He is especially interested in esophageal surgery, pectus excavatum, and endoscopic surgery. Dr. Petrosyan is an in-network provider for Medicaid and Medicare insurance. He obtained his medical school training at Rosalind Franklin University of Medicine and Science, Chicago Medical School and performed his residency at Los Angeles County+USC Medical Center. Dr. Petrosyan (or staff) speaks Spanish, Armenian, and Russian. His professional affiliations include Holy Cross Hospital, Children's National Health System, and Holy Cross Health (Maryland). New patients are welcome to contact his office for an appointment.