I have a patient that has been giving me grief since the day she was seen regarding what codes she wants us to bill for a visit regarding a contraception discussion with our physician. I billed the claim to what we did on the date of service. The patient has a $35.00 copay and wrote a lengthy letter (after telling me that I don't know how to bill) stating that her visit should've been covered at 100%. I tried to call her insurance to figure out what code to bill it with but it seems that I'm just going to have to send them the notes to let us know what we did wrong. I billed the claim with V25.04, we also could've billed it as V25.40. Neither of those DX were inaccurate but she wants us to bill a certain one for it to get paid at 100%. I can't find any sites that just spell out what codes to use and this woman is rude and disrespectful. Please help me.