Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium (O98) ICD-10-CM

About the O98 Code Range

The ICD-10 code section O98 covers infectious and parasitic diseases that affect a mother specifically during pregnancy, childbirth, or the puerperium. These codes are used when infections like tuberculosis, syphilis, gonorrhea, viral hepatitis, HIV, and other sexually transmitted or parasitic diseases complicate the maternal condition during these critical periods.

This section provides detailed coding options that specify the infection type and the timing of complication—such as during the first, second, or third trimester of pregnancy, childbirth itself, or the postpartum period. For example, the code O98.019 identifies maternal tuberculosis during pregnancy, childbirth, and the puerperium, while O98.119 refers to maternal syphilis complicating the same. Codes like O98.519 address other viral diseases such as Zika virus or COVID-19 affecting pregnancy. The inclusion of synonymous terms like "venereal disease in pregnancy" or "protozoal disease complicating pregnancy" helps coders connect clinical documentation to the correct ICD-10 code. These codes enable accurate classification of infections that uniquely impact maternal health during and immediately after pregnancy, supporting targeted patient care and record-keeping.