She graduated with honors in 1996. Having more than 21 years of diverse experiences, especially in NURSE PRACTITIONER, Maria E Johnston affiliates with St. Mary's Hospital, and cooperates with other doctors and specialists in many medical groups including St Elizabeths Health Center Inc, Tucson Physician Group Holdings LLC. Call Maria E Johnston on phone number (520) 746-5001 for more information and advises or to book an appointment.