| Billroth I | |
|---|---|
| Other names | Billroth's operation I |
| ICD-9-CM | 43.6 |

Billroth I, more formallyBillroth's operation I, is anoperation in which thepylorus is removed and the distalstomach isanastomosed directly to theduodenum.[1][2]
The operation is most closely associated withTheodor Billroth, but was first described byPolishsurgeonLudwik Rydygier.[2]
The surgical procedure is called agastroduodenostomy.[1]