ICD-10 Code K91 – Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K91 – Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
What it is
K91 is the category for digestive system complications or disorders that occur during or after a procedure and do not fit a more specific code. Use it when documentation shows a postprocedural digestive complication, but the exact type is not named.
Clinical signs
Clinical features vary; refer to documentation. Records may describe abdominal pain, nausea, vomiting, ileus, bleeding, obstruction, leak, or other postoperative digestive problems tied to a recent procedure.
When to use this code
Use K91 when the provider documents an intraoperative or postprocedural complication involving the digestive system and no more specific subcategory is available. It may apply after surgery, endoscopy, or another GI procedure if the complication is clearly linked to the intervention. Check documentation for the exact complication and timing.
Do not use for
Do not use K91 for routine postoperative pain, expected recovery findings, or complications that have a more specific ICD-10-CM code. Do not assign it when the digestive issue is unrelated to the procedure.
Coding tip
Always code the specific complication first if documentation names it; use K91 only when the record supports a digestive procedural complication but no narrower code fits.