ICD-10-CM > O00-O9A > O20-O29 > O26 > O26.8 > O26.82 O26.82 Pregnancy related peripheral neuritis Non-Billable/Non-Specific Codes O26.821Pregnancy related peripheral neuritis, first trimesterO26.822Pregnancy related peripheral neuritis, second trimesterO26.823Pregnancy related peripheral neuritis, third trimesterO26.829Pregnancy related peripheral neuritis, unspecified trimester