{"code":"O91.211","type":"code","title":"Nonpurulent mastitis associated with pregnancy, first trimester","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":["mental and behavioral disorders associated with the puerperium (F53.-)","obstetrical tetanus (A34)","puerperal osteomalacia (M83.0)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":["code to identify infection"],"clinicalDefinition":"Nonpurulent mastitis associated with pregnancy, first trimester is a billable ICD-10-CM diagnosis code (O91.211). Excludes2 (not included here): mental and behavioral disorders associated with the puerperium (F53.-); obstetrical tetanus (A34); puerperal osteomalacia (M83.0). Use additional code: code to identify infection.","officialDefinition":"Nonpurulent mastitis associated with pregnancy, first trimester is a billable ICD-10-CM diagnosis code (O91.211). Excludes2 (not included here): mental and behavioral disorders associated with the puerperium (F53.-); obstetrical tetanus (A34); puerperal osteomalacia (M83.0). Use additional code: code to identify infection.","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":""}