A coolable airfoil for a gas turbine engine includes a suction side wall that extends from a leading edge to a trailing edge. A pressure side wall is joined to the suction side wall at the leading edge and the trailing edge and spaced from the suction side wall to form a cavity therein that includes a cooling circuit with a plurality of serpentine cooling passages. A cooling air inlet passage receives cooling air from a plenum formed between an outer platform and an engine case and routes the received cooling air from the plenum to the cooling circuit. The coolable airfoil may also include a cooling air feed elbow that includes a metering input orifice that receives compressor first discharge air that provides the received compressor first discharge air to a feed elbow cavity and is redirected via a feed elbow outlet passage to the cooling circuit.