ICD-10-CM > O00-O9A > O20-O29 > O26 > O26.8 > O26.89 O26.89 Other specified pregnancy related conditions Non-Billable/Non-Specific Use Additional code, if applicable, to identify specific condition such as insulin resistance (E88.81-) Codes O26.891Other specified pregnancy related conditions, first trimesterO26.892Other specified pregnancy related conditions, second trimesterO26.893Other specified pregnancy related conditions, third trimesterO26.899Other specified pregnancy related conditions, unspecified trimester