- A09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2024 edition of ICD-10-CM A09 became effective on October 1, 2022.
- This is the American ICD-10-CM version of A09 – other international versions of ICD-10 A09 may differ.
ICD-10-CM A09 is grouped within Diagnostic Related Group(s):
- 391 Esophagitis, gastroenteritis and miscellaneous digestive disorders with mcc
- 392 Esophagitis, gastroenteritis and miscellaneous digestive disorders without mcc
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)
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2016 (effective 10/1/2015): No change
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2024 (effective 10/1/2022): No change
Diagnosis Index entries containing back-references to A09:
- enteritis, infectious NEC > in (due to) E22.0
- regional > Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) K52.9
- infectious > regional A09
- dysenteric > Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
- endemic > Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
- epidemic > Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
- infectious > Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
- diarrheal, infectious NEC > Disease, diseased
- arthritis > Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) A09
- epidemic (infectious) > Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
- infectious NOS > Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
- septic > Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
- infectious NEC > Enterocolitis K52.9
- epidemic (infectious) > Gastroenteritis (acute) (chronic) (noninfectious) K52.9
- infectious > Gastroenteropathy K52.9
- infectious > Ileitis (chronic) (noninfectious) K52.9
- infectious > Ileocolitis K52.9
- infectious > Sigmoiditis K52.9
- dysenteric > Ulcer, ulcerated, ulcerating, ulceration, ulcerative