If i am covered by my parents' insurance, will the planned parenthood still be able to keep a visit a secret?

I want to start seeing a gyno/obgyn, but my mom seems weary against useless doctor's visits. I am covered under my dad's plan until im 25(im 20 now) and I do not want them thinking something crazy like im pregnant or something. However I do want to take the necessary precautions to pregnancy(if i become ually active) or want to prevent future problems.