ICD-10-CM > O00-O9A > O20-O29 > O22 > O22.0 O22.0 Varicose veins of lower extremity in pregnancy Non-Billable/Non-Specific Applicable To Varicose veins NOS in pregnancy Codes O22.00Varicose veins of lower extremity in pregnancy, unspecified trimesterO22.01Varicose veins of lower extremity in pregnancy, first trimesterO22.02Varicose veins of lower extremity in pregnancy, second trimesterO22.03Varicose veins of lower extremity in pregnancy, third trimester