K66.0 Peritoneal adhesions (postprocedural) (postinfection)

The ICD-10-CM code for Peritoneal adhesions (postprocedural) (postinfection) is K66.0 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

11: Diseases of the digestive system (K00-K95)

Section

K65-K68: Diseases of peritoneum and retroperitoneum (K65-K68)

Category K66

5 codes (4 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K66.0:

• Adhesions, adhesive (postinfective)
• Adhesions, adhesive (postinfective) › postoperative (gastrointestinal tract)
• Adhesions, adhesive (postinfective) › peritoneum, peritoneal (postinfective)
• Adhesions, adhesive (postinfective) › peritoneum, peritoneal (postinfective) › postprocedural

Inclusion Terms

• Adhesions (of) abdominal (wall)
• Adhesions (of) diaphragm
• Adhesions (of) intestine
• Adhesions (of) male pelvis
• Adhesions (of) omentum
• Adhesions (of) stomach
• Adhesive bands
• Mesenteric adhesions

U.S. Hospital Utilization

• An estimated 218,150 U.S. inpatient stays in 2023 included K66.0 among the documented diagnoses.
• 1,970 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

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

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)