{"code":"O99.412","type":"code","title":"Diseases of the circulatory system complicating pregnancy, second trimester","codeAlso":[],"includes":["conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care"],"modern_v":"official26","codeFirst":[],"excludes1":["peripartum cardiomyopathy (O90.3)"],"excludes2":["hypertensive disorders (O10-O16)","obstetric embolism (O88.-)","venous complications and cerebrovenous sinus thrombosis in labor, childbirth and the puerperium (O87.-)","venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-)","when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":["code to identify specific condition"],"clinicalDefinition":"Diseases of the circulatory system complicating pregnancy, second trimester is a billable ICD-10-CM diagnosis code (O99.412). Includes: conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care. Excludes1 (not coded here): peripartum cardiomyopathy (O90.3). Excludes2 (not included here): hypertensive disorders (O10-O16); obstetric embolism (O88.","officialDefinition":"Diseases of the circulatory system complicating pregnancy, second trimester is a billable ICD-10-CM diagnosis code (O99.412). Includes: conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care. Excludes1 (not coded here): peripartum cardiomyopathy (O90.3). Excludes2 (not included here): hypertensive disorders (O10-O16); obstetric embolism (O88.-); venous complications and cerebrovenous sinus thrombosis in labor, childbirth and the puerperium (O87.-); venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-); when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36). Use additional code: code to identify specific condition.","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}