T78.40

Non-Billable

Allergy, unspecified

T78.40 should not be used for reimbursement purposes as there are multiple sub-diagnoses that fall under this code. Please refer to the sub-diagnoses below.

Related Diagnoses

  • T78.40XAAllergy, unspecified, initial encounter
  • T78.40XDAllergy, unspecified, subsequent encounter
  • T78.40XSAllergy, unspecified, sequela
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