A method for implanting an injection port within a patient. The method involves providing a port having a housing with a closed distal end, a open proximal end, a fluid reservoir therebetween, a needle penetrable septum attached to the housing about the opening, and at least one attachment mechanism mounted to the housing at a pivot point along an outer periphery of the housing. The attachment mechanism is an arcuate hook pivotable with respect to the housing, the arcuate hook having a length extending substantially at least 180.degree. about the pivot point. The method further involves placing the distal end of the port adjacent tissue, and rotating the arcuate hook at least 180 degrees so that a free end of the hook extends into tissue and back out again.