ICD-10-CM > O00-O9A > O94-O9A > O98 > O98.5 > O98.51 O98.51 Other viral diseases complicating pregnancy Non-Billable/Non-Specific Codes O98.511Other viral diseases complicating pregnancy, first trimesterO98.512Other viral diseases complicating pregnancy, second trimesterO98.513Other viral diseases complicating pregnancy, third trimesterO98.519Other viral diseases complicating pregnancy, unspecified trimester