What is the difference between D9910 and D9911? Is there any supporting documentation typically required for submitting either code?

The doctor used D9911 and my insurance Cigna doesn't cover, I've to pay $1000. I was even not aware that insurance doesn't cover it.

I'm wondering if the doctor can use D9910 instead which is covered by insurance.

D9910 is used on a per visit basis for application of topical fluoride. Documentation should support this code prior to usage. It should be noted that the patient is having issues with root sensitivity.

D9911 is used on a per visit basis for application of ashesive resins. Supporting documentation should be noted in the chart prior to submitting this code for reimbursement. It should be noted the patient is having root or cervical sensitivity on a tooth with a resin based filling.

Documentation is ALWAYS required when submitting either code.