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T78.40XD
Billable

Allergy, unspecified (subsequent encounter)

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

Inclusion Terms

2 items
  • Allergic reaction NOS
  • Hypersensitivity NOS

Billable Code

T78.40XD is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Additional Information from Parent Codes

The following information may apply to this code from its parent codes in the ICD-10 hierarchy. This information is important for proper coding and classification.

Inclusion Terms

2 items

From T78.40:

  • Allergic reaction NOS
  • Hypersensitivity NOS

Excludes1

9 items

From S00-T88:

From T78.4:

  • 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)

Excludes2

1 item

From T78:

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

Use Additional Code

1 item

From S00-T88:

  • code to identify any retained foreign body, if applicable (Z18.-)

7th Character Notes

4 items

From T78:

  • The appropriate 7th character is to be added to each code from category T78
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela
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