If an employer pays the premium on medical insurance and forces an employee to take that coverage is there anything the employee can do if they are covered under another plan?

Contact your human resource or personnel department people. If you have to self-pay for your health insurance coverage at your workplace you may be able to select not paying for it and decline the coverage. It depends on the insurance laws in your state and what is the policy at your workplace. If your employer pays for the insurance for you and you don't have to pay anything then why turn it down? Medical care is very expensive. And if you lose your job you may be able to continue that coverage until you have coverage from a new job.