Without key information, you will have too many potential codes. Drastic changes are coming for inpatient coders, and the way providers currently document procedures will become incomplete in 2014. Check out this carotid bypass scenario and find out what you need to know for accurate ICD-10-PCS claims. Scenario: However, you cannot report this procedure -- as stated -- in ICD-PCS. What's missing? You don't know the approach (open, percutaneous, or percutaneous endoscopic) and device (drug-eluting intraluminal device, intraluminal device, or no device). Here are the potential codes you can use: