An office is asking patients to pay for refractions and contact lens exams up front when they are seen. Patients are paying for it. Normally then we will the codes out and sometimes insurances do pay for it and patients end up with a credit. The doctor wants to know if we have to bill those codes to insurance that are being paid up front because then he doesn't have to deal with the credit and it makes his bookkeeping cleaner. Aren't we required to bill all the codes to insurance? Any feedback would be appreciated.