{"code":"T20.519S","type":"code","title":"Corrosion of first degree of unspecified ear [any part, except ear drum], sequela","codeAlso":[],"includes":["burns and corrosions of first degree [erythema]","burns and corrosions of second degree [blisters][epidermal loss]","burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]"],"modern_v":"official26","codeFirst":["(T51-T65) to identify chemical and intent"],"excludes1":[],"excludes2":["corrosion of ear drum (T28.91-)","burn and corrosion of ear drum (T28.41, T28.91)","burn and corrosion of eye and adnexa (T26.-)","burn and corrosion of mouth and pharynx (T28.0)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":["external cause code to identify place (Y92)","code from category T31 or T32 to identify extent of body surface involved"],"clinicalDefinition":"Corrosion of first degree of unspecified ear [any part, except ear drum], sequela is a billable ICD-10-CM diagnosis code (T20.519S). Includes: burns and corrosions of first degree [erythema]; burns and corrosions of second degree [blisters][epidermal loss]; burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]. Excludes2 (not included here): corrosion of ear drum (T28.91-); burn and corrosion of ear drum (T28.41, T28.","officialDefinition":"Corrosion of first degree of unspecified ear [any part, except ear drum], sequela is a billable ICD-10-CM diagnosis code (T20.519S). Includes: burns and corrosions of first degree [erythema]; burns and corrosions of second degree [blisters][epidermal loss]; burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]. Excludes2 (not included here): corrosion of ear drum (T28.91-); burn and corrosion of ear drum (T28.41, T28.91); burn and corrosion of eye and adnexa (T26.-); burn and corrosion of mouth and pharynx (T28.0). Code first: (T51-T65) to identify chemical and intent. Use additional code: external cause code to identify place (Y92); code from category T31 or T32 to identify extent of body surface involved. 7th character: The appropriate 7th character is to be added to each code from category T20.","seventhCharacterInstructions":["The appropriate 7th character is to be added to each code from category T20"],"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":"","noteProvenance":{"burn and corrosion of ear drum (T28.41, T28.91)":"T20","burn and corrosion of eye and adnexa (T26.-)":"T20","burn and corrosion of mouth and pharynx (T28.0)":"T20","code from category T31 or T32 to identify extent of body surface involved":"T20","burns and corrosions of first degree [erythema]":"T20","burns and corrosions of second degree [blisters][epidermal loss]":"T20","burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]":"T20","(T51-T65) to identify chemical and intent":"T20.5","external cause code to identify place (Y92)":"T20.5","corrosion of ear drum (T28.91-)":"T20.51"},"hcc":{"mapped":false,"model":"CMS-HCC V28","paymentYear":"2026","categories":[],"otherModels":[]}}