Infectious gastroenteritis and colitis, unspecified A09

  • A09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM A09 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of A09 - other international versions of ICD-10 A09 may differ.
Applicable To:
  • Infectious colitis NOS
  • Infectious enteritis NOS
  • Infectious gastroenteritis NOS
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)

Codes: = Billable

  • A09 Infectious gastroenteritis and colitis, unspecified

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.