T78.129A
✓ Billable
Other adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, initial encounter
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
T78.129A
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code T78.129A?
ICD-10-CM code T78.129A represents Other adverse food reaction due to egg with baked egg tolerance/reactivity, unspecified, initial encounter. It is a billable diagnosis code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is T78.129A billable?
Yes. T78.129A is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is T78.129A in?
T78.129A belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the T78 category
T78
Adverse effects, not elsewhere classified
Non-billable
T78.0
Anaphylactic reaction due to food
Non-billable
T78.1
Other adverse food reactions, not elsewhere classified
Non-billable
T78.2
Anaphylactic shock, unspecified
Non-billable
T78.3
Angioneurotic edema
Non-billable
T78.4
Other and unspecified allergy
Non-billable
T78.8
Other adverse effects, not elsewhere classified
Non-billable
T78.00
Anaphylactic reaction due to unspecified food
Non-billable
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