In addition to English, he speaks Spanish. In his practice, he is particularly interested in preventive care, wellness programs, and sports health. Dr. Warning is affiliated with Crozer-Keystone Health System. He attended medical school at Thomas Jefferson University, Jefferson Medical College. Dr. Warning's residency was performed at Lancaster General Hospital. He takes United Healthcare Platinum, United Healthcare Navigate, and Coventry, in addition to other insurance carriers. Awards and/or distinctions Dr. Warning has received include past-president and current Board Chair Douglas Spotts; Advisory Council . "Top Docs" in Family Practice, Main Line Today; and "Top Doctors" in Family Medicine.