ICD-10 Code K35.89

Other acute appendicitis

Version 2019 Replaced Code Non-Billable Code
ICD-10: K35.89
Short Description:Other acute appendicitis
Long Description:Other acute appendicitis

Not Valid for Submission

ICD-10 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 2019 for the submission of HIPAA-covered transactions.

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

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).

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

Code Classification

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

Information for Medical Professionals

Convert K35.89 to ICD-9

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

  • 540.9 - Acute appendicitis NOS (Approximate Flag)

Synonyms

The following clinical terms are approximate synonyms:

  • Acute focal appendicitis
  • Complicated appendicitis
  • Focal appendicitis

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]

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.