What are ancillary benefits? Ancillary benefits, also called supplemental benefits, are benefits that are not part of your core health insurance. In other words, these benefits aren’t generally part of your main health insurance. They are offered in addition to that coverage. Benefits that fall into the ancillary category typically include: Dental Insurance. This benefit helps to cover the cost of visiting the dentist for basic or preventive services such as teeth cleaning, x-rays, and fillings. Vision Insurance. This benefit helps to cover the cost of vision care including eye exams, eyeglasses, contacts, [...]