Dr. Janssen is the lead physician for Aspire Health in Southern California. Dr. Janssen graduated from Pomona College in 1996, Phi Beta Kappa. After working as an ambulance driver for a year, he attended UCLA Medical School. Dr. Janssen completed his residency at University of California Irvine in Emergency Medicine and was also Chief Resident and Resident Teacher of the year in 2005. Dr. Janssen also completed his fellowship in Hospice & Palliative Medicine at University of California Irvine. He is board certified in Emergency Medicine.