Ronald J. Hauptman, M.D. Practices at the Following Locations. Phoenix - North, AZ. 3815 E Bell Rd, Ste 1250, Phoenix, AZ 85032. (602) 493-3030. Request an appointment at this location. Phoenix - North Mountain, AZ. 9250 N 3rd St, Ste 4035, Phoenix, AZ 85020. (602) 279-3575. Request an appointment at this location..