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  6. 2026 ICD-10-CM Code T78.119

2026 ICD-10-CM Diagnosis Code T78.119

Other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified

ICD-10-CM Code:
T78.119
ICD-10 Code for:
Oth ad rct d/t milk and dair prod w bkd milk tol/rct, unsp
Is Billable?
Not Valid for Submission
Code Navigator:

T78.119 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other adverse food reaction due to milk and dairy products with baked milk tolerance/reactivity, unspecified. The code is not specific and is NOT valid for the year 2026 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like T78.119 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Specific Coding Applicable to Oth ad rct d/t milk and dair prod w bkd milk tol/rct, unsp

Non-specific codes like T78.119 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for oth ad rct d/t milk and dair prod w bkd milk tol/rct, unsp:

  • Use T78.119A for initial encounter - BILLABLE CODE

  • Use T78.119D for subsequent encounter - BILLABLE CODE

  • Use T78.119S for sequela - BILLABLE CODE

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    S00–T88
    • Other and unspecified effects of external causes
      T66-T78
      • Adverse effects, not elsewhere classified
        T78

Coding Guidelines

The appropriate 7th character is to be added to each code from block Adverse effects, not elsewhere classified (T78). Use the following options for the aplicable episode of care:

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

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Index of External Cause of Injuries

References found for this diagnosis code in the External Cause of Injuries Index:

    • Allergy, allergic(reaction) (to)
      • dairy products
    • Allergy, allergic(reaction) (to)
      • milk protein
        • adverse reaction NEC

Code History

  • FY 2026 - No Change, effective from 10/1/2025 through 9/30/2026