Noninfective enteritis and colitis (K50-K52)
K50Crohn's disease [regional enteritis]
Includes: granulomatous enteritis
Use Additional Code: code to identify manifestations, such as:
› pyoderma gangrenosum (L88)
Excludes 1: ulcerative colitis (K51.-)
K50.0Crohn'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
Excludes 1: Crohn's disease of both small and large intestine (K50.8-)
K50.00Crohn's disease of small intestine without complications
K50.01Crohn's disease of small intestine with complications
K50.011Crohn's disease of small intestine with rectal bleeding
K50.012Crohn's disease of small intestine with intestinal obstruction
K50.013Crohn's disease of small intestine with fistula
K50.014Crohn's disease of small intestine with abscess
K50.018Crohn's disease of small intestine with other complication
K50.019Crohn's disease of small intestine with unspecified complications
K50.1Crohn'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
Excludes 1: Crohn's disease of both small and large intestine (K50.8)
K50.10Crohn's disease of large intestine without complications
K50.11Crohn's disease of large intestine with complications
K50.111Crohn's disease of large intestine with rectal bleeding
K50.112Crohn's disease of large intestine with intestinal obstruction
K50.113Crohn's disease of large intestine with fistula
K50.114Crohn's disease of large intestine with abscess
K50.118Crohn's disease of large intestine with other complication
K50.119Crohn's disease of large intestine with unspecified complications
K50.8Crohn's disease of both small and large intestine
K50.80Crohn's disease of both small and large intestine without complications
K50.81Crohn's disease of both small and large intestine with complications
K50.811Crohn's disease of both small and large intestine with rectal bleeding
K50.812Crohn's disease of both small and large intestine with intestinal obstruction
K50.813Crohn's disease of both small and large intestine with fistula
K50.814Crohn's disease of both small and large intestine with abscess
K50.818Crohn's disease of both small and large intestine with other complication
K50.819Crohn's disease of both small and large intestine with unspecified complications
K50.9Crohn's disease, unspecified
K50.90Crohn's disease, unspecified, without complications
› Crohn's disease NOS
› Regional enteritis NOS
K50.91Crohn's disease, unspecified, with complications
K50.911Crohn's disease, unspecified, with rectal bleeding
K50.912Crohn's disease, unspecified, with intestinal obstruction
K50.913Crohn's disease, unspecified, with fistula
K50.914Crohn's disease, unspecified, with abscess
K50.918Crohn's disease, unspecified, with other complication
K50.919Crohn's disease, unspecified, with unspecified complications
K51Ulcerative colitis
Use Additional Code: code to identify manifestations, such as:
› pyoderma gangrenosum (L88)
Excludes 1: Crohn's disease [regional enteritis] (K50.-)
K51.0Ulcerative (chronic) pancolitis
› Backwash ileitis
K51.00Ulcerative (chronic) pancolitis without complications
› Ulcerative (chronic) pancolitis NOS
K51.01Ulcerative (chronic) pancolitis with complications
K51.011Ulcerative (chronic) pancolitis with rectal bleeding
K51.012Ulcerative (chronic) pancolitis with intestinal obstruction
K51.013Ulcerative (chronic) pancolitis with fistula
K51.014Ulcerative (chronic) pancolitis with abscess
K51.018Ulcerative (chronic) pancolitis with other complication
K51.019Ulcerative (chronic) pancolitis with unspecified complications
K51.2Ulcerative (chronic) proctitis
K51.20Ulcerative (chronic) proctitis without complications
› Ulcerative (chronic) proctitis NOS
K51.21Ulcerative (chronic) proctitis with complications
K51.211Ulcerative (chronic) proctitis with rectal bleeding
K51.212Ulcerative (chronic) proctitis with intestinal obstruction
K51.213Ulcerative (chronic) proctitis with fistula
K51.214Ulcerative (chronic) proctitis with abscess
K51.218Ulcerative (chronic) proctitis with other complication
K51.219Ulcerative (chronic) proctitis with unspecified complications
K51.3Ulcerative (chronic) rectosigmoiditis
K51.30Ulcerative (chronic) rectosigmoiditis without complications
› Ulcerative (chronic) rectosigmoiditis NOS
K51.31Ulcerative (chronic) rectosigmoiditis with complications
K51.311Ulcerative (chronic) rectosigmoiditis with rectal bleeding
K51.312Ulcerative (chronic) rectosigmoiditis with intestinal obstruction
K51.313Ulcerative (chronic) rectosigmoiditis with fistula
K51.314Ulcerative (chronic) rectosigmoiditis with abscess
K51.318Ulcerative (chronic) rectosigmoiditis with other complication
K51.319Ulcerative (chronic) rectosigmoiditis with unspecified complications
K51.4Inflammatory polyps of colon
Excludes 2: adenomatous polyp of colon (D12.6)
› polyposis of colon (D12.6)
› polyps of colon NOS (K63.5)
K51.40Inflammatory polyps of colon without complications
› Inflammatory polyps of colon NOS
K51.41Inflammatory polyps of colon with complications
K51.411Inflammatory polyps of colon with rectal bleeding
K51.412Inflammatory polyps of colon with intestinal obstruction
K51.413Inflammatory polyps of colon with fistula
K51.414Inflammatory polyps of colon with abscess
K51.418Inflammatory polyps of colon with other complication
K51.419Inflammatory polyps of colon with unspecified complications
K51.5Left sided colitis
› Left hemicolitis
K51.50Left sided colitis without complications
› Left sided colitis NOS
K51.51Left sided colitis with complications
K51.511Left sided colitis with rectal bleeding
K51.512Left sided colitis with intestinal obstruction
K51.513Left sided colitis with fistula
K51.514Left sided colitis with abscess
K51.518Left sided colitis with other complication
K51.519Left sided colitis with unspecified complications
K51.8Other ulcerative colitis
K51.80Other ulcerative colitis without complications
K51.81Other ulcerative colitis with complications
K51.811Other ulcerative colitis with rectal bleeding
K51.812Other ulcerative colitis with intestinal obstruction
K51.813Other ulcerative colitis with fistula
K51.814Other ulcerative colitis with abscess
K51.818Other ulcerative colitis with other complication
K51.819Other ulcerative colitis with unspecified complications
K51.9Ulcerative colitis, unspecified
K51.90Ulcerative colitis, unspecified, without complications
K51.91Ulcerative colitis, unspecified, with complications
K51.911Ulcerative colitis, unspecified with rectal bleeding
K51.912Ulcerative colitis, unspecified with intestinal obstruction
K51.913Ulcerative colitis, unspecified with fistula
K51.914Ulcerative colitis, unspecified with abscess
K51.918Ulcerative colitis, unspecified with other complication
K51.919Ulcerative colitis, unspecified with unspecified complications
K52Other and unspecified noninfective gastroenteritis and colitis
K52.0Gastroenteritis and colitis due to radiation
K52.1Toxic gastroenteritis and colitis
› Drug-induced gastroenteritis and colitis
Code First: (T51-T65) to identify toxic agent
Use Additional Code: code for adverse effect, if applicable, to identify drug (T36-T50) with fifth or sixth character 5)
K52.2Allergic and dietetic gastroenteritis and colitis
› Food hypersensitivity gastroenteritis or colitis
Use Additional Code: code to identify type of food allergy (Z91.01-, Z91.02-)
Excludes 2: allergic eosinophilic colitis (K52.82)
› allergic eosinophilic esophagitis (K20.0)
› allergic eosinophilic gastritis (K52.81)
› allergic eosinophilic gastroenteritis (K52.81)
K52.21Food protein-induced enterocolitis syndrome
› FPIES
Use Additional Code: code for hypovolemic shock, if present (R57.1)
K52.22Food protein-induced enteropathy
K52.29Other 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
K52.3Indeterminate colitis
› Colonic inflammatory bowel disease unclassified (IBDU)
Excludes 1: unspecified colitis (K52.9)
K52.8Other specified noninfective gastroenteritis and colitis
K52.81Eosinophilic gastritis or gastroenteritis
› Eosinophilic enteritis
Excludes 2: eosinophilic esophagitis (K20.0)
K52.82Eosinophilic colitis
Excludes 2: 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)
K52.83Microscopic colitis
K52.831Collagenous colitis
K52.832Lymphocytic colitis
K52.838Other microscopic colitis
K52.839Microscopic colitis, unspecified
K52.89Other specified noninfective gastroenteritis and colitis
K52.9Noninfective gastroenteritis and colitis, unspecified
› Colitis NOS
› Enteritis NOS
› Gastroenteritis NOS
› Ileitis NOS
› Jejunitis NOS
› Sigmoiditis NOS
Excludes 1: diarrhea NOS (R19.7)
› functional diarrhea (K59.1)
› infectious gastroenteritis and colitis NOS (A09)
› neonatal diarrhea (noninfective) (P78.3)
› psychogenic diarrhea (F45.8)