Why are some payors noting B codes ,without instructional notes advising that an additional organism code as required , as never being able to be used as a primary dx for procedure? While it is true some unspecified codes in the B95-B97 series may require additional codes to identify infectious agents . There are some B codes in that range (B96.1 for example) which do not have any restrictions related to being primary and have the highest specificity based on bacteria being indicated on code itself in green font as a code descriptor. Therefore, not certain why it is being denied as not being able to be primary? What am I missing? Thank you