ICD-10-CM > S00-T88 > T66-T78 > T78 > T78.1 > T78.12 > T78.121 T78.121 Other adverse food reaction due to egg with reactivity to baked egg Non-Billable/Non-Specific Type 1 Excludes Other adverse food reaction due to egg with tolerance to baked egg (T78.120) Codes T78.121A..., initial encounterT78.121D..., subsequent encounterT78.121S..., sequela