Specific code 2015 ICD-9-CM Diagnosis Code 540.9
Acute appendicitis without mention of peritonitis
  • 2015
  • Billable Thru Sept 30/2015
  • Non-Billable On/After Oct 1/2015

  • ICD-9-CM 540.9 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 540.9 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: 540.9 converts approximately to:
  • 2015/16 ICD-10-CM K35.80 Unspecified acute appendicitis
  • 2015/16 ICD-10-CM K35.89 Other acute appendicitis
Approximate Synonyms
  • Acute appendicitis
  • Acute gangrenous appendicitis
  • Appendicitis, acute
Applies To
  • Acute:
    • appendicitis without mention of perforation, peritonitis, or rupture:
      • fulminating
      • gangrenous
      • inflamed
      • obstructive
    • cecitis without mention of perforation, peritonitis, or rupture
ICD-9-CM Volume 2 Index entries containing back-references to 540.9:
  • Appendicitis 541
    • 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
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 540.9 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.