November 15th is coming up and many seniors with Medicare supplement insurance believe that this is the time (November 15th - December 31st) they can change to another medicare supplement policy (medigap policy). This is true and false. True, you can look for and apply with another medicare supplement company between November 15th and December 31st. False, if you thought this was the only time of the year you can change Medicare supplements. Medicare supplement insurance can be changed at any point during the year although you may be subject to underwriting and not guaranteed issue. One of the easiest ways to shop for a new medigap policy is to request quotes online and let someone do the work for you. This way you can compare Medicare supplement plans and medicare supplement quotes from several different companies and decide which one is the best fit.