All ICD10 Codes

K57.21

Billable
ChapterK00–K95
Ranksubcategory
Official Description

Diverticulitis of large intestine with perforation and abscess with bleeding

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 11: Diseases of the Digestive System (K00-K95).
General instructions are available for the parent sections:
View CH11 NotesView K57 NotesView K57.2 Notes

Clinical Hierarchy

CH11Diseases of the digestive system (K00-K95)
K55-K64Other diseases of intestines (K55-K64)
K57Diverticular disease of intestine
K57.2Diverticulitis of large intestine with perforation and abscess
K57.21Diverticulitis of large intestine with perforation and abscess with bleeding

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to K57.21:

subcategoryK57.2
Diverticulitis of large intestine with perforation and abscess
View context instructions
categoryK57
Diverticular disease of intestine
View context instructions
chapterCH11
Diseases of the digestive system (K00-K95)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to K57.21. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

5 raw paths
Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)1 unique routes
with
diverticular disease (intestine)
large intestine
with
bleeding→K57.21
Diverticulitis (acute)1 unique routes
intestine
large
with
abscess, perforation
with bleeding→K57.21
Perforation, perforated (nontraumatic) (of)1 unique routes
diverticulum (intestine)
large intestine
with
bleeding→K57.21
Peritonitis (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion)1 unique routes
with or following
diverticular disease (intestine)
large intestine
with
bleeding→K57.21
Rupture, ruptured1 unique routes
diverticulum (intestine)
large intestine
with
bleeding→K57.21

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 377
Gastrointestinal Hemorrhage with MCC
DRG 378
Gastrointestinal Hemorrhage with CC
DRG 379
Gastrointestinal Hemorrhage without CC/MCC

Cross Reference

Find Procedures (ICD-10-PCS)

Find surgical and procedural codes related to Diverticulitis of large intestine with perforation and abscess with bleeding.

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