K35.33 – Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess
ICD-10-CM 2027 diagnosis code · Diseases of appendix
ICD-10-CM code
K35.33
- Code
K35.33(claims format:K3533)- Description
- Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess
- Short description
- Ac appendicitis with perf, loc peritonitis, and gangr, wbscs
- 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
Notes for K35.33
Applicable to:
- (Acute) appendicitis with (peritoneal) abscess NOS
- Ruptured appendix with localized peritonitis and abscess
Index terms for K35.33
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Abscess, cecum
- Abscess, subcecal
- Abscess, appendix
- Abscess, pericecal
- Abscess, postcecal
- Abscess, ileocecal
- Abscess, perityphlic
- Abscess, iliac, fossa
- Abscess, periappendicular
- Abscess, vermiform appendix
- Appendicitis, with, peritonitis NEC
- Appendicitis, with, peritoneal abscess
- Appendicitis, acute, with, peritonitis NEC
- Appendicitis, acute, with, peritoneal abscess
- Rupture, ruptured, cecum, with peritoneal abscess
- Abscess, peritoneum, peritoneal, with appendicitis
- Appendicitis, with, peritonitis NEC, localized, with, perforation, and abscess
- Appendicitis, acute, with, peritonitis NEC, localized, with, perforation, and abscess
Related codes in K35.3
Frequently asked questions
What is ICD-10 code K35.33?
K35.33 is the ICD-10-CM code for acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess, in the block K35-K38 (Diseases of appendix).
Is K35.33 a billable code?
Yes. K35.33 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does K35.33 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.