2022 ICD-10-CM Code K35.3

Acute appendicitis with localized peritonitis

Version 2021

Not Valid for Submission

ICD-10:K35.3
Short Description:Acute appendicitis with localized peritonitis
Long Description:Acute appendicitis with localized peritonitis

Code Classification

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

K35.3 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of acute appendicitis with localized peritonitis. The code is not specific and is NOT valid for the year 2022 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding for Acute appendicitis with localized peritonitis

Non-specific codes like K35.3 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for acute appendicitis with localized peritonitis:

  • BILLABLE CODE - Use K35.30 for Acute appendicitis with localized peritonitis, without perforation or gangrene
  • BILLABLE CODE - Use K35.31 for Acute appendicitis with localized peritonitis and gangrene, without perforation
  • BILLABLE CODE - Use K35.32 for Acute appendicitis with perforation and localized peritonitis, without abscess
  • BILLABLE CODE - Use K35.33 for Acute appendicitis with perforation and localized peritonitis, with abscess

Convert K35.3 to ICD-9 Code

The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code K35.3 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.

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

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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Peritoneal Disorders

Your peritoneum is the tissue that lines your abdominal wall and covers most of the organs in your abdomen. A liquid, peritoneal fluid, lubricates the surface of this tissue.

Disorders of the peritoneum are not common. They include

Your doctor may use imaging tests or lab tests to analyze the peritoneal fluid to diagnose the problem. Treatment of peritoneal disorders depends on the cause.


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Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)