K91.86 Retained cholelithiasis following cholecystectomy

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Retained cholelithiasis following cholecystectomy is K91.86 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
K90-K95: Other diseases of the digestive system (K90-K95)
Category K91
32 codes (24 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K91.86:

  • Retained › cholelithiasis following cholecystectomy
  • Retention › gallstones, following cholecystectomy
  • Retained › gallstones, following cholecystectomy
  • Retention › cholelithiasis following cholecystectomy

U.S. Hospital Utilization

  • An estimated 3,925 U.S. inpatient stays in 2023 included K91.86 among the documented diagnoses.
  • 2,490 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 11 reserved for future expansion

11. Chapter 11: Diseases of the Digestive System (K00-K95) Reserved for future guideline expansion

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.11

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified

Related Codes in K91

K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified K91.0 Vomiting following gastrointestinal surgery K91.1 Postgastric surgery syndromes K91.2 Postsurgical malabsorption, 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 K91.5 Postcholecystectomy syndrome K91.6 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a procedure K91.61 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a digestive system procedure K91.62 Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating other procedure K91.7 Accidental puncture and laceration of a digestive system organ or structure during a procedure K91.71 Accidental puncture and laceration of a digestive system organ or structure during a digestive system procedure K91.72 Accidental puncture and laceration of a digestive system organ or structure during other procedure K91.8 Other intraoperative and postprocedural complications and disorders of digestive system K91.81 Other intraoperative complications of digestive system K91.82 Postprocedural hepatic failure K91.83 Postprocedural hepatorenal syndrome K91.84 Postprocedural hemorrhage of a digestive system organ or structure following a procedure
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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