540.9 ACUTE APPENDICITIS NOS

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Code Information

Diagnosis Code: 540.9

Short Description: Acute appendicitis NOS

Long Description: Acute appendicitis without mention of peritonitis

Code Classification:

Diseases of the digestive system (520–579)
- Appendicitis (540-543)
  - 540 Acute appendicitis
    - 540.9 Acute appendicitis NOS

Code Version: 2015 ICD-9-CM

References to Index of Diseases and Injuries

The code 540.9 has the following ICD-9-CM references to the Index of Diseases and Injuries

Appendicitis 541
- 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

Crosswalk Information

The code 540.9 converts into the following ICD-10 code(s):

ICD-9 Code		ICD-10 Code	ICD-10 Description
540.9		K35.80	Unspecified acute appendicitis
540.9		K35.89	Other acute appendicitis

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
540.1	Acute appendicitis with peritoneal abscess

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

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