Alright, I work for an optometrist and we refer patients to an ophthalmologist to have cataract surgery. After the surgery they come back to us for a 1day Post Op (we have a transfer of care) we bill the same codes as the surgeon with a modifier 55 and RT or LT. My question is, should we be charging a copayment, coinsurance or deductible for their 1 day Post Op visit after cataract surgery? We have not been charging the patients because insurance always pays and the surgeons office informed us we should not charge the patient and as far as I was concerned we should not charge the patient anything during their global period. I recently received an EOB from a Aetna Medicare plan that only paid part of the visit and also had a copayment towards the patient. Do I charge the patient that copayment since the EOB says to or is that incorrect?