Specific code icon 2014 ICD-10-CM Diagnosis Code A09

Infectious gastroenteritis and colitis, unspecified

  • A09 is a billable ICD-10-CM code that can be used to specify a diagnosis.
  • On October 1, 2015 ICD-10-CM will replace ICD-9-CM in the United States, therefore, A09 and all other ICD-10-CM codes should only be used for training or planning purposes until then.
Clinical Information
  • A viral or bacterial infectious process affecting the large intestine.
Applicable To
  • Infectious colitis NOS
  • Infectious enteritis NOS
  • Infectious gastroenteritis NOS
Description Synonyms
  • Infectious colitis
  • Infectious diarrhea
  • Infectious diarrheal disease
  • Infectious gastroenteritis
  • Travelers diarrhea
  • Traveler's diarrhea
Type 1 Excludes
  • colitis NOS (K52.9)
  • diarrhea NOS (R19.7)
  • enteritis NOS (K52.9)
  • gastroenteritis NOS (K52.9)
  • noninfective gastroenteritis and colitis, unspecified (K52.9)
Mortality Data
  • Between 1999-2007 there were 927 deaths in the United States where ICD-10 A09 was indicated as the underlying cause of death [source: cdc.govlink to cdc.gov]
  • ICD-10 A09 as underlying cause of death data broken down by: gender, age, race, year
ICD-10-CM A09 is grouped within Diagnostic Related Group(s) (MS-DRG v30.0):
  • 391 Esophagitis, gastroent & misc digest disorders with mcc
  • 392 Esophagitis, gastroent & misc digest disorders without mcc
Convert ICD-10-CM A09 to ICD-9-CM
The following ICD-10-CM Index entries contain back-references to ICD-10-CM A09: