Her areas of expertise include rheumatoid arthritis, vasculitis, and systemic lupus erythematosus (SLE). She is in-network for Anthem, Blue Cross/Blue Shield, Blue Shield, and more. Dr. McMahon studied medicine at the University of Chicago, Pritzker School of Medicine. For her residency, Dr. McMahon trained at Rush University Medical Center. Her professional affiliations include Resnick Neuropsychiatric Hospital at UCLA and Ronald Reagan UCLA Medical Center.