T78.121
Non-billableOther adverse food reaction due to egg with reactivity to baked egg
T78.121 is the ICD-10-CM code for Other adverse food reaction due to egg with reactivity to baked egg. It is a non-billable category code — use a more specific child code such as T78.121A for billing.
S00-T88 Injury, poisoning and certain other consequences of external causes
Excludes1 — not coded here
- •Other adverse food reaction due to egg with tolerance to baked egg (T78.120)
Frequently asked questions
- What is ICD-10 code T78.121?
- T78.121 is the ICD-10-CM code for "Other adverse food reaction due to egg with reactivity to baked egg". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
- Is T78.121 a billable code?
- No — T78.121 is a non-billable header code. Use a more specific child code (such as T78.121A) for billing.
- What are the subcodes of T78.121?
- T78.121 has 3 more specific child codes, including T78.121A, T78.121D, T78.121S.
- What is excluded from T78.121?
- Excludes1 (not coded here): Other adverse food reaction due to egg with tolerance to baked egg (T78.120).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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