Specific code 2012 ICD-9-CM Diagnosis Code 541
Appendicitis, unqualified
  • Short description: Appendicitis NOS.
  • ICD-9-CM 541 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 541 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
  • You are viewing the 2012 version of ICD-9-CM 541.
  • More recent version(s) of ICD-9-CM 541: 2013 2014.
Disease Synonyms
  • Appendicitis
  • Periappendicitis
Convert to ICD-10-CM: 541 converts directly to:
  • 2014 ICD-10-CM K37 Unspecified appendicitis
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 2012 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.