Make an Appointment: [email protected] | (303) 469-3182

  • banner image


    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. Drennan also serves as an Assistant Professor for Rocky Vista University Residents and Medical Students.