K35.31 – Acute appendicitis with localized peritonitis and gangrene, without perforation
ICD-10-CM 2027 diagnosis code · Diseases of appendix
ICD-10-CM code
K35.31
- Code
K35.31(claims format:K3531)- Description
- Acute appendicitis with localized peritonitis and gangrene, without perforation
- Short description
- Acute appendicitis with loc peritonitis and gangr, w/o perf
- 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
- K35-K38 Diseases of appendix
- Parent codes
- K35 › K35.3
Index terms for K35.31
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Appendicitis, with, gangrene, with localized peritonitis
- Gangrene, gangrenous, appendix, with, peritonitis, localized
- Appendicitis, with, peritonitis NEC, localized, with, gangrene
- Appendicitis, acute, with, peritonitis NEC, localized, with, gangrene
- Appendicitis, acute, specified NEC, with gangrene, with localized peritonitis
Related codes in K35.3
- K35.30 – Acute appendicitis with localized peritonitis, without perforation or gangreneBillable
- K35.32 – Acute appendicitis with perforation, localized peritonitis, and gangrene, without abscessBillable
- K35.33 – Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscessBillable
Frequently asked questions
What is ICD-10 code K35.31?
K35.31 is the ICD-10-CM code for acute appendicitis with localized peritonitis and gangrene, without perforation, in the block K35-K38 (Diseases of appendix).
Is K35.31 a billable code?
Yes. K35.31 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does K35.31 belong to?
It belongs to category K35 – Acute appendicitis.
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.