K91.1 vs T80.49XS
K91.1 (Postgastric surgery syndromes) compared with T80.49XS (Other Rh incompatibility reaction due to transfusion of blood or blood products, sequela), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. T80.49XS carries an Excludes2 note covering K91.1: “postgastric surgery syndromes (K91.1)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| K91.1Postgastric surgery syndromes | T80.49XSOther Rh incompatibility reaction due to transfusion of blood or blood products, 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 | Postgastric surgery syndromes is a billable ICD-10-CM diagnosis code (K91.1). | Other Rh incompatibility reaction due to transfusion of blood or blood products, sequela is a billable ICD-10-CM diagnosis code (T80.49S). |
| 7th character | — | The appropriate 7th character is to be added to each code from category T80 |
| Includes | Dumping syndrome Postgastrectomy syndrome Postvagotomy syndrome | complications following perfusion Delayed serologic transfusion reaction (DSTR) from Rh incompatibility Other reaction to Rh incompatible blood transfusion |
| Use additional code | — | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code(s) to identify the specified condition resulting from the complication code to identify devices involved and details of circumstances (Y62-Y82) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources