An apparatus for coating medical devices at the point of care with a polymer and/or therapeutic agent comprising an environmentally controlled device coating chamber in which the device may be delivered by the manufacturer as the device packaging, or the device may be placed into the chamber at the point of care. The environmentally controlled chamber can provide a sterile enclosure in which the polymer and/or a therapeutic agent can be applied to an uncoated or previously coated device and converted to another form (such as a liquid to a film or gel) if desired, under controlled and reproducible conditions. The environmentally controlled chamber can accommodate and provide for coating the device by immersion, spray and other methods of covering the device surface with a liquid or powder. The chamber can provide for energy sources, both internally, such as heat produced by film heaters, and externally, such as UV light or microwave passing through the enclosure. The chamber may allow for changes in atmosphere to affect the coating, such as the introduction of certain gases and introducing pressure or vacuum.