At present, the list of medical expenses required for reimbursement is usually printed by computer, and the hospital will not change it for you!
If you can really apply, then you can pay for the surgery or treatment. Now on the list, only major items are written, such as the treatment fee-500. Surgery fee -200. It is not refined! So there is no need to consider what "root canal therapy" is.
It is best to pay for the surgery and treatment.