ICD-10-CM > O00-O9A > O20-O29 > O26 > O26.8 > O26.83 O26.83 Pregnancy related renal disease Non-Billable/Non-Specific Use Additional code to identify the specific disorder Codes O26.831Pregnancy related renal disease, first trimesterO26.832Pregnancy related renal disease, second trimesterO26.833Pregnancy related renal disease, third trimesterO26.839Pregnancy related renal disease, unspecified trimester