Dr. Ong Kee Yin commenced his practice in KPJ Ipoh Specialist Hospital in June 2008 as a Resident Consultant Physician and Endocrinologist. She was attached to Hospital Raja Permaisuri Bainun, Ipoh as a Medical Officer from 1998 to 2002 and Specialist Physician from 2002 to 2003. She has also served as Clinical Specialist in Endocrinologist at University Malaya Medical Centre. Dr. Ong was the Physician and Endocrinologist at Putrajaya Hospital in 2007 and later at Hospital Raja Permaisuri Bainun, Ipoh. She receivedBone Densitometry Certification from International Osteoporosis Foundation in 2007.