Dr. Brennan graduated from University of Michigan Medical School in 1989 and has been in practice for 29 years. She completed a residency at United States Army Medical Center. She currently practices at Hastings Surgeons PC and is affiliated with Pennock Hospital. Dr. Brennan accepts multiple insurance plans including Aetna, Blue Cross Blue Shield of Michigan and Medicare. Dr. Brennan also practices at Pennock Health Services in Hastings, MI.