If I haven't yet met my deductible?
From HealthCare.gov (emphasis added):
The amount you pay for covered health care services before your insurance plan starts to pay. With a $2,000 deductible, for example, you pay the first $2,000 of covered services yourself.
So expenses that are not covered by your health insurance do not get applied toward your deductible (or your out-of-pocket maximum).