1. ICD-10-CM Codes
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2. A00-B99
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3. A00-A09
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4. A03-
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5. 2023 ICD-10-CM Diagnosis Code A03.9

2023 ICD-10-CM Diagnosis Code A03.9

Shigellosis, unspecified

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• A03.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM A03.9 became effective on October 1, 2022.
• This is the American ICD-10-CM version of A03.9 - other international versions of ICD-10 A03.9 may differ.

• Infection by shigella
• Shigella infection

• Dysentary caused by gram negative rod shaped enteric bacteria, most often by the genus shigella; shigella dysentery, shigellosis, is classified into subgroups according to syndrome severity and the infectious species.
• Dysentery caused by gram-negative rod-shaped enteric bacteria (enterobacteriaceae), most often by the genus shigella. Shigella dysentery, shigellosis, is classified into subgroups according to syndrome severity and the infectious species. Group a: shigella dysenteriae (severest); group b: shigella flexneri; group c: shigella boydii; and group d: shigella sonnei (mildest).

• 371 Major gastrointestinal disorders and peritoneal infections with mcc
• 372 Major gastrointestinal disorders and peritoneal infections with cc
• 373 Major gastrointestinal disorders and peritoneal infections without cc/mcc

Convert A03.9 to ICD-9-CM

• 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

• Use Additional: D59.31
  ICD-10-CM Diagnosis Code D59.31

  Infection-associated hemolytic-uremic syndrome

  2023 - New Code Billable/Specific Code

  Applicable To

  • Shiga toxin-producing E. coli [STEC] related hemolytic uremic syndrome
  • Typical hemolytic uremic syndrome

  Use Additional

  • code to identify associated infection, such as :
  • E. coli infection (B96.2-)
  • Human immunodeficiency virus [HIV] disease (B20)
  • Pneumococcal meningitis (G00.1)
  • Pneumococcal pneumonia (J13)
  • Sepsis due to Streptococcus pneumoniae (A40.3)
  • Shigella dysenteriae (A03.9)
  • Streptococcus pneumoniae as the cause of diseases classified elsewhere (B95.3)

• Chinese dysentery A03.9
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) A09
  ICD-10-CM Diagnosis Code A09

  Infectious gastroenteritis and colitis, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  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)
  • arthritis A09
    - see also category M01
    ICD-10-CM Diagnosis Code A09

    Infectious gastroenteritis and colitis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    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)
    • bacillary A03.9 - see also category M01
  • bacillary A03.9
    • Shigella A03.9
    • arthritis A03.9 - see also category M01
  • Chinese A03.9
• 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 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)
  • bacillary NOS A03.9
• Infection, infected, infective (opportunistic) B99.9
  ICD-10-CM Diagnosis Code B99.9

  Unspecified infectious disease

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Shigella A03.9
• Sepsis (generalized) (unspecified organism) A41.9
  ICD-10-CM Diagnosis Code A41.9

  Sepsis, unspecified organism

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Septicemia NOS
  • Shigella A03.9 - see also Dysentery, bacillary
• Shigellosis A03.9

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