K91: Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
K91.3: Postprocedural intestinal obstruction
K91.30: Postprocedural intestinal obstruction, unspecified as to partial versus complete
K91.31: Postprocedural partial intestinal obstruction
K91.32: Postprocedural complete intestinal obstruction

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