2024 ICD-10-CM Diagnosis Code K65.1

Peritoneal abscess

ICD-10-CM Code:
ICD-10 Code for:
Peritoneal abscess
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Diseases of the digestive system
    • Diseases of peritoneum and retroperitoneum
      • Peritonitis

K65.1 is a billable diagnosis code used to specify a medical diagnosis of peritoneal abscess. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Abdominal abscess
  • Abdominal visceral abscess
  • Abdominopelvic abscess
  • Abscess between intestinal loops
  • Abscess due to peritonitis
  • Abscess of abdomen caused by Nocardia
  • Abscess of adrenal gland
  • Abscess of omentum
  • Abscess of peritoneum
  • Abscess of Rutherford Morison pouch
  • Acute male pelvic abscess
  • Intradiaphragmatic abscess
  • Lesser sac abscess
  • Male pelvic abscess
  • Mesenteric abscess
  • Midabdominal abscess
  • Paracolic abscess
  • Pelvic abscess
  • Peritonitis due to abscess
  • Postoperative intra-abdominal abscess
  • Postprocedural intraabdominal abscess
  • Retrocecal abscess
  • Retroperitoneal abscess
  • Subdiaphragmatic abscess
  • Subhepatic abscess
  • Subperitoneal abscess
  • Suprahepatic abscess

Clinical Classification

Clinical Information

  • Abdominal Abscess

    an abscess located in the abdominal cavity, i.e., the cavity between the diaphragm above and the pelvis below. (from dorland, 27th ed)
  • Pelvic Abscess

    an abscess that is located in the pelvic cavity.
  • Mesenteric Abscess

    an abscess that is located in any part of the tissue composing the mesentery, and that generally arises from an infection in an adjacent area of the intestine.
  • Retroperitoneal Abscess

    an abscess that is located in the abdominal cavity posterior to the peritoneum.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Abdominopelvic abscess
  • Abscess (of) omentum
  • Abscess (of) peritoneum
  • Mesenteric abscess
  • Retrocecal abscess
  • Subdiaphragmatic abscess
  • Subhepatic abscess
  • Subphrenic abscess

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert K65.1 to ICD-9-CM

  • ICD-9-CM Code: 567.22 - Peritoneal abscess

Patient Education


An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms. Pus is a mixture of living and dead white blood cells, germs, and dead tissue.

Bacteria, viruses, parasites and swallowed objects can all lead to abscesses. Skin abscesses are easy to detect. They are red, raised and painful. Abscesses inside your body may not be obvious and can damage organs, including the brain, lungs and others. Treatments include drainage and antibiotics.

[Learn More in MedlinePlus]

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.

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.