As the cost of healthcare skyrockets, plans change more often than ever. During the enrollment period, typically november or december, is a time when you sign up for the following year's health plan. Hopefully, you'll get a summary of the benefit changes for the year, and I highly recommend you actually read it carefully, because the fine print can change considerably. It's easy and a fallacy to assume that if your health and family situation is expected to stay the same, that you should just leave everything the same with your health plan.