2020 ICD-10-CM Diagnosis Code A08.11

Acute gastroenteropathy due to Norwalk agent

    2016 2017 2018 2019 2020 Billable/Specific Code
  • A08.11 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM A08.11 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of A08.11 - other international versions of ICD-10 A08.11 may differ.
Applicable To
  • Acute gastroenteropathy due to Norovirus
  • Acute gastroenteropathy due to Norwalk-like agent
The following code(s) above A08.11 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 A08.11:
  • A00-B99
    2020 ICD-10-CM Range A00-B99

    Certain 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.-)
    Certain infectious and parasitic diseases
  • A08
    ICD-10-CM Diagnosis Code A08

    Viral and other specified intestinal infections

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Viral and other specified intestinal infections
Approximate Synonyms
  • Norwalk or norwalk-like virus infection
  • Viral gastroenteritis due to norwalk-like agents
ICD-10-CM A08.11 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 391 Esophagitis, gastroenteritis and miscellaneous digestive disorders with mcc
  • 392 Esophagitis, gastroenteritis and miscellaneous digestive disorders without mcc

Convert A08.11 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

Diagnosis Index entries containing back-references to A08.11:
  • Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) K52.9
    ICD-10-CM Diagnosis Code K52.9

    Noninfective gastroenteritis and colitis, unspecified

      2016 2017 2018 2019 2020 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)
    • norovirus A08.11
  • 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 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)
    • viral NEC A08.4
      ICD-10-CM Diagnosis Code A08.4

      Viral intestinal infection, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Viral enteritis NOS
      • Viral gastroenteritis NOS
      • Viral gastroenteropathy NOS
      • acute infectious A08.39
        ICD-10-CM Diagnosis Code A08.39

        Other viral enteritis

          2016 2017 2018 2019 2020 Billable/Specific Code
        Applicable To
        • Coxsackie virus enteritis
        • Echovirus enteritis
        • Enterovirus enteritis NEC
        • Torovirus enteritis
        • type Norwalk A08.11
      • Norwalk agent A08.11
  • Gastroenteropathy K52.9
    - see also Gastroenteritis
    ICD-10-CM Diagnosis Code K52.9

    Noninfective gastroenteritis and colitis, unspecified

      2016 2017 2018 2019 2020 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)
    • acute, due to Norwalk agent A08.11
    • acute, due to Norovirus A08.11

ICD-10-CM Codes Adjacent To A08.11
A07.0 Balantidiasis
A07.1 Giardiasis [lambliasis]
A07.2 Cryptosporidiosis
A07.3 Isosporiasis
A07.4 Cyclosporiasis
A07.8 Other specified protozoal intestinal diseases
A07.9 Protozoal intestinal disease, unspecified
A08 Viral and other specified intestinal infections
A08.0 Rotaviral enteritis
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

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