Dr. David Lyu is a Illinois state licensed medical doctor, specializing in Internal Medicine. Graduated Magna Cum Laude from Taiwan, completed residency training in MercyHealth, Dr. Lyu currently is working at MercyHealth, located in 415-A Congress Parkway Crystal Lake IL 60014 Please call +1-815-356-7494 to contact. Access cdoc101.com on a desktop computer to view more details. | |||