eMedCodes logo

T78.40 - Allergy, unspecified


The ICD 10 Code for Allergy, unspecified is listed as T78.40.
Additional information concerning this code and description can be found below including ICD 9 crosswalks / GEMS, chapter information, and DRGs where available.

ICD 10 CM Field Value
Diagnosis Code: T78.40
Description: Allergy, unspecified
  • Allergic reaction NOS
  • Hypersensitivity NOS
Chapter Injury, poisoning and certain other consequences of external causes (S00-T88)
Block Other and unspecified effects of external causes (T66-T78)
Parent T78.4 - Other and unspecified allergy
ICD-10-CM Siblings (same level / similar specificity) of T78.40:
T78.41 - Arthus phenomenon
T78.49 - Other allergy