Health insurance giant Anthem, Inc. plans to submit applications to participate in the 2018 Obamacare exchanges, but could make alterations or ultimately decide to pull out if lawmakers don’t provide clarity on federal insurance payments and the health insurance tax, company executives said Wednesday.

Joe Swedish, Anthem’s CEO, said during the company’s first-quarter earnings call that if these items are not addressed then the company would re-evaluate its participation in June, which could lead to it requesting an increase in how much they charge for plans, exiting the exchanges or offering fewer plans. The company so far has remained in the Obamacare exchanges while other rivals like Aetna and UnitedHealthcare have fled.