Clinical trials may cover some of your cancer care costs. But you should ask for details before participating. Often, you still pay for costs related to standard treatment, such as routine doctor visits or hospital stays. These are usually already covered by your insurance. The trial may cover research costs. This includes the drug or intervention being tested, additional tests, and sometimes travel costs. Before you participate in a trial, you need to sign an informed consent document. This document explains the trial procedure and what costs are covered. If it’s unclear, ask questions until you have all the answers you need.