Massachusetts General Hospital is located at 131 Old Road To 9 Acre Cor, Concord, MA. This business specializes in Hospitals & Medical Centers. Massachusetts General Hospital is open Mon, 9am-5pm ; Tue, 9am-5pm ; Wed, 9am-5pm ; Thu, 9am-5pm ; Fri, 9am-5pm ; Sat, Closed ; Sun, Closed. and accepts American Express, Cash, Discover, Mastercard and Visa.