He is affiliated with Saint Barnabas Medical Center. After completing medical school at UMDNJ-New Jersey Medical School, Dr. Gruenwald performed his residency at Children's National Medical Center. He is rated highly by his patients. He is an in-network provider for Amerigroup, Blue Cross/Blue Shield, and Coventry, as well as other insurance carriers. He has received the following distinction: Millburn-Short Hills Super Doctors.