K51.0 Ulcerative (chronic) pancolitis

The ICD-10-CM code for Ulcerative (chronic) pancolitis is K51.0 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

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

Section

K50-K52: Noninfective enteritis and colitis (K50-K52)

Category K51

64 codes (49 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to K51.0:

• Ileocolitis › ulcerative

Inclusion Terms

• Backwash ileitis

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