- ICD-10-CM Codes ›
- A00-B99 ›
- A00-A09 ›
- A09- ›
- 2024 ICD-10-CM Diagnosis Code A09
Infectious gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
- A09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursem*nt purposes.
- The 2024 edition of ICD-10-CM A09 became effective on October 1, 2023.
- 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
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as A09. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- colitis NOS (
ICD-10-CM Diagnosis Code K52.9
K52.9)Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- diarrhea NOS (
ICD-10-CM Diagnosis Code R19.7
R19.7)Diarrhea, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Diarrhea NOS
Type 1 Excludes
- functional diarrhea (K59.1)
- neonatal diarrhea (P78.3)
- psychogenic diarrhea (F45.8)
- enteritis NOS (
ICD-10-CM Diagnosis Code K52.9
K52.9)Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- gastroenteritis NOS (
ICD-10-CM Diagnosis Code K52.9
K52.9)Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- noninfective gastroenteritis and colitis, unspecified (
ICD-10-CM Diagnosis Code K52.9
K52.9)Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
The following code(s) above A09 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to A09:
- A00-B99
2024 ICD-10-CM Range A00-B99
Certain infectious and parasitic diseasesCertain infectious and parasitic diseases
Includes
- diseases generally recognized as communicable or transmissible
Type 1 Excludes
- certain localized infections - see body system-related chapters
Type 2 Excludes
- carrier or suspected carrier of infectious disease (Z22.-)
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use Additional
- code to identify resistance to antimicrobial drugs (Z16.-)
Approximate Synonyms
- Infectious colitis
- Infectious diarrhea
- Infectious diarrheal disease
- Infectious gastroenteritis
- Post-dysenteric arthropathy
- Post-dysenteric arthropathy of left ankle and/or foot
- Post-dysenteric arthropathy of left elbow
- Post-dysenteric arthropathy of left hand
- Post-dysenteric arthropathy of left hip
- Post-dysenteric arthropathy of left knee
- Post-dysenteric arthropathy of left shoulder
- Post-dysenteric arthropathy of left wrist
- Post-dysenteric arthropathy of vertebrae
- Post-dysenteric reactive arthropathy of multiple sites
- Postdysenteric arthritis of left ankle
- Postdysenteric arthritis of left elbow
- Postdysenteric arthritis of left hand
- Postdysenteric arthritis of left hip
- Postdysenteric arthritis of left knee
- Postdysenteric arthritis of left shoulder
- Postdysenteric arthritis of left wrist
- Postdysenteric arthritis of multiple sites
- Postdysenteric arthritis of vertebra
- Postdysenteric arthropathy
- Traveler's diarrhea
- Travelers diarrhea
Clinical Information
- A viral or bacterial infectious process affecting the large intestine.
ICD-10-CM A09 is grouped within Diagnostic Related Group(s) (MS-DRG v41.0):
- 391 Esophagitis, gastroenteritis and miscellaneous digestive disorders with mcc
- 392 Esophagitis, gastroenteritis and miscellaneous digestive disorders without mcc
Convert A09 to ICD-9-CM
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 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
- 2023 (effective 10/1/2022): No change
- 2024 (effective 10/1/2023): No change
Code annotations containing back-references to A09:
- Type 1 Excludes: K52.9
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
Diagnosis Index entries containing back-references to A09:
- Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
ICD-10-CM Diagnosis Code M19.90
Unspecified osteoarthritis, unspecified site
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Arthrosis NOS
- Arthritis NOS
- Osteoarthritis NOS
- Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) K52.9 - see also Enteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
ICD-10-CM Diagnosis Code R19.7
Diarrhea, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Diarrhea NOS
Type 1 Excludes
- functional diarrhea (K59.1)
- neonatal diarrhea (P78.3)
- psychogenic diarrhea (F45.8)
- Disease, diseased - see also Syndrome
- Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) A09
- Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Enterocolitis K52.9 - see also Enteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Gastroenteritis (acute) (chronic) (noninfectious) K52.9 - see also Enteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Gastroenteropathy K52.9 - see also Gastroenteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Ileitis (chronic) (noninfectious) K52.9 - see also Enteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Ileocolitis K52.9 - see also Enteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Sigmoiditis K52.9 - see also Enteritis
ICD-10-CM Diagnosis Code K52.9
Noninfective gastroenteritis and colitis, unspecified
- 2016 2017 2018 2019 2020 2021 2022 2023 2024 Billable/Specific Code
Applicable To
- Colitis NOS
- Enteritis NOS
- Gastroenteritis NOS
- Ileitis NOS
- Jejunitis NOS
- Sigmoiditis NOS
Type 1 Excludes
- diarrhea NOS (R19.7)
- functional diarrhea (K59.1)
- infectious gastroenteritis and colitis NOS (A09)
- neonatal diarrhea (noninfective) (P78.3)
- psychogenic diarrhea (F45.8)
- Ulcer, ulcerated, ulcerating, ulceration, ulcerative
ICD-10-CM Codes Adjacent To A09
A08.1 Acute gastroenteropathy due to Norwalk agent and other small round viruses
A08.11 Acute gastroenteropathy due to Norwalk agent
A08.19 Acute gastroenteropathy due to other small round viruses
A08.2 Adenoviral enteritis
A08.3 Other viral enteritis
A08.31 Calicivirus enteritis
A08.32 Astrovirus enteritis
A08.39 Other viral enteritis
A08.4 Viral intestinal infection, unspecified
A08.8 Other specified intestinal infections
A09 Infectious gastroenteritis and colitis, unspecified
A15 Respiratory tuberculosis
A15.0 Tuberculosis of lung
A15.4 Tuberculosis of intrathoracic lymph nodes
A15.5 Tuberculosis of larynx, trachea and bronchus
A15.6 Tuberculous pleurisy
A15.7 Primary respiratory tuberculosis
A15.8 Other respiratory tuberculosis
A15.9 Respiratory tuberculosis unspecified
A17 Tuberculosis of nervous system
A17.0 Tuberculous meningitis
Reimbursem*nt claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
