Specific code 2014 ICD-9-CM Diagnosis Code 555.0
Regional enteritis of small intestine
  • Billable Code
  • Short description: Reg enteritis, sm intest.
  • ICD-9-CM 555.0 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 555.0 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Abscess of intestine due to Crohn's disease of small intestine
  • Complication due to Crohn's disease of small intestine
  • Crohns disease exacerbation of small intestine
  • Crohns disease of small intestine
  • Crohn's disease of small intestine
  • Crohns disease of small intestine w abscess
  • Crohns disease of small intestine w complication
  • Crohns disease of small intestine w fistula
  • Crohns disease of small intestine w obstruction
  • Crohns disease of small intestine w rectal bleeding
  • Crohns disease of small intestine with abscess
  • Crohns disease of small intestine with complication
  • Crohns disease of small intestine with fistula
  • Crohns disease of small intestine with obstruction
  • Crohns disease of small intestine with rectal bleeding
  • Crohns disease of small intestine, exacerbation
  • Crohns disease, small intestine
  • Exacerbation of Crohn's disease of small intestine
  • Fistula of intestine due to Crohn's disease of small intestine
  • Intestinal obstruction due to Crohn's disease of small intestine
  • Rectal hemorrhage due to Crohn's disease of small intestine
  • Terminal ileitis
Applies To
  • Ileitis:
    • regional
    • segmental
    • terminal
  • Regional enteritis or Crohn's disease of:
    • duodenum
    • ileum
    • jejunum
Convert to ICD-10-CM: 555.0 converts approximately to:
  • 2014 ICD-10-CM K50.00 Crohn's disease of small intestine without complications
ICD-9-CM Volume 2 Index entries containing back-references to 555.0:
  • Enteritis (acute) (catarrhal) (choleraic) (chronic) (congestive) (diarrheal) (exudative) (follicular) (hemorrhagic) (infantile) (lienteric) (noninfectious) (perforative) (phlegmonous) (presumed noninfectious) (pseudomembranous) 558.9
    • cicatrizing (chronic) 555.0
    • regional (of) 555.9
      • intestine
        • large (bowel, colon, or rectum) 555.1
          • with small intestine 555.2
        • small (duodenum, ileum, or jejunum) 555.0
          • with large intestine 555.2
  • Ileitis (chronic) (see also Enteritis) 558.9
    • regional (ulcerative) 555.0
      • with large intestine 555.2
    • segmental 555.0
      • with large intestine 555.2
    • terminal (ulcerative) 555.0
      • with large intestine 555.2
  • Inflammation, inflamed, inflammatory (with exudation)
    • ileum (see also Enteritis) 558.9
      • terminal or regional 555.0
        • with large intestine 555.2
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 555.0 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 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.