Can an employer make you take health insurance if you already have insurance with your spouse?

If the company that you work for offers a health plan, but you need to pay for part of it. Then no, you do not have to sign up or pay for it. If your spouses plan is cheaper, which in most cases they are not, look into it. I find that companies that require their employees to share in the cost of their health care, do it anyways because it's cheaper than their spouses. One company I know has their employees pay 50% of the cost, but it's still cheaper than most spouses. Watch out if you smoke, you might be put it another bracket by yourself and other that smoke. THIS IS ILLEGAL.