ICD-10-CM Code K35.89

Other acute appendicitis

Version 2020 Replaced Code Non-Billable Code

Not Valid for Submission

K35.89 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other acute appendicitis. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:K35.89
Short Description:Other acute appendicitis
Long Description:Other acute appendicitis

Consider the following ICD-10 codes with a higher level of specificity:

  • K35.890 - Other acute appendicitis without perforation or gangrene
  • K35.891 - Other acute appendicitis without perforation, with gangrene

Replaced Code

This code was replaced in the 2020 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2019. This code was replaced for the FY 2020 (October 1, 2019 - September 30, 2020).

  • K35.890 - Other acute appendicitis without perforation or gangrene
  • K35.891 - Other acute appendicitis without perforation, with gangrene

Convert K35.89 to ICD-9

  • 540.9 - Acute appendicitis NOS (Approximate Flag)

Code Classification

  • Diseases of the digestive system (K00–K93)
    • Diseases of appendix (K35-K38)
      • Acute appendicitis (K35)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - Code Deleted, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Appendicitis

The appendix is a small, tube-like organ attached to the first part of the large intestine. It is located in the lower right part of the abdomen. It has no known function. A blockage inside of the appendix causes appendicitis. The blockage leads to increased pressure, problems with blood flow, and inflammation. If the blockage is not treated, the appendix can burst and spread infection into the abdomen. This causes a condition called peritonitis.

The main symptom is pain in the abdomen, often on the right side. It is usually sudden and gets worse over time. Other symptoms may include

  • Swelling in the abdomen
  • Loss of appetite
  • Nausea and vomiting
  • Constipation or diarrhea
  • Inability to pass gas
  • Low fever

Not everyone with appendicitis has all these symptoms.

Appendicitis is a medical emergency. Treatment almost always involves removing the appendix. Anyone can get appendicitis, but it is more common among people 10 to 30 years old.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


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