Does An Employee Have to Take Health Insurance?

I am interested to know if it is fraud for an employee that makes the schedules for our store to consistently make sure she has 40 hours with no insurance and some of us have 9 hours per week. I have some of the schedules that I can fax to you proving this. I have told our manager and he said we cannot force someone to have insurance. I believe that she is defrauding the government by deceit.