T78.080A vs T78.080S
T78.080A (Anaphylactic reaction due to egg with tolerance to baked egg, initial encounter) compared with T78.080S (Anaphylactic reaction due to egg with tolerance to baked egg, sequela), from the official CMS tabular data. T78.080A and T78.080S code the same injury at a different phase of treatment.
Can these codes be reported together?
Same injury, other encounter phase. T78.080A and T78.080S code the same injury at a different phase of treatment, set by the 7th character.
The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.
Side by side
| T78.080AAnaphylactic reaction due to egg with tolerance to baked egg, initial encounter | T78.080SAnaphylactic reaction due to egg with tolerance to baked egg, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Anaphylactic reaction due to egg with tolerance to baked egg, initial encounter is a billable ICD-10-CM diagnosis code (T78.080A). | Anaphylactic reaction due to egg with tolerance to baked egg, sequela is a billable ICD-10-CM diagnosis code (T78.080S). |
| 7th character | The appropriate 7th character is to be added to each code from category T78 | The appropriate 7th character is to be added to each code from category T78 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources