Pei Mulroy - PIH Health

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Pei Lily Mulroy

Pei Lily Mulroy, DO

Dr. Pei Lily Mulroy began her career in healthcare as a registered nurse after receiving her Bachelors of Science in Nursing from the University of Southern California. She worked for four years at Alta Bates Summit Medical Center in Berkley, California as she completed her premedical studies at San Francisco State University. Dr. Mulroy received her medical degree in 2012 from Western University of Health Sciences in Pomona. She went on to complete her residency with the Family Medicine Residency Program at PIH Health Hospital - Downey, and was honored as Resident of the Year in 2014 and served as Chief Resident in her last year of residency. She firmly believes that the art of doctoring is not simply curing disease but being compassionate and caring to those who are often at their most vulnerable points in life. Alongside her husband, who is also a physician, Dr. Mulroy believes in the importance of practicing healthy habits as a family and hopes to lead their two young children by example. In her free time, Dr. Mulroy enjoys running, shopping, and entertaining at her home with family and friends.


11500 Brookshire Ave
Downey, California 90241
  • Main: 562.904.5000
  • Fax: 562.904.5309

Hospital/Group Affiliation

GME, PIH Health Downey Hospital

PIH Health Physicians





  • Hospitalist, Adult
  • Family Medicine


  • English



PIH Health Hospital-Downey


Western University of Health Sciences College of Osteopathic Medicine of The Pacific (California)


Family Medicine (General Cert)