Learn more about Benjamin Mena, MD, ... Testimonials from patients of Dr. Mena. Excellent service 24/7!! from Joann in FL March 10, 2020 for Benjamin Mena, MD, FACP. I called Dr Mena during evening hours, after 8pm to be exact, I was having flu like symtoms & problems with heavy congestion & breathing to the point I felt I needed immediate ....