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T78.40XD

ICD-10-CM 2027 · Billable

Allergy, unspecified, subsequent encounter

Sibling codes

  • T78.40XA – Allergy, unspecified, initial encounter
  • T78.40XS – Allergy, unspecified, sequela

Inherited from T78.40: Allergy, unspecified

Inclusion terms

  • Allergic reaction NOS
  • Hypersensitivity NOS

Inherited from T78.4: Other and unspecified allergy

Excludes1

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

Inherited from T78: Adverse effects, not elsewhere classified

7th character

  • A = initial encounter
  • D = subsequent encounter
  • S = sequela

7th character note

  • The appropriate 7th character is to be added to each code from category T78

Excludes2

  • complications of surgical and medical care NEC (T80-T88)

Part of: T78.40: Allergy, unspecified › T78.4: Other and unspecified allergy › T78: Adverse effects, not elsewhere classified