540.1 ABSCESS OF APPENDIX

Code Information

Diagnosis Code: 540.1
Short Description: Abscess of appendix
Long Description: Acute appendicitis with peritoneal abscess
Code Version: 2015 ICD-9-CM

Code Classification

Diseases of the digestive system (520–579)
- Appendicitis (540-543)
  - 540 Acute appendicitis
    - 540.1 Abscess of appendix

References to Index of Diseases and Injuries

The code 540.1 has the following ICD-9-CM references to the Index of Diseases and Injuries

Abscess (acute) (chronic) (infectional) (lymphangitic) (metastatic) (multiple) (pyogenic) (septic) (with lymphangitis) (see also Cellulitis) 682.9
- appendix 540.1
- cecum 569.5
  - with appendicitis 540.1
- ileocecal 540.1
- iliac (region) 682.2
  - fossa 540.1
- periappendiceal 540.1
- pericecal 540.1
- peritoneum, peritoneal (perforated) (ruptured) 567.22
  - with
    - appendicitis 540.1
- perityphlic 540.1
- postcecal 540.1
- subcecal 540.1
- vermiform appendix 540.1

Appendicitis 541
- with
  - perforation, peritonitis (generalized), or rupture 540.0
    - with peritoneal abscess 540.1
  - peritoneal abscess 540.1
- acute (catarrhal) (fulminating) (gangrenous) (inflammatory) (obstructive) (retrocecal) (suppurative) 540.9
  - with
    - perforation, peritonitis, or rupture 540.0
      - with peritoneal abscess 540.1
    - peritoneal abscess 540.1

Perforation, perforative (nontraumatic)
- appendix 540.0
  - with peritoneal abscess 540.1
- cecum 540.0
  - with peritoneal abscess 540.1

Peritonitis (acute) (adhesive) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) 567.9
- with or following
  - appendicitis 540.0
    - with peritoneal abscess 540.1

Phlegmon (see also Abscess) 682.9
- iliac 682.2
  - fossa 540.1

Rupture, ruptured 553.9
- appendix (with peritonitis) 540.0
  - with peritoneal abscess 540.1
- cecum (with peritonitis) 540.0
  - with peritoneal abscess 540.1

Crosswalk Information

The code 540.1 converts into the following ICD-10 code(s):

ICD-9 Code		ICD-10 Code	ICD-10 Description
540.1		K35.3	Acute appendicitis with localized peritonitis

This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code	ICD-9 Description
540.0	Acute appendicitis with generalized peritonitis
540.9	Acute appendicitis without mention of peritonitis

This page was last updated on: 10/1/2014

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