K35.211
K35.211: Acute appendicitis with generalized peritonitis, with perforation and abscess
Billable / specific codeICD-10-CM
K35.211 is a billable, specific ICD-10-CM code for acute appendicitis with generalized peritonitis, with perforation and abscess. It is valid for submission on a claim.
Check K35.211 with the rest of the claim: free scrubberInclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Appendicitis (acute) with generalized (diffuse) peritonitis following rupture or perforation of appendix, with abscess
Other codes that can never be billed with K35.211
Their own Excludes1 notes name this code, so the conflict is not listed above.
- K65Peritonitis
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
K35.211 is named in 6 Medicare coverage policies: 6 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A55336Billing and Coding: Retroperitoneal Ultrasound
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A58710Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
- A58720Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
Alphabetic index entries that lead here
- Appendicitis›with›peritonitis NEC›generalized›with›abscess›following rupture or perforation of appendix NOS
- Appendicitis›with›peritonitis NEC›generalized›with›abscess›with perforation or rupture
- Appendicitis›acute›with›peritonitis NEC›generalized›with›abscess›following rupture or perforation of appendix NOS
- Appendicitis›acute›with›peritonitis NEC›generalized›with›abscess›with perforation or rupture
Code history
Unchanged in every release from FY2024 to FY2027.