2020 ICD-10-CM Diagnosis Code A03.9

Shigellosis, unspecified

    2016 2017 2018 2019 2020 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 2020 edition of ICD-10-CM A03.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of A03.9 - other international versions of ICD-10 A03.9 may differ.
Applicable To
  • Bacillary dysentery NOS
The following code(s) above A03.9 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 A03.9:
  • 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
Approximate Synonyms
  • Infection by shigella
  • Shigella infection
Clinical Information
  • 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).
ICD-10-CM A03.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 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

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
Code annotations containing back-references to A03.9:
  • Use Additional: D59.3
    ICD-10-CM Diagnosis Code D59.3

    Hemolytic-uremic syndrome

      2016 2017 2018 2019 2020 Billable/Specific Code
    Use Additional
    • code to identify associated:
    • E. coli infection (B96.2-)
    • Pneumococcal pneumonia (J13)
    • Shigella dysenteriae (A03.9)

Diagnosis Index entries containing back-references to A03.9:
  • 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 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 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 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 Billable/Specific Code
  • Sepsis (generalized) (unspecified organism) A41.9
    ICD-10-CM Diagnosis Code A41.9

    Sepsis, unspecified organism

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Septicemia NOS
  • Shigellosis A03.9

ICD-10-CM Codes Adjacent To A03.9
A02.25 Salmonella pyelonephritis
A02.29 Salmonella with other localized infection
A02.8 Other specified salmonella infections
A02.9 Salmonella infection, unspecified
A03 Shigellosis
A03.0 Shigellosis due to Shigella dysenteriae
A03.1 Shigellosis due to Shigella flexneri
A03.2 Shigellosis due to Shigella boydii
A03.3 Shigellosis due to Shigella sonnei
A03.8 Other shigellosis
A03.9 Shigellosis, unspecified
A04 Other bacterial intestinal infections
A04.0 Enteropathogenic Escherichia coli infection
A04.1 Enterotoxigenic Escherichia coli infection
A04.2 Enteroinvasive Escherichia coli infection
A04.3 Enterohemorrhagic Escherichia coli infection
A04.4 Other intestinal Escherichia coli infections
A04.5 Campylobacter enteritis
A04.6 Enteritis due to Yersinia enterocolitica
A04.7 Enterocolitis due to Clostridium difficile
A04.71 …… recurrent

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