In Fedor v. United Healthcare, No. 19-2066 (10th Cir. 2020), the U.S. Court of Appeals for the Tenth Circuit has clarified the outer limits of the severability doctrine that the Supreme Court has developed to limit challenges to the validity of arbitration awards to situations where a party is able to challenge the arbitration clause itself without bringing in the validity of the agreement as a whole. As the court held in Prima Paint v. Flood & Conklin Mfg., 388 U.S. 395 (1967), if the arbitration clause is valid, the dispute must be sent to arbitration. The Court of Appeals' opinion in Fedor makes clear that that the severability doctrine does not come into play unless there is an underlying arbitration agreement, and whether such an agreement has been formed is for the arbitrator to decide. In other words, contract formation issues are for the court, not the arbitrator; severability is a channeling provision—channeling aspects of the parties' dispute to arbitration—that assumes and only kicks in if there is underlying arbitration agreement.