{"code":"T45.2","type":"code","title":"Poisoning by, adverse effect of and underdosing of vitamins","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":["poisoning by, adverse effect of and underdosing of nicotinic acid (derivatives) (T46.7)","poisoning by, adverse effect of and underdosing of iron (T45.4)","poisoning by, adverse effect of and underdosing of vitamin K (T45.7)","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":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"sibling_codes":["T45.2X","T45.2X1","T45.2X1A","T45.2X1D","T45.2X1S","T45.2X2","T45.2X2A","T45.2X2D","T45.2X2S","T45.2X3","T45.2X3A","T45.2X3D","T45.2X3S","T45.2X4","T45.2X4A","T45.2X4D","T45.2X4S","T45.2X5","T45.2X5A","T45.2X5D","T45.2X5S","T45.2X6","T45.2X6A","T45.2X6D","T45.2X6S"],"inclusionTerms":[],"sibling_titles":{"code":"T45.2X6S","title":"Underdosing of vitamins, sequela","isBillable":true},"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, adverse effect of and underdosing of vitamins is a non-billable ICD-10-CM category code (T45.2). A more specific billable subcode must be selected for claims submission. 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.","officialDefinition":"Poisoning by, adverse effect of and underdosing of vitamins is a non-billable ICD-10-CM category code (T45.2). A more specific billable subcode must be selected for claims submission. 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): poisoning by, adverse effect of and underdosing of nicotinic acid (derivatives) (T46.7); poisoning by, adverse effect of and underdosing of iron (T45.4); poisoning by, adverse effect of and underdosing of vitamin K (T45.7); 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 T45.","seventhCharacterInstructions":["The appropriate 7th character is to be added to each code from category T45"],"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":""}