The United States District Court of the Eastern District of Texas on Wednesday issued a preliminary injunction prohibiting the Centers for Medicare and Medicaid Services (CMS) from implementing an interim rule that would seriously curtail the American Kidney Fund’s program for insurance premium assistance to dialysis patients.

In a joint lawsuit, dialysis providers, including Fresenius Medical Care, and the patient advocacy group Dialysis Patient Citizens have challenged the CMS’s interim rule on the grounds that it would disadvantage kidney failure patients compared with other patient groups.

The preliminary injunction follows the court’s granting of a temporary restraining order on January 12, 2017. The preliminary injunction is indefinite in duration and therefore will remain in effect as long as the court does not change it.