The invention provides a method for fabricating an implantable medical device to increase biocompatibility of the device, the method comprising: heat setting a polymer construct, wherein the polymer construct is at a temperature range of from about Tg to about 0.6(Tm&minusTg)+Tg such that the set polymer construct comprises a crystalline structure having crystals at a size less than about 2 microns and fabricating an implantable medical device from the heat set polymer construct.