K57.21 – Diverticulitis of large intestine with perforation and abscess with bleeding
ICD-10-CM 2027 diagnosis code · Other diseases of intestines
ICD-10-CM code
K57.21
- Code
K57.21(claims format:K5721)- Description
- Diverticulitis of large intestine with perforation and abscess with bleeding
- Short description
- Dvtrcli of lg int w perforation and abscess w bleeding
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 11. Diseases of the digestive system (K00-K95)
- Block
- K55-K64 Other diseases of intestines
- Parent codes
- K57 › K57.2
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
K57 – Diverticular disease of intestine
Excludes1 (not coded here):
Excludes2 (not included here):
- diverticulum of appendix (K38.2)
K57.2 – Diverticulitis of large intestine with perforation and abscess
Excludes1 (not coded here):
- diverticulitis of both small and large intestine with perforation and abscess (K57.4-)
Index terms for K57.21
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Rupture, ruptured, diverticulum, large intestine, with, bleeding
- Abscess, with, diverticular disease, large intestine, with, bleeding
- Perforation, perforated, diverticulum, large intestine, with, bleeding
- Diverticulitis, intestine, large, with, abscess, perforation, with bleeding
- Peritonitis, with or following, diverticular disease, large intestine, with, bleeding
Related codes in K57.2
Frequently asked questions
What is ICD-10 code K57.21?
K57.21 is the ICD-10-CM code for diverticulitis of large intestine with perforation and abscess with bleeding, in the block K55-K64 (Other diseases of intestines).
Is K57.21 a billable code?
Yes. K57.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does K57.21 belong to?
It belongs to category K57 – Diverticular disease of intestine.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.