ICD-10 Code K35.3

Acute appendicitis with localized peritonitis

Version 2019 Replaced Code Non-Billable Code
ICD-10: K35.3
Short Description:Acute appendicitis with localized peritonitis
Long Description:Acute appendicitis with localized peritonitis

Not Valid for Submission

ICD-10 K35.3 is a "header" nonspecific and non-billable 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 valid for the year 2019 for the submission of HIPAA-covered transactions.

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

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

Deleted Code

This code was deleted in the 2019 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, 2018. This code was replaced for the FY 2019 (October 1, 2018 - September 30, 2019).

  • K35.30 - Acute appendicitis with loc peritonitis, w/o perf or gangr
  • K35.31 - Acute appendicitis with loc peritonitis and gangr, w/o perf
  • K35.32 - Acute appendicitis with perf and loc peritonitis, w/o abscs
  • K35.33 - Acute appendicitis with perf and loc peritonitis, with abscs

Code Classification

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

Information for Medical Professionals

Convert K35.3 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 540.1 - Abscess of appendix (Approximate Flag)

Synonyms

The following clinical terms are approximate synonyms:

  • Acute appendicitis with localized peritonitis
  • Acute appendicitis with peritoneal abscess
  • Acute appendicitis with peritonitis
  • Pericecal abscess

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

  • Appendectomy (Medical Encyclopedia)
  • Appendicitis (Medical Encyclopedia)

[Learn More]

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

  • Peritonitis - an inflammation of the peritoneum
  • Cancer
  • Complications from peritoneal dialysis

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.

  • Peritonitis (Medical Encyclopedia)
  • Peritonitis - secondary (Medical Encyclopedia)
  • Peritonitis - spontaneous bacterial (Medical Encyclopedia)
  • Retroperitoneal inflammation (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.