Streptococcus B carrier state complicating pregnancy

This code signifies the presence of Group B Streptococcus (GBS) colonization in a pregnant patient, without active infection, which poses a risk for vertical transmission to the neonate. It indicates that the mother is a GBS carrier during her pregnancy.

Apply this code when documentation confirms a positive GBS screening test (e.g., vaginal and rectal swab culture) during pregnancy, indicating carrier status. This code is appropriate when the GBS colonization is noted as complicating the pregnancy, even in the absence of maternal symptoms.

• Do not use this code for active GBS infection in the mother; instead, code the specific infection (e.g., pyelonephritis due to GBS).
• This code is typically sequenced after the primary pregnancy code (e.g., O80 for uncomplicated delivery).
• Ensure documentation clearly states "carrier state" or "colonization" and its relationship to the pregnancy.