ICD-10-CM > O00-O9A > O94-O9A > O98 > O98.1 > O98.11 O98.11 Syphilis complicating pregnancy Non-Billable/Non-Specific Codes O98.111Syphilis complicating pregnancy, first trimesterO98.112Syphilis complicating pregnancy, second trimesterO98.113Syphilis complicating pregnancy, third trimesterO98.119Syphilis complicating pregnancy, unspecified trimester