T78.121S: Other adverse food reaction due to egg with reactivity to baked egg, sequela
T78.121S is a billable, specific ICD-10-CM code for other adverse food reaction due to egg with reactivity to baked egg, sequela. It is valid for submission on a claim.
Check T78.121S with the rest of the claim: free scrubber7th character "S": sequela
The appropriate 7th character is to be added to each code from category T78
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- Other adverse food reaction due to egg with tolerance to baked egg (T78.120)
Excludes1 inherited from the categories above T78.121S
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above T78.121S
Not part of this code, but both may be coded when both are present.
Written on T78.1: Other adverse food reactions, not elsewhere classified
Other codes that can never be billed with T78.121S
Their own Excludes1 notes name this code, so the conflict is not listed above.
- T75Other and unspecified effects of other external causes
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
T78.121S is named in 13 Medicare coverage policies: 13 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56558Billing and Coding: Allergy Testing
- A57068Billing and Coding: Ocular Photography - External
- A57531Billing and Coding: Allergy Testing
- A60360Billing and Coding: Allergy Diagnostic Testing
Code history
- addedFY2024-FY2027
Other adverse food reaction due to egg with reactivity to baked egg, sequela