Dr. Daniel Belen graduated the medical school from the Arizona College of Osteopathic Medicine and completed his residency program at the Botsford Hospital. A fellowship in pulmonary disease and critical care medicine at the Wayne State University School of Medicine followed soon after that. Dr. Belen is now specialized in pulmonology and is affiliated with various healthcare centers, including the Banner Thunderbird Medical Center. He has been practicing medicine for more than 11 years and during his career, he has also published one writing of medical interest in collaboration with other doctors.