Specific code 2015 ICD-9-CM Diagnosis Code 541
Appendicitis, unqualified
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 541 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 541 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Convert to ICD-10-CM: 541 converts directly to:
  • 2015/16 ICD-10-CM K37 Unspecified appendicitis
Approximate Synonyms
  • Appendicitis
  • Periappendicitis
Clinical Information
  • Acute inflammation of the appendix. Acute appendicitis is classified as simple, gangrenous, or perforated
  • 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 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 and 30 years old. national institute of diabetes and digestive and kidney diseases
ICD-9-CM Volume 2 Index entries containing back-references to 541:
  • Appendicitis 541
    • with
      • perforation, peritonitis (generalized), or rupture 540.0
        • with peritoneal abscess 540.1
      • peritoneal abscess 540.1
    • acute (catarrhal) (fulminating) (gangrenous) (inflammatory) (obstructive) (retrocecal) (suppurative) 540.9
      • with
        • perforation, peritonitis, or rupture 540.0
          • with peritoneal abscess 540.1
        • peritoneal abscess 540.1
    • chronic (recurrent) 542
    • exacerbation - see Appendicitis, acute
    • fulminating - see Appendicitis, acute
    • gangrenous - see Appendicitis, acute
    • healed (obliterative) 542
    • obstructive 542
    • pneumococcal 541
    • retrocecal 541
    • subacute (adhesive) 542
    • suppurative - see Appendicitis, acute
    • tuberculous (see also Tuberculosis) 014.8
  • Inflammation, inflamed, inflammatory (with exudation)
    • appendix (see also Appendicitis) 541
    • cecum (see also Appendicitis) 541
    • retrocecal (see also Appendicitis) 541
  • Paratyphilitis (see also Appendicitis) 541
  • Periappendicitis (acute) (see also Appendicitis) 541
  • Perityphlitis (see also Appendicitis) 541
  • Typhlitis (see also Appendicitis) 541
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 541 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2015 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.