Supplemental Medigap Plans in Colorado, supplement Original Medicare. In most cases Original Medicare only covers %80 of your Medical Expenses, this is where having a Medigap Plan to cover those out of pocket expenses can make a big difference. Supplemental Medigap Plans are regulated by Medicare, and are the same from company to company. So finding the right plan is as easy as comparing prices. For more information, please enjoy the video, or call 1-800-MEDIGAP to talk to a leading professional who can answer any questions and provide free quotes.