{"code":"O10.91","type":"code","title":"Unspecified pre-existing hypertension complicating pregnancy","codeAlso":[],"includes":["pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium"],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":["pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"sibling_codes":["O10.911","O10.912","O10.913","O10.919"],"inclusionTerms":[],"sibling_titles":{"code":"O10.919","title":"Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Unspecified pre-existing hypertension complicating pregnancy is a non-billable ICD-10-CM category code (O10.91). A more specific billable subcode must be selected for claims submission. Includes: pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium. Excludes2 (not included here): pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-).","officialDefinition":"Unspecified pre-existing hypertension complicating pregnancy is a non-billable ICD-10-CM category code (O10.91). A more specific billable subcode must be selected for claims submission. Includes: pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium. Excludes2 (not included here): pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-).","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":""}