Wiki Allergy Diagnosis coding

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With allergy coding, the use of T codes-especially anaphylactic response is being used liberally whenever a patient is receiving follow up care such as cluster injections or Epipen refill, and the initial/only anaphylactic response was often times years ago- would it be appropriate to change to a "history of" Z code instead, or due to "actively" treating the allergy with maintenance allergy shots (95115,95117,95165), ingestion challenge (95076/95079), or rapid desensitization/cluster injections (95180), it would remain a T code with 7th character "A"- or should it be "D"? Example: T78.01XA/D or Z91.010 for peanut allergy that is not acutely treated at time of visit. Thank you!
 
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