All ICD10 Codes

K51

Non-Billable
ChapterK00–K95
Rankcategory
Official Description

Ulcerative colitis

Use a more specific code (0 billable, 7 non-billable)
K51.0Ulcerative (chronic) pancolitishas subcodesK51.2Ulcerative (chronic) proctitishas subcodesK51.3Ulcerative (chronic) rectosigmoiditishas subcodesK51.4Inflammatory polyps of colonhas subcodesK51.5Left sided colitishas subcodesK51.8Other ulcerative colitishas subcodesK51.9Ulcerative colitis, unspecifiedhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).

CH11 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

K50-K52 Parent Instructions

Includes
  • noninfective inflammatory bowel disease
Excludes1(Not coded here. Use a different code.)
  • irritable bowel syndrome (K58.-)
  • megacolon (K59.3-)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • Crohn's disease [regional enteritis] (K50.-)
Use Additional Code
  • code to identify any associated fistulas, if applicable:
  • anal fistula (K60.3-)
  • anorectal fistula (K60.5-)
  • rectal fistula (K60.4-)
  • code to identify manifestations, such as:
  • pyoderma gangrenosum (L88)

Clinical Hierarchy

BillableHas subcodes
CH11Diseases of the digestive system (K00-K95)
K50-K52Noninfective enteritis and colitis (K50-K52)
K51Ulcerative colitisNot billable
K51.0Ulcerative (chronic) pancolitisSubcodes
K51.2Ulcerative (chronic) proctitisSubcodes
K51.3Ulcerative (chronic) rectosigmoiditisSubcodes
K51.4Inflammatory polyps of colonSubcodes
K51.5Left sided colitisSubcodes
K51.8Other ulcerative colitisSubcodes
K51.9Ulcerative colitis, unspecifiedSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K51:

blockK50-K52
Noninfective enteritis and colitis (K50-K52)
View context instructions
chapterCH11
Diseases of the digestive system (K00-K95)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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