Can I add UM (uninsured motorist) coverage without having BI (bodily injury)?

I was gonna add UM coverage to my current insurance policy which has PD(Property Damage) PIP( Personal Injury Protection) and Collision coverage but I was told that I have to have BI (Bodily Injury) Liability in order to be able to add up UM Non-Stacked(because I have only one car on the policy) So please help me figure it out!