There are certain conditions that are not included in your plans, called major exclusions. A major exclusion can refer to a condition that a plan will not cover for, such as:
Pre-existing illnesses, i.e. a condition for which you knew about before the start of the new medical coverage. Most plans have a waiting period in place for such pre-existing conditions
Cosmetic surgery/circumcision/corrective lenses/dental treatment unless necessitated by accidental injury It is best to refer to the policy contract for the full list of exclusions.