K91.2 is a billable ICD code used to specify a diagnosis of postsurgical malabsorption, not elsewhere classified
Crohn’s Disease
Crohn’s disease causes inflammation in the GI tract lining. It may spread into the deep layers of the affected tissue and can be painful and debilitating. Crohn’s disease mainly affects short segments of the small and large intestine.
Crohn’s disease is classified to ICD-9-CM category 555, Regional enteritis. The specific code assignment depends on the site affected by the disease, as follows:
• 555.0, Crohn’s disease of small intestine, including duodenum, ileum, and jejunum (regional ileitis);
• 555.1, Crohn’s disease of large intestine (regional colitis);
• 555.2, Crohn’s disease of small intestine with large intestine (regional ileocolitis); and
• 555.9, Crohn’s disease of unspecified site (regional enteritis, not otherwise specified).