Dr. John William Frey, MD

Dr. John Frey is a physician specializing in pulmonology, critical care medicine, and internal medicine. He holds an MD degree and focuses on treating respiratory conditions and providing intensive care for critically ill patients. His expertise spans from routine lung function assessments to complex respiratory disorders requiring specialized intervention.

Dr. Frey practices at multiple locations including La Crosse and Rochester through Mayo Clinic Health System and Gundersen Lutheran Medical Center. He treats patients with sleep apnea and obstructive sleep apnea, including pediatric cases. His clinical services include pulmonary function testing to evaluate lung health and bronchodilator reversibility testing to assess breathing improvements. He also provides therapeutic hypothermia treatment for patients requiring specialized temperature management during critical care.