Our billing manager is asking me to look up several CPT codes as she is updating our office charge slips. One of our PCP does PAPs in the office, so she has asked for the CPT code to add it to the slip. I am having a difficult time finding a clear explanation of how to code this. I have found Q0091 for Medicare, but I am uncertain how to bill to commercial insurance. Is there a code to use or is a PAP included in E/M? When billing to commerical, is the only way to indicate that a PAP was done through ICD10 code? If that is the case, what is the appropriate ICD10 to use?