Chapter 11: Diseases of the digestive system (K00–K95)
176 diagnoses listed as covered by Medicare billing and coding articles for HCPCS Level II codes. All chapters.
K11: Diseases of salivary glands
- K11.7 — Disturbances of salivary secretion
K22: Other diseases of esophagus
- K22.0 — Achalasia of cardia
K35: Acute appendicitis
- K35.200 — Acute appendicitis with generalized peritonitis, without perforation…
- K35.201 — Acute appendicitis with generalized peritonitis, with perforation…
- K35.209 — Acute appendicitis with generalized peritonitis, without abscess…
- K35.210 — Acute appendicitis with generalized peritonitis, without…
- K35.211 — Acute appendicitis with generalized peritonitis, with perforation…
- K35.219 — Acute appendicitis with generalized peritonitis, with abscess…
K50: Crohn's disease [regional enteritis]
- K50.00 — Crohn's disease of small intestine without 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
- K50.10 — Crohn's disease of large intestine without 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
- K50.80 — Crohn's disease of both small and large intestine without…
- 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…
- 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…
- K50.819 — Crohn's disease of both small and large intestine with unspecified…
- K50.90 — Crohn's disease, unspecified, without 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
- K51.00 — Ulcerative (chronic) pancolitis without 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
- K51.20 — Ulcerative (chronic) proctitis without 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
- K51.30 — Ulcerative (chronic) rectosigmoiditis without 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
- K51.40 — Inflammatory polyps of colon without 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
- K51.50 — Left sided colitis without 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
- K51.80 — Other ulcerative colitis without 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
- K51.90 — Ulcerative colitis, unspecified, without 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
- K52.89 — Other specified noninfective gastroenteritis and colitis
K55: Vascular disorders of intestine
- K55.011 — Focal (segmental) acute (reversible) ischemia of small intestine
- K55.012 — Diffuse acute (reversible) ischemia of small intestine
- K55.019 — Acute (reversible) ischemia of small intestine, extent unspecified
- K55.021 — Focal (segmental) acute infarction of small intestine
- K55.022 — Diffuse acute infarction of small intestine
- K55.029 — Acute infarction of small intestine, extent unspecified
- K55.031 — Focal (segmental) acute (reversible) ischemia of large intestine
- K55.032 — Diffuse acute (reversible) ischemia of large intestine
- K55.039 — Acute (reversible) ischemia of large intestine, extent unspecified
- K55.041 — Focal (segmental) acute infarction of large intestine
- K55.042 — Diffuse acute infarction of large intestine
- K55.049 — Acute infarction of large intestine, extent unspecified
- K55.051 — Focal (segmental) acute (reversible) ischemia of intestine, part…
- K55.052 — Diffuse acute (reversible) ischemia of intestine, part unspecified
- K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified
- K55.061 — Focal (segmental) acute infarction of intestine, part unspecified
- K55.062 — Diffuse acute infarction of intestine, part unspecified
- K55.069 — Acute infarction of intestine, part and extent unspecified
- K55.1 — Chronic vascular disorders of intestine
- K55.21 — Angiodysplasia of colon with hemorrhage
- K55.30 — Necrotizing enterocolitis, unspecified
- K55.31 — Stage 1 necrotizing enterocolitis
- K55.32 — Stage 2 necrotizing enterocolitis
- K55.33 — Stage 3 necrotizing enterocolitis
K56: Paralytic ileus and intestinal obstruction without hernia
K60: Fissure and fistula of anal and rectal regions
- K60.0 — Acute anal fissure
- K60.1 — Chronic anal fissure
- K60.2 — Anal fissure, unspecified
- K60.30 — Anal fistula, unspecified
- K60.311 — Anal fistula, simple, initial
- K60.312 — Anal fistula, simple, persistent
- K60.313 — Anal fistula, simple, recurrent
- K60.319 — Anal fistula, simple, unspecified
- K60.321 — Anal fistula, complex, initial
- K60.322 — Anal fistula, complex, persistent
- K60.323 — Anal fistula, complex, recurrent
- K60.329 — Anal fistula, complex, unspecified
- K60.40 — Rectal fistula, unspecified
- K60.411 — Rectal fistula, simple, initial
- K60.412 — Rectal fistula, simple, persistent
- K60.413 — Rectal fistula, simple, recurrent
- K60.419 — Rectal fistula, simple, unspecified
- K60.421 — Rectal fistula, complex, initial
- K60.422 — Rectal fistula, complex, persistent
- K60.423 — Rectal fistula, complex, recurrent
- K60.429 — Rectal fistula, complex, unspecified
- K60.50 — Anorectal fistula, unspecified
- K60.511 — Anorectal fistula, simple, initial
- K60.512 — Anorectal fistula, simple, persistent
- K60.513 — Anorectal fistula, simple, recurrent
- K60.519 — Anorectal fistula, simple, unspecified
- K60.521 — Anorectal fistula, complex, initial
- K60.522 — Anorectal fistula, complex, persistent
- K60.523 — Anorectal fistula, complex, recurrent
- K60.529 — Anorectal fistula, complex, unspecified
K62: Other diseases of anus and rectum
- K62.7 — Radiation proctitis
K63: Other diseases of intestine
- K63.8211 — Small intestinal bacterial overgrowth, hydrogen-subtype
- K63.8212 — Small intestinal bacterial overgrowth, hydrogen sulfide-subtype
- K63.8219 — Small intestinal bacterial overgrowth, unspecified
- K63.822 — Small intestinal fungal overgrowth
- K63.829 — Intestinal methanogen overgrowth, unspecified
K68: Disorders of retroperitoneum
- K68.11 — Postprocedural retroperitoneal abscess
K72: Hepatic failure, not elsewhere classified
- K72.11 — Chronic hepatic failure with coma
- K72.91 — Hepatic failure, unspecified with coma
K76: Other diseases of liver
- K76.7 — Hepatorenal syndrome
- K76.81 — Hepatopulmonary syndrome
K86: Other diseases of pancreas
- K86.0 — Alcohol-induced chronic pancreatitis
- K86.1 — Other chronic pancreatitis
K90: Intestinal malabsorption
- K90.0 — Celiac disease
- K90.1 — Tropical sprue
- K90.2 — Blind loop syndrome, not elsewhere classified
- K90.3 — Pancreatic steatorrhea
- K90.49 — Malabsorption due to intolerance, not elsewhere classified
- K90.821 — Short bowel syndrome with colon in continuity
- K90.822 — Short bowel syndrome without colon in continuity
- K90.83 — Intestinal failure
- K90.89 — Other intestinal malabsorption
- K90.9 — Intestinal malabsorption, unspecified
K91: Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
- K91.2 — Postsurgical malabsorption, not elsewhere classified
- K91.30 — Postprocedural intestinal obstruction, unspecified as to partial…
- K91.31 — Postprocedural partial intestinal obstruction
- K91.32 — Postprocedural complete intestinal obstruction
- K91.870 — Postprocedural hematoma of a digestive system organ or structure…
- K91.871 — Postprocedural hematoma of a digestive system organ or structure…
- K91.872 — Postprocedural seroma of a digestive system organ or structure…
- K91.873 — Postprocedural seroma of a digestive system organ or structure…
K92: Other diseases of digestive system
- K92.1 — Melena
- K92.2 — Gastrointestinal hemorrhage, unspecified