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T78.4

Other and unspecified allergy

Non-billableCategory

Code Hierarchy

T78T78.4

Chapter: 19. Injury, poisoning and certain other consequences of external causes

Section: T66-T78 - Other and unspecified effects of external causes

Coding Guidelines

Excludes1 (Mutually Exclusive)

These codes should never be used together with T78.4

  • specified types of allergic reaction such as:
  • K52.29 - allergic diarrhea (K52.29)
  • K52.29 - allergic gastroenteritis and colitis (K52.29)
  • dermatitis (L23-L25, L27.-)
  • K52.21 - food protein-induced enterocolitis syndrome (K52.21)
  • K52.22 - food protein-induced enteropathy (K52.22)
  • J30.1 - hay fever (J30.1)

Specific Codes (3)

T78.40Category

Allergy, unspecified

T78.41Category

Arthus phenomenon

T78.49Category

Other allergy

Related Codes

T78.0Category

Anaphylactic reaction due to food

T78.1Category

Other adverse food reactions, not elsewhere classified

T78.2Category

Anaphylactic shock, unspecified

T78.3Category

Angioneurotic edema

T78.8Category

Other adverse effects, not elsewhere classified

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