I am having trouble with my place of service code for IV antibiotic therapy. We are a physician office with an infusion suite and pharmacy. Most of our patients are able to take their medications home and administer themselves. We have been billing place of service 11 but sometimes are running into trouble with the patient being given a copay for every day they are taking the medication. I am weary of coding place of service 12 because we are not a home health agency. I am also not sure about using place of service 1 because we are not a free standing pharmacy. The medication is mixed here in the office and that has been the rationale behind choosing this place of service code. Most claims are paid fine but some are kicking out a copay. I am really getting frustrated with this. Any advise on this matter will be greatly appreciated if anyone has any experience with this.