Patient Resources. Insurances; No Surprises Act; Helpful Links; ... Page Content. Back to Locations Feldman ENT Division, The. Center Details. Address. 6410 Rockledge Drive Suite 305 Bethesda, MD 20817. Get directions Phone. 301-652-8847 . Visit Website Feldman ENT Division, The. 6410 Rockledge Drive, Suite 305, Bethesda, MD 20817. Hours of ....