cabinjohn-ms.mcpsmd.org/ 10701 Gainsborough Road Potomac, MD 20854 39.031128 -77.172636 Cabin John MS10701 Gainsborough RoadPotomac,MD 20854 Phone: 240-406-1600 Fax: 240-740-4403 Counseling Office: 240-406-1560 Health Room: 240-406-1570 Ms. Somer Snider, Principal Staff Directory