List of ICD-9 codes 520–579: diseases of the digestive system

The List of ICD-9 codes 520–579: diseases of the digestive system is one of the ranges International Statistical Classification of Diseases and Related Health Problems codes.

9. Diseases of the digestive system (520–579)

Diseases of oral cavity, salivary glands, and jaws (520–529)

(520) Disorders of tooth development and eruption
- (520.0) Anodontia
- (520.1) Supernumerary teeth
- (520.2) Abnormalities of size and form of teeth
- (520.3) Mottled teeth
- (520.4) Disturbances of tooth formation
- (520.5) Hereditary disturbances in tooth structure not elsewhere classified
- (520.6) Disturbances in tooth eruption
- (520.7) Teething syndrome
(521) Diseases of hard tissues of teeth
- (521.0) Dental caries
- (521.1) Excessive attrition
- (521.2) Abrasion of teeth
- (521.3) Erosion of teeth
- (521.4) Pathological tooth resorption
- (521.5) Hypercementosis
- (521.6) Ankylosis of teeth
- (521.7) Intrinsic posteruptive color changes of teeth
- (521.8) Other specified diseases of hard tissues of teeth
  - (521.81) Cracked tooth
(522) Diseases of pulp and periapical tissues
(523) Gingival and periodontal diseases
- (523.1) Gingivitis, chronic
(524) Dentofacial anomalies, including malocclusion
- (524.0) Major anomalies of jaw size
  - (524.03) Major anomalies of jaw size maxillary hypoplasia
- (524.1) Anomalies of relationship of jaw to cranial base
- (524.2) Anomalies of dental arch relationship
- (524.3) Anomalies of tooth position of fully erupted teeth
- (524.4) Malocclusion unspecified
- (524.5) Dentofacial functional abnormalities
- (524.6) Temporomandibular joint disorders
- (524.7) Dental alveolar anomalies
- (524.8) Other specified dentofacial anomalies
(525) Other diseases and conditions of the teeth and supporting structures
(526) Diseases of the jaws
- (526.0) Developmental odontogenic cysts
- (526.1) Fissural cysts of jaw
- (526.2) Other cysts of jaws
- (526.3) Central giant cell (reparative) granuloma
- (526.4) Inflammatory conditions of jaw
- (526.5) Alveolitis of jaw
- (526.6) Periradicular pathology associated with previous endodontic treatment
- (526.8) Other specified diseases of the jaws
  - (526.81) Exostosis of jaw
(527) Diseases of the salivary glands
- (527.0) Atrophy of salivary gland
- (527.1) Hypertrophy of salivary gland
- (527.2) Sialoadenitis
- (527.3) Abscess of salivary gland
- (527.4) Fistula of salivary gland
- (527.5) Sialolithiasis
- (527.6) Mucocele of salivary gland
- (527.7) Disturbance of salivary secretion
(528) Diseases of the oral soft tissues, excluding lesions specific for gingiva and tongue
- (528.0) Stomatitis
- (528.1) Cancrum oris
- (528.2) Aphthous ulcer, Oral aphthae
- (528.3) Cellulitis and abscess of oral soft tissues
- (528.4) Cysts of oral soft tissues
- (528.5) Diseases of lips
- (528.6) Leukoplakia of oral mucosa including tongue
- (528.6) Leukoplakia, oral mucosa
- (528.7) Other disturbances of oral epithelium including tongue
  - (528.79) Erythroplakia
- (528.8) Oral submucosal fibrosis, including of tongue
- (528.9) Other and unspecified diseases of the oral soft tissues
(529) Diseases and other conditions of the tongue
- (529.0) Glossitis

Diseases of esophagus, stomach, and duodenum (530–537)

(530) Diseases of esophagus
- (530.0) Achalasia/cardiospasm
- (530.1) Esophagitis, unspec.
- (530.3) Esophageal stricture/stenosis
- (530.8) Other specified disorders of esophagus
  - (530.81) Gastroesophageal reflux, no esophagitis
  - (530.85) Barrett's esophagitis
(531) Gastric ulcer
(532) Duodenal ulcer
(533) Peptic ulcer, site unspecified
(534) Gastrojejunal ulcer
(535) Gastritis and duodenitis
- (535.0) Acute gastritis
- (535.6) Duodenitis
(536) Disorders of function of stomach
- (536.3) Gastroparesis
- (536.8) Dyspepsia
(537) Other disorders of stomach and duodenum

Appendicitis (540–543)

(540) Acute appendicitis
- (540.0) Appendicitis, acute w/ gen. peritonitis
- (540.9) Appendicitis, acute w/o peritonitis
(541) Appendicitis, unqualified
(542) Other appendicitis
(543) Other diseases of appendix

Hernia of abdominal cavity (550–553)

(550) Inguinal hernia
- (550.9) Hernia, inguinal, NOS, unilateral
(551) Other hernia of abdominal cavity, with gangrene
(552) Other hernia of abdominal cavity with obstruction, without mention
(553) Other hernia of abdominal cavity without mention of obstruction
- (553.0) Hernia, femoral, unilateral
- (553.1) Hernia, umbilical
- (553.2) Hernia, ventral, unspec.
  - (553.21) Hernia, ventral, incisional
- (553.3) Hernia, hiatal, noncongenital
- (553.9) Hernias, other, NOS

Noninfectious enteritis and colitis (555–558)

(555) Regional enteritis
- (555.0) Crohn's, small intestine
- (555.1) Crohn's, large intestine
- (555.9) Crohn's disease, NOS
(556) Idiopathic proctocolitis
- (556.9) Ulcerative colitis, unspec.
(557) Vascular insufficiency of intestine
- (557.0) Vascular insufficiency, acute, intestine
- (557.9) Ischemic bowel disease, unspec.
(558) Other noninfectious gastroenteritis and colitis
- (558.9) Gastroenteritis, noninfectious, unspec.

Other diseases of intestines and peritoneum (560–569)

(560), Intestinal obstruction without mention of hernia
- (560.1), Ileus
- (560.3), Impaction of intestine
- (560.9), Intestinal obstruction unspec
(562), Diverticula of intestine
- (562.1), Diverticulosis of colon
  - (562.11), Diverticulitis of colon, NOS
  - (562.12), Diverticulosis colon w/ hemorrhage
(564), Functional digestive disorders not elsewhere classified
- (564.0), Constipation unspec
- (564.1), Irritable bowel syndrome
- (564.2), Post-gastric-surgery syndromes
- (564.4), Postoperative functional disorders
- (564.6), Anal spasm
(565), Anal fissure and fistula
- (565.0), Anal fissure nontraumatic
(566), Abscess of anal and rectal regions
- (566.0), Abscess perianal
(567), Peritonitis
- (567.0), Peritonitis in infectious diseases classified elsewhere
- (567.1), Pneumococcal peritonitis
- (567.2), Other suppurative peritonitis
  - (567.21), Peritonitis (acute) generalized
  - (567.22), Peritoneal abscess
  - (567.23), Spontaneous bacterial peritonitis
- (567.3), Retroperitoneal infections
  - (567.31), Psoas muscle abscess
(568), Other disorders of peritoneum
- (568.0), Peritoneal adhesions
- (568.8), Other specified disorders of peritoneum
  - Pneumoperitoneum
(569), Other disorders of intestine
- (569.3), Bleeding rectal
  - (569.61), Infection colostomy/enterostomy
  - (569.62), Mechanical complication of ostomy
  - (569.85), Angiodysplasia intestine w/ hemorrhage

Other diseases of digestive system (570–579)

Developmental tooth disease/tooth abnormality (K00–K01, 520)

Quantity	Anodontia/Hypodontia Hyperdontia

Shape and size	Concrescence Fusion Gemination Dens evaginatus/Talon cusp Dens invaginatus Enamel pearl Macrodontia Microdontia Taurodontism Supernumerary roots

Formation	Dilaceration Regional odontodysplasia Turner's hypoplasia Enamel hypoplasia Ectopic enamel

Other hereditary	Amelogenesis imperfecta Dentinogenesis imperfecta Dentin dysplasia Regional odontodysplasia

Other	Dental fluorosis Tooth impaction

Acquired tooth disease (K02–K05, 521–525)

Hard tissues

Pulp/periapical (Endodontal)

Pulpal	External resorption Internal resorption Irreversible pulpitis Reversible pulpitis Pulp necrosis Pink tooth of Mummery

Periapical	Acute apical periodontitis Chronic apical periodontitis Combined periodontic-endodontic lesions Fistula Periapical abscess Phoenix abscess Vertical root fracture

Ungrouped	Pulpitis Radicular cyst Periapical abscess

Gingiva/periodontal
(Periodontal)

Bone cyst

Other

Cracked tooth syndrome

To be grouped
from periodontology

Diagnoses	Chronic periodontitis Localized aggressive periodontitis Generalized aggressive periodontitis Periodontitis as a manifestation of systemic disease Necrotizing periodontal diseases Abscesses of the periodontium Combined periodontic-endodontic lesions

Pathogenesis	A. actinomycetemcomitans Capnocytophaga sp. F. nucleatum P. gingivalis P. intermedia T. forsythia T. denticola

Pathologic entities	Calculus Edentulism Fremitus Furcation defect Gingival enlargement Gingival pocket Gingivitis Horizontal bony defect Linear gingival erythema Occlusal trauma Periodontal pocket Periodontal disease Periodontitis Plaque Recession Vertical bony defect

Dental disease involving the jaw (K07–K10, 524–526)

General	Jaw abnormality malocclusion Orthodontics Gnathitis

Size	Micrognathism Maxillary hypoplasia

Maxilla and Mandible	Cherubism Congenital epulis Torus mandibularis Torus palatinus

Other	Jaw and base of cranium Prognathism Retrognathism Dental arch Crossbite Overbite Temporomandibular joint disorder

Oral and maxillofacial pathology (K00–K06, K11–K14, 520–525, 527–529)

Lips

Cheilitis Actinic Angular Plasma cell Cleft lip Congenital lip pit Eclabium Herpes labialis Macrocheilia Microcheilia Nasolabial cyst Sun poisoning Trumpeter's wart

Tongue

Ankyloglossia Black hairy tongue Caviar tongue Crenated tongue Cunnilingus tongue Fissured tongue Foliate papillitis Glossitis Geographic tongue Median rhomboid glossitis Transient lingual papillitis Glossoptosis Hypoglossia Lingual thyroid Macroglossia Microglossia Rhabdomyoma

Palate

Bednar's aphthae Cleft palate High-arched palate Palatal cysts of the newborn Inflammatory papillary hyperplasia Stomatitis nicotina Torus palatinus

Oral mucosa - Lining of mouth

Teeth (pulp, dentin, enamel)

Periodontium (gingiva, periodontal ligament, cementum, alveolus) - Gums and tooth-supporting structures

Periapaical, mandibular and maxillary hard tissues - Bones of jaws

Temporomandibular joints, muscles of mastication and malocclusions - Jaw joints, chewing muscles and bite abnormalities

Bruxism Condylar resorption Mandibular dislocation Malocclusion Crossbite Open bite Overbite Overjet Prognathia Retrognathia Temporomandibular joint dysfunction

Salivary glands

Orofacial soft tissues - Soft tissues around the mouth

Actinomycosis Angioedema Basal cell carcinoma Cutaneous sinus of dental origin Cystic hygroma Gnathophyma Ludwig's angina Macrostomia Melkersson–Rosenthal syndrome Microstomia Noma Oral Crohn's disease Orofacial granulomatosis Perioral dermatitis Pyostomatitis vegetans

Other

Eagle syndrome Hemifacial hypertrophy Facial hemiatrophy Oral manifestations of systemic disease

Diseases of the digestive system (primarily K20–K93, 530–579)

Upper GI tract

Esophagus	Esophagitis Candidal Eosinophilic Herpetiform Rupture Boerhaave syndrome Mallory-Weiss syndrome UES Zenker's diverticulum LES Barrett's esophagus Esophageal motility disorder Nutcracker esophagus Achalasia Diffuse esophageal spasm Gastroesophageal reflux disease (GERD) Laryngopharyngeal reflux (LPR) Esophageal stricture Megaesophagus

Stomach	Gastritis Atrophic Ménétrier's disease Gastroenteritis Peptic (gastric) ulcer Cushing ulcer Dieulafoy's lesion Dyspepsia Pyloric stenosis Achlorhydria Gastroparesis Gastroptosis Portal hypertensive gastropathy Gastric antral vascular ectasia Gastric dumping syndrome Gastric volvulus

Lower GI tract:
Intestinal/
Enteropathy

Small intestine (Duodenum/Jejunum/Ileum)	Enteritis Duodenitis Jejunitis Ileitis Peptic (duodenal) ulcer Curling's ulcer Malabsorption: Coeliac Tropical sprue Blind loop syndrome Small bowel bacterial overgrowth syndrome Whipple's Short bowel syndrome Steatorrhea Milroy disease Bile acid malabsorption

Large intestine (Appendix/Colon)	Appendicitis Colitis Pseudomembranous Ulcerative Ischemic Microscopic Collagenous Lymphocytic Functional colonic disease IBS Intestinal pseudoobstruction / Ogilvie syndrome Megacolon / Toxic megacolon Diverticulitis/Diverticulosis

Large and/or small	Enterocolitis Necrotizing Gastroenterocolitis IBD Crohn's disease Vascular: Abdominal angina Mesenteric ischemia Angiodysplasia Bowel obstruction: Ileus Intussusception Volvulus Fecal impaction Constipation Diarrhea Infectious Intestinal adhesions

Rectum	Proctitis Radiation proctitis Proctalgia fugax Rectal prolapse Anismus

Anal canal	Anal fissure/Anal fistula Anal abscess Anal dysplasia Pruritus ani

GI bleeding/BIS

Accessory

Liver	Hepatitis Viral hepatitis Autoimmune hepatitis Alcoholic hepatitis Cirrhosis PBC Fatty liver NASH Vascular Budd-Chiari syndrome Hepatic veno-occlusive disease Portal hypertension Nutmeg liver Alcoholic liver disease Liver failure Hepatic encephalopathy Acute liver failure Liver abscess Pyogenic Amoebic Hepatorenal syndrome Peliosis hepatis Metabolic disorders Wilson's disease Hemochromatosis

Gallbladder	Cholecystitis Gallstones/Cholecystolithiasis Cholesterolosis Rokitansky-Aschoff sinuses Postcholecystectomy syndrome Porcelain gallbladder

Bile duct/ Other biliary tree	Cholangitis Primary sclerosing cholangitis Secondary sclerosing cholangitis Ascending Cholestasis/Mirizzi's syndrome Biliary fistula Haemobilia Gallstones/Cholelithiasis Common bile duct Choledocholithiasis Biliary dyskinesia Sphincter of Oddi dysfunction

Pancreatic	Pancreatitis Acute Chronic Hereditary Pancreatic abscess Pancreatic pseudocyst Exocrine pancreatic insufficiency Pancreatic fistula

Abdominopelvic

Hernia	Diaphragmatic Congenital Hiatus Inguinal Indirect Direct Umbilical Femoral Obturator Spigelian Lumbar Petit's Grynfeltt-Lesshaft Undefined location Incisional Internal hernia Richter's

Peritoneal	Peritonitis Spontaneous bacterial peritonitis Hemoperitoneum Pneumoperitoneum

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