McGrath was recruited back to the School of Nursing at UCSF in 2012 to start the nation’s first diabetes concentration with clinical opportunities for advanced practice nurses. She has been practicing for over 25 years as a pediatric diabetes specialist; Emory (10 years) and UCSF (15 years). A graduate of the UCSF School of Nursing Advanced Practice Pediatric Nurse program (1995), the first nurse “Dorothy Frank Diabetes Fellow”, and a crucial team member in starting UCSF’s first pediatric diabetes clinic now celebrating its 25th anniversary. She was well positioned to start UCSF's Diabetes Concentration and developed three courses: Behavioral Approaches to Diabetes Across the Lifespan, Advanced Management of Pediatric Diabetes course, and Advanced Management of Adult Diabetes course. In June 2022 over 140 APN students will have completed the diabetes concentration. She lectures in Core Courses, MEPN, and specialty programs. In June 2018, McGrath launched a 30 unit fully online diabetes certificate for working healthcare professionals. (see link below). In Spring 2022, McGrath has added a 10 unit online Pediatric Diabetes course to the 30 unit existing course which is operated through the UCSF Office of Continuing Medical Education.

She has an appointment in the UCSF School of Medicine and the School of Nursing and a Faculty Practice at the UCSF Benioff Children's Hospitals. She is a member of the clinic leadership team and precepts FNP and PNP students. For the past 35 years she has served in various roles in diabetes camps in California and Georgia. She currently serves as the Medical Director of Campamento Familiar en Español– a family camp for Spanish speakers- and a summer residential teen camp. While at teen camp, she precepts graduate nursing, medical, and pharmacy students. (see link below).