What to do if an employee on workers’ comp stops paying for insurance?

Q: “We have an employee out on workers' compensation who has stopped paying his portion of his medical insurance. We emailed him a reminder but he has failed to respond and he is suing us for his case, since he was denied workers' compensation. I have not terminated him, but I would like to know if I can move his insurance to COBRA due to disability and non-payment?” – Kim, California