ICD-10-CM Book 2024 Edition

Chapters  /  Chapter 11  /  K50-K52

Noninfective enteritis and colitis (K50-K52)

Includes: noninfective inflammatory bowel disease
Excludes1: irritable bowel syndrome (K58.-)
megacolon (K59.3-)
K50 Crohn's disease [regional enteritis]
Includes granulomatous enteritis
UseAdditionalCode code to identify manifestations, such as:
pyoderma gangrenosum (L88)
Excludes1 ulcerative colitis (K51.-)
K50.0 Crohn's disease of small intestine
Crohn's disease [regional enteritis] of duodenum
Crohn's disease [regional enteritis] of ileum
Crohn's disease [regional enteritis] of jejunum
Regional ileitis
Terminal ileitis
Excludes1 Crohn's disease of both small and large intestine (K50.8-)
K50.00 Crohn's disease of small intestine without complications
K50.01 Crohn's disease of small intestine with complications
K50.011 Crohn's disease of small intestine with rectal bleeding
K50.012 Crohn's disease of small intestine with intestinal obstruction
K50.013 Crohn's disease of small intestine with fistula
K50.014 Crohn's disease of small intestine with abscess
K50.018 Crohn's disease of small intestine with other complication
K50.019 Crohn's disease of small intestine with unspecified complications
K50.1 Crohn's disease of large intestine
Crohn's disease [regional enteritis] of colon
Crohn's disease [regional enteritis] of large bowel
Crohn's disease [regional enteritis] of rectum
Granulomatous colitis
Regional colitis
Excludes1 Crohn's disease of both small and large intestine (K50.8)
K50.10 Crohn's disease of large intestine without complications
K50.11 Crohn's disease of large intestine with complications
K50.111 Crohn's disease of large intestine with rectal bleeding
K50.112 Crohn's disease of large intestine with intestinal obstruction
K50.113 Crohn's disease of large intestine with fistula
K50.114 Crohn's disease of large intestine with abscess
K50.118 Crohn's disease of large intestine with other complication
K50.119 Crohn's disease of large intestine with unspecified complications
K50.8 Crohn's disease of both small and large intestine
K50.80 Crohn's disease of both small and large intestine without complications
K50.81 Crohn's disease of both small and large intestine with complications
K50.811 Crohn's disease of both small and large intestine with rectal bleeding
K50.812 Crohn's disease of both small and large intestine with intestinal obstruction
K50.813 Crohn's disease of both small and large intestine with fistula
K50.814 Crohn's disease of both small and large intestine with abscess
K50.818 Crohn's disease of both small and large intestine with other complication
K50.819 Crohn's disease of both small and large intestine with unspecified complications
K50.9 Crohn's disease, unspecified
K50.90 Crohn's disease, unspecified, without complications
Crohn's disease NOS
Regional enteritis NOS
K50.91 Crohn's disease, unspecified, with complications
K50.911 Crohn's disease, unspecified, with rectal bleeding
K50.912 Crohn's disease, unspecified, with intestinal obstruction
K50.913 Crohn's disease, unspecified, with fistula
K50.914 Crohn's disease, unspecified, with abscess
K50.918 Crohn's disease, unspecified, with other complication
K50.919 Crohn's disease, unspecified, with unspecified complications
K51 Ulcerative colitis
UseAdditionalCode code to identify manifestations, such as:
pyoderma gangrenosum (L88)
Excludes1 Crohn's disease [regional enteritis] (K50.-)
K51.0 Ulcerative (chronic) pancolitis
Backwash ileitis
K51.00 Ulcerative (chronic) pancolitis without complications
Ulcerative (chronic) pancolitis NOS
K51.01 Ulcerative (chronic) pancolitis with complications
K51.011 Ulcerative (chronic) pancolitis with rectal bleeding
K51.012 Ulcerative (chronic) pancolitis with intestinal obstruction
K51.013 Ulcerative (chronic) pancolitis with fistula
K51.014 Ulcerative (chronic) pancolitis with abscess
K51.018 Ulcerative (chronic) pancolitis with other complication
K51.019 Ulcerative (chronic) pancolitis with unspecified complications
K51.2 Ulcerative (chronic) proctitis
K51.20 Ulcerative (chronic) proctitis without complications
Ulcerative (chronic) proctitis NOS
K51.21 Ulcerative (chronic) proctitis with complications
K51.211 Ulcerative (chronic) proctitis with rectal bleeding
K51.212 Ulcerative (chronic) proctitis with intestinal obstruction
K51.213 Ulcerative (chronic) proctitis with fistula
K51.214 Ulcerative (chronic) proctitis with abscess
K51.218 Ulcerative (chronic) proctitis with other complication
K51.219 Ulcerative (chronic) proctitis with unspecified complications
K51.3 Ulcerative (chronic) rectosigmoiditis
K51.30 Ulcerative (chronic) rectosigmoiditis without complications
Ulcerative (chronic) rectosigmoiditis NOS
K51.31 Ulcerative (chronic) rectosigmoiditis with complications
K51.311 Ulcerative (chronic) rectosigmoiditis with rectal bleeding
K51.312 Ulcerative (chronic) rectosigmoiditis with intestinal obstruction
K51.313 Ulcerative (chronic) rectosigmoiditis with fistula
K51.314 Ulcerative (chronic) rectosigmoiditis with abscess
K51.318 Ulcerative (chronic) rectosigmoiditis with other complication
K51.319 Ulcerative (chronic) rectosigmoiditis with unspecified complications
K51.4 Inflammatory polyps of colon
Excludes2 adenomatous polyp of colon (D12.6)
polyposis of colon (D12.6)
polyps of colon NOS (K63.5)
K51.40 Inflammatory polyps of colon without complications
Inflammatory polyps of colon NOS
K51.41 Inflammatory polyps of colon with complications
K51.411 Inflammatory polyps of colon with rectal bleeding
K51.412 Inflammatory polyps of colon with intestinal obstruction
K51.413 Inflammatory polyps of colon with fistula
K51.414 Inflammatory polyps of colon with abscess
K51.418 Inflammatory polyps of colon with other complication
K51.419 Inflammatory polyps of colon with unspecified complications
K51.5 Left sided colitis
Left hemicolitis
K51.50 Left sided colitis without complications
Left sided colitis NOS
K51.51 Left sided colitis with complications
K51.511 Left sided colitis with rectal bleeding
K51.512 Left sided colitis with intestinal obstruction
K51.513 Left sided colitis with fistula
K51.514 Left sided colitis with abscess
K51.518 Left sided colitis with other complication
K51.519 Left sided colitis with unspecified complications
K51.8 Other ulcerative colitis
K51.80 Other ulcerative colitis without complications
K51.81 Other ulcerative colitis with complications
K51.811 Other ulcerative colitis with rectal bleeding
K51.812 Other ulcerative colitis with intestinal obstruction
K51.813 Other ulcerative colitis with fistula
K51.814 Other ulcerative colitis with abscess
K51.818 Other ulcerative colitis with other complication
K51.819 Other ulcerative colitis with unspecified complications
K51.9 Ulcerative colitis, unspecified
K51.90 Ulcerative colitis, unspecified, without complications
K51.91 Ulcerative colitis, unspecified, with complications
K51.911 Ulcerative colitis, unspecified with rectal bleeding
K51.912 Ulcerative colitis, unspecified with intestinal obstruction
K51.913 Ulcerative colitis, unspecified with fistula
K51.914 Ulcerative colitis, unspecified with abscess
K51.918 Ulcerative colitis, unspecified with other complication
K51.919 Ulcerative colitis, unspecified with unspecified complications
K52 Other and unspecified noninfective gastroenteritis and colitis
K52.0 Gastroenteritis and colitis due to radiation
K52.1 Toxic gastroenteritis and colitis
Drug-induced gastroenteritis and colitis
CodeFirst (T51-T65) to identify toxic agent
UseAdditionalCode code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
K52.2 Allergic and dietetic gastroenteritis and colitis
Food hypersensitivity gastroenteritis or colitis
UseAdditionalCode code to identify type of food allergy (Z91.01-, Z91.02-)
Excludes2 allergic eosinophilic colitis (K52.82)
allergic eosinophilic esophagitis (K20.0)
allergic eosinophilic gastritis (K52.81)
allergic eosinophilic gastroenteritis (K52.81)
K52.21 Food protein-induced enterocolitis syndrome
FPIES
UseAdditionalCode code for hypovolemic shock, if present (R57.1)
K52.22 Food protein-induced enteropathy
K52.29 Other allergic and dietetic gastroenteritis and colitis
Allergic proctocolitis
Food hypersensitivity gastroenteritis or colitis
Food-induced eosinophilic proctocolitis
Food protein-induced proctocolitis
Immediate gastrointestinal hypersensitivity
Milk protein-induced proctocolitis
K52.3 Indeterminate colitis
Colonic inflammatory bowel disease unclassified (IBDU)
Excludes1 unspecified colitis (K52.9)
K52.8 Other specified noninfective gastroenteritis and colitis
K52.81 Eosinophilic gastritis or gastroenteritis
Eosinophilic enteritis
Excludes2 eosinophilic esophagitis (K20.0)
K52.82 Eosinophilic colitis
Excludes2 allergic proctocolitis (K52.29)
food-induced eosinophilic proctocolitis (K52.29)
food protein-induced enterocolitis syndrome (FPIES) (K52.21)
food protein-induced proctocolitis (K52.29)
milk protein-induced proctocolitis (K52.29)
K52.83 Microscopic colitis
K52.831 Collagenous colitis
K52.832 Lymphocytic colitis
K52.838 Other microscopic colitis
K52.839 Microscopic colitis, unspecified
K52.89 Other specified noninfective gastroenteritis and colitis
K52.9 Noninfective gastroenteritis and colitis, unspecified
Colitis NOS
Enteritis NOS
Gastroenteritis NOS
Ileitis NOS
Jejunitis NOS
Sigmoiditis NOS
Excludes1 diarrhea NOS (R19.7)
functional diarrhea (K59.1)
infectious gastroenteritis and colitis NOS (A09)
neonatal diarrhea (noninfective) (P78.3)
psychogenic diarrhea (F45.8)