He was also an early leader in the development of Emergency Medical Services in California. He was the Director of the Paramedic Training Institute for Los Angeles County for six years, the largest training program in the country. During that time he helped develop training, certification and re-certification standards for paramedics and he served as the senior medical person in the LA Local EMS Agency. He also established working relationships with the LA Affiliate of the American Heart Association and the LA Pediatric Society to develop and publish the first prehospital care standards in these respective fields. As Chairman of the newly established California State Commission on Emergency Medical Services, he had enormous impact on the evolution of State policies and standards.
Dr. Crowell was a practicing emergency physician. In addition to undertaking the activities noted above, he headed a group of physicians that contracted with hospitals to provide emergency services. He was board certified in Emergency Medicine from the time they were first offered (1980) and continues to be certified despite retiring from Emergency Medicine in 1998. Since 1987, Dr. Crowell has owned and operated HealthFirst Medical Group, a large occupational medicine (Workers Compensation) practice, with two offices in Santa Fe Springs, CA. He established one of the first electronic medical records for a Workers Compensation practice, and HealthFirst has been considered as one of the best practices in California.
Dr. Crowell founded an emergency medicine symposium in 1975 held every January in Yosemite National Park. He continues to oversee this unique event.