555.0 REG ENTERITIS, SM INTEST


Code Information

Diagnosis Code: 555.0

Short Description: Reg enteritis, sm intest

Long Description: Regional enteritis of small intestine

Code Classification:

  • Diseases of the digestive system (520–579)
    • Noninfective enteritis and colitis (555-558)
      • 555 Regional enteritis
        • 555.0 Reg enteritis, sm intest

Code Version: 2015 ICD-9-CM


References to Index of Diseases and Injuries

The code 555.0 has the following ICD-9-CM references to the Index of Diseases and Injuries
  • 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
        • 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

Crosswalk Information

The code 555.0 converts into the following ICD-10 code(s):
ICD-9 Code ICD-10 Code ICD-10 Description
555.0 Right Arrow K50.00 Crohn's disease of small intestine without complications
This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code ICD-9 Description
555.1 Regional enteritis of large intestine
555.2 Regional enteritis of small intestine with large intestine
555.9 Regional enteritis of unspecified site


This page was last updated on: 10/1/2014