ICD-10 Code
International Classification of Diseases, 10th Revision
Sep 21, 2017

See: Infectious gastroenteritis and colitis, unspecified

  ICD-10 Code for Infectious gastroenteritis & colitis, unspecified A09

A09 is a valid1 ICD 10 diagnosis code.

A09 is valid for submission for HIPAA-covered transactions.

Chapter 1 Certain infectious and parasitic diseases (A00-B99)
Section A00-A09 Intestinal infectious diseases (A00-A09)
Category A09 Infectious gastroenteritis and colitis, unspecified

• See below for any additional coding requirements that may be necessary.

• Check for any notations, inclusions and/or exclusions that are specific to this ICD 10 code before using

1 No additional coding requirements necessary.
Inclusion Term
  • Infectious colitis NOS
  • Infectious enteritis NOS
  • Infectious gastroenteritis NOS
Excludes1
  • colitis NOS (K52.9)
  • diarrhea NOS (R19.7)
  • enteritis NOS (K52.9)
  • gastroenteritis NOS (K52.9)
  • noninfective gastroenteritis and colitis, unspecified (K52.9)
See also ICD 10 code for

Related Terms to “Infectious gastroenteritis and colitis, unspecified”

  • Arthritis, arthritic(acute) (chronic) (nonpyogenic) (subacute) - M19.90
    • in(due to)
      • enteritis, infectious NEC - A09See also category M01
  • Diarrhea, diarrheal(disease) (infantile) (inflammatory) - R19.7
    • dysenteric - A09
    • endemic - A09
    • epidemic - A09
    • infectious - A09
  • Disease, diseasedSee also Syndrome
    • diarrheal, infectious NEC - A09
  • Dysentery, dysenteric(catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) - A09
    • arthritis - A09See also category M01
  • Enteritis(acute) (diarrheal) (hemorrhagic) (noninfective) - K52.9
    • epidemic(infectious) - A09
    • infectious NOS - A09
    • septic - A09
  • Enterocolitis - K52.9See also Enteritis
    • infectious NEC - A09
  • Gastroenteritis(acute) (chronic) (noninfectious) - K52.9See also Enteritis
    • epidemic(infectious) - A09
  • Gastroenteropathy - K52.9See also Gastroenteritis
    • infectious - A09
  • Ileitis(chronic) (noninfectious) - K52.9See also Enteritis
    • infectious - A09
  • Ileocolitis - K52.9See also Enteritis
    • infectious - A09
  • Sigmoiditis - K52.9See also Enteritis
    • infectious - A09
  • Ulcer, ulcerated, ulcerating, ulceration, ulcerative
    • dysenteric - A09
Back to A09
See the 2017 ICD-10-CM Coding Guidelines.

Questions related to A09 Infectious gastroenteritis and colitis, unspecified

When ICD 10 was implemented on October 1, 2015, it did not affect physicians', outpatient facilities', and hospital outpatient departments' use of CPT codes on Medicare Fee-For-Service claims. Providers should continue to use CPT codes to report these services.