K52.29 vs T78.41XS
K52.29 (Other allergic and dietetic gastroenteritis and colitis) compared with T78.41XS (Arthus phenomenon, sequela), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. T78.41XS carries an Excludes1 note covering K52.29: “allergic diarrhea (K52.29)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. T78.41XS carries an Excludes1 note covering K52.29: “allergic gastroenteritis and colitis (K52.29)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| K52.29Other allergic and dietetic gastroenteritis and colitis | T78.41XSArthus phenomenon, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Other allergic and dietetic gastroenteritis and colitis is a billable ICD-10-CM diagnosis code (K52.29). | Arthus phenomenon, sequela is a billable ICD-10-CM diagnosis code (T78.41S). |
| 7th character | — | The appropriate 7th character is to be added to each code from category T78 |
| Includes | noninfective inflammatory bowel disease Allergic proctocolitis Food hypersensitivity gastroenteritis or colitis Food-induced eosinophilic proctocolitis | Arthus reaction |
| Use additional code | code to identify type of food allergy (Z91.01-, Z91.02-) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources