WASHINGTON — IN the last few days of negotiations in Congress, repeal of the Affordable Care Act’s tax on medical devices emerged as a key Republican demand. The medical-device industry waged an intense lobbying campaign — even garnering the support of many Democrats who favored the law — arguing that the tax would stifle innovation and increase health care costs.

This argument is doubly disingenuous. Not only can the medical-device industry easily afford the tax without compromising innovation, but the industry’s enormous profits are a result of anticompetitive practices that themselves drive up medical-device costs unnecessarily. The tax is a distraction from reforms to the industry that are urgently needed to lower health care costs.

The medical-device industry faces virtually no price competition. Because of confidentiality agreements that manufacturers require hospitals to sign, the prices of the devices are cloaked in secrecy. This lack of transparency impedes hospitals from sharing price information and thus knowing whether they are getting a good deal.

Even worse, manufacturers often maintain personal relationships (sometimes involving financial payments like consulting fees) with physicians who choose the medical devices that their hospitals purchase, creating a conflict of interest. Physicians often don’t even know the costs of the devices, and individual physicians often choose devices on their own, which weakens a hospital’s ability to bargain for volume discounts.