ICD-9 Diagnosis Code 540.1

Abscess of appendix

Diagnosis Code 540.1

ICD-9: 540.1
Short Description: Abscess of appendix
Long Description: Acute appendicitis with peritoneal abscess
This is the 2014 version of the ICD-9-CM diagnosis code 540.1

Code Classification
  • Diseases of the digestive system
    • Appendicitis (540-543)
      • 540 Acute appendicitis

Information for Medical Professionals

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Index of Diseases and Injuries
References found for the code 540.1 in the Index of Diseases and Injuries:

Information for Patients


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.

  • Abscess
  • Abscess scan - radioactive
  • Amebic liver abscess
  • Anorectal abscess
  • Bartholin's abscess
  • Brain abscess
  • Epidural abscess
  • Intra-abdominal abscess
  • Pancreatic abscess
  • Perirenal abscess
  • Peritonsillar abscess
  • Pilonidal cyst resection
  • Pyogenic liver abscess
  • Retropharyngeal abscess
  • Skin abscess
  • Subareolar abscess
  • Tooth abscess

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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
  • Appendicitis - NIH (National Institute of Diabetes and Digestive and Kidney Diseases)
  • Appendicitis

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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

  • 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.

  • Abdominal tap
  • Peritoneal fluid analysis
  • Peritoneal fluid culture
  • Peritonitis
  • Peritonitis - secondary
  • Peritonitis - spontaneous
  • Retroperitoneal inflammation

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