerous scholarly book chapters and presenting at regional and national society meetings. He has been recognized and awarded for both his academic and clinical excellence. Dr. Wendahl’s interest is in providing comprehensive pain care using multiple modalities in order to help patients achieve a functional and fulfilling life. Outside of work, Dr. Wendahl enjoys spending time with his family and everything outdoors including biking, skiing and fishing.
Sarah graduated with her Masters of Physician Assistant Studies from Sacred Heart University in Stamford, CT in 2018 and is board certified by the National Commission on Certification of Physician Assistants. During her time in physician assistant school, Sarah was selected as a Physician Assistant Education Association Health Policy Fellow where she represented the physician assistant profession at the national level. Prior to becoming a PA, Sarah graduated from American University in Washington, D.C. in 2012 with a Bachelor of Arts degree in Political Science and worked for an U.S. Senator for several years. While she enjoyed her previous career in politics, she has found her true calling in medicine and has a keen interest in helping those in pain. She has previous experience in orthopaedics and rehabilitation. Sarah is originally from Centennial and enjoys spending time outdoors with her friends, family and chocolate labrador, Rosie.

Joshua has four years of experience as a physician assistant. He has a Bachelor of Science degree in Biological Chemistry from the Kent State University in 2009 and completed his Master of Health Science degree in Physician Assistant Studies at Cleveland State University in 2013. He has worked in the Orthopedic Department with sports medicine and total joint surgery for three years before transferring to pain management. In his free time, Josh enjoys spending time with his wife, hiking and photography.

Kristen has eight years of experience as a physician assistant. She is an East Coast native, earning her Bachelor of Science degree in Exercise Science from the University of Delaware in 2007. Kristen completed her Master of Medical Science degree in Physician Assistant Studies at Nova Southeastern University in Fort Lauderdale, Florida in 2009. She has worked in adult spine surgery for the Orthopaedic Department at the Johns Hopkins Hospital in Baltimore, Maryland and total joint surgery for Colorado Orthopaedics in Lone Tree, Colorado. She also spent four years working in adult phlebology at the Albert Vein Institute in Lone Tree and Colorado Springs. Her background and experience has paved the way for a smooth transition into Pain Management. Outside of the office Kristen can be found competing and participating in local CrossFit events and out and about with her family exploring all that beautiful Colorado has to offer.

Education: Bachelors of Science – Exercise Science – Eastern Washington University (2008) Doctorate of Physical Therapy – A.T. Still University (2011)
Josh is a physical therapist who loves working to get people moving again! He is certified in integrative dry needling, and utilizes many “outside of the box” treatments to get people feeling better quickly. He loves using hands-on techniques, followed by customized exercises to help maintain great results. Josh has worked at clinics where he had to juggle multiple patients at once, so he loves taking a lot of one-on-one time with each patient he works with. Having undergone a few big injuries himself, he realizes how frustrating it feel to be limited physically, and will do everything possible to speed the healing process. When not at work you can usually find him outside trail running, rock climbing, biking, skiing, or just relaxing with his wife and 2 rescue dogs, usually drinking a strong cup of coffee.