More than one in five adults in the U.S. live with a mental illness, but only about half receive treatment. Many struggle to find a therapist that will accept their insurance. An NPR/ProPublica investigation found that therapists, psychologists and psychiatrists who join insurance networks often leave because of challenges. Stephanie Sy discussed more with Annie Waldman of ProPublica. PBS News is supported by - https://www.pbs.org/newshour/about/funders