{"code":"T43.024D","type":"code","title":"Poisoning by tetracyclic antidepressants, undetermined, subsequent encounter","codeAlso":[],"includes":["adverse effect of correct substance properly administered","poisoning by overdose of substance","poisoning by wrong substance given or taken in error","underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed"],"modern_v":"official26","codeFirst":[", for adverse effects, the nature of the adverse effect, such as:","adverse effect NOS (T88.7)","aspirin gastritis (K29.-)","blood disorders (D56-D76)","contact dermatitis (L23-L25)","dermatitis due to substances taken internally (L27.-)","nephropathy (N14.0-N14.2)"],"excludes1":["toxic reaction to local anesthesia in pregnancy (O29.3-)"],"excludes2":["appetite depressants (T50.5-)","barbiturates (T42.3-)","benzodiazepines (T42.4-)","drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)","methaqualone (T42.6-)","psychodysleptics [hallucinogens] (T40.7-T40.9-)","abuse and dependence of psychoactive substances (F10-F19)","abuse of non-dependence-producing substances (F55.-)","immunodeficiency due to drugs (D84.821)","drug reaction and poisoning affecting newborn (P00-P96)","pathological drug intoxication (inebriation) (F10-F19)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["T43","T43.0","T43.011","T43.011A","T43.011D","T43.011S","T43.012","T43.012A","T43.012D","T43.012S","T43.013","T43.013A","T43.013D","T43.013S","T43.014","T43.014A","T43.014D","T43.014S","T43.015","T43.015A","T43.015D","T43.015S","T43.016","T43.016A","T43.016D","T43.016S","T43.021","T43.021A","T43.021D","T43.021S","T43.022","T43.022A","T43.022D","T43.022S","T43.023","T43.023A","T43.023D","T43.023S","T43.024","T43.024A","T43.024S","T43.025","T43.025A","T43.025D","T43.025S","T43.026","T43.026A","T43.026D","T43.026S","T43.1","T43.1X","T43.1X1","T43.1X1A","T43.1X1D","T43.1X1S","T43.1X2","T43.1X2A","T43.1X2D","T43.1X2S","T43.1X3","T43.1X3A","T43.1X3D","T43.1X3S","T43.1X4","T43.1X4A","T43.1X4D","T43.1X4S","T43.1X5","T43.1X5A","T43.1X5D","T43.1X5S","T43.1X6","T43.1X6A","T43.1X6D","T43.1X6S","T43.2","T43.201","T43.201A","T43.201D","T43.201S","T43.202","T43.202A","T43.202D","T43.202S","T43.203","T43.203A","T43.203D","T43.203S","T43.204","T43.204A","T43.204D","T43.204S","T43.205","T43.205A","T43.205D","T43.205S","T43.206"],"inclusionTerms":[],"sibling_titles":{"code":"T43.206","title":"Underdosing of unspecified antidepressants","isBillable":false},"useAdditionalCode":["code(s) to specify:","manifestations of poisoning","underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)","underdosing of medication regimen (Z91.12-, Z91.13-)"],"clinicalDefinition":"Poisoning by tetracyclic antidepressants, undetermined, subsequent encounter is a billable ICD-10-CM diagnosis code (T43.024D). Includes: adverse effect of correct substance properly administered; poisoning by overdose of substance; poisoning by wrong substance given or taken in error; underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed. Excludes1 (not coded here): toxic reaction to local anesthesia in pregnancy (O29.3-).","officialDefinition":"Poisoning by tetracyclic antidepressants, undetermined, subsequent encounter is a billable ICD-10-CM diagnosis code (T43.024D). Includes: adverse effect of correct substance properly administered; poisoning by overdose of substance; poisoning by wrong substance given or taken in error; underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed. Excludes1 (not coded here): toxic reaction to local anesthesia in pregnancy (O29.3-). Excludes2 (not included here): appetite depressants (T50.5-); barbiturates (T42.3-); benzodiazepines (T42.4-); drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-); methaqualone (T42.6-); psychodysleptics [hallucinogens] (T40.7-T40.9-); abuse and dependence of psychoactive substances (F10-F19); abuse of non-dependence-producing substances (F55.-); immunodeficiency due to drugs (D84.821); drug reaction and poisoning affecting newborn (P00-P96); pathological drug intoxication (inebriation) (F10-F19). Code first: , for adverse effects, the nature of the adverse effect, such as:; adverse effect NOS (T88.7); aspirin gastritis (K29.-); blood disorders (D56-D76); contact dermatitis (L23-L25); dermatitis due to substances taken internally (L27.-); nephropathy (N14.0-N14.2). Use additional code: code(s) to specify:; manifestations of poisoning; underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9); underdosing of medication regimen (Z91.12-, Z91.13-). 7th character: The appropriate 7th character is to be added to each code from category T43.","seventhCharacterInstructions":["The appropriate 7th character is to be added to each code from category T43"],"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":""}