1. ICD-10-CM Codes
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2. A00-B99 Certain infectious and parasitic diseases
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3. A20-A28 Certain zoonotic bacterial diseases
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4. A22- Anthrax
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5. 2021 ICD-10-CM Diagnosis Code A22.2

2021 ICD-10-CM Diagnosis Code A22.2

Gastrointestinal anthrax

2016 2017 2018 2019 2020 2021 Billable/Specific Code

• A22.2 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2021 edition of ICD-10-CM A22.2 became effective on October 1, 2020.
• This is the American ICD-10-CM version of A22.2 - other international versions of ICD-10 A22.2 may differ.

• 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 A22.2 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

• Anthrax A22.9
  ICD-10-CM Diagnosis Code A22.9

  Anthrax, unspecified

  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • colitis A22.2
  • gastrointestinal A22.2
  • intestinal A22.2
• 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 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)
  • anthrax A22.2

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