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K91.86

✓ Billable

Retained cholelithiasis following cholecystectomy

Diseases of the digestive system (K00-K95)

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⚠️ Excludes2

inherited

Rules inherited from parent codes.

K91
  • • complications of artificial opening of digestive system (K94.-)
  • • complications of bariatric procedures (K95.-)
  • • gastrojejunal ulcer (K28.-)
  • • postprocedural (radiation) retroperitoneal abscess (K68.11)
  • • radiation colitis (K52.0)
  • • radiation gastroenteritis (K52.0)
  • • radiation proctitis (K62.7)

Clinical Description

ICD-10-CM code K91.86 represents retained cholelithiasis following cholecystectomy. This code falls under the Diseases of the digestive system (K00-K95) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory.

Frequently Asked Questions

What is ICD-10 code K91.86?

ICD-10-CM code K91.86 is "Retained cholelithiasis following cholecystectomy". It belongs to the category: Diseases of the digestive system (K00-K95).

Is K91.86 a billable ICD-10 code?

Yes, K91.86 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Can K91.86 be coded with other codes?

K91.86 has 7 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in K91.8

Other codes in the same category that may be relevant for differential coding:

K91.81Other intraoperative complications of digestive systemK91.82Postprocedural hepatic failureK91.83Postprocedural hepatorenal syndromeK91.84Postprocedural hemorrhage of a digestive system organ or structure following a procedureK91.85Complications of intestinal pouchK91.87Postprocedural hematoma and seroma of a digestive system organ or structure following a procedureK91.89Other postprocedural complications and disorders of digestive system

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Code Information

CodeK91.86
BillableYes
ParentK91.8
CategoryDiseases of the digestive system (K00-K95)
Excludes10 rule(s)
Excludes27 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)