2022 ICD-10-CM Diagnosis Code A07.9

Protozoal intestinal disease, unspecified

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • A07.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM A07.9 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of A07.9 - other international versions of ICD-10 A07.9 may differ.
Applicable To
  • Flagellate diarrhea
  • Protozoal colitis
  • Protozoal diarrhea
  • Protozoal dysentery
The following code(s) above A07.9 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 A07.9:
  • A00-B99
    2022 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
  • Protozoal intestinal disease
  • Protozoan intestinal disease
ICD-10-CM A07.9 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 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 A07.9 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
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change

Diagnosis Index entries containing back-references to A07.9:
  • 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 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)
    • protozoal A07.9
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory) R19.7
    ICD-10-CM Diagnosis Code R19.7

    Diarrhea, unspecified

      2016 2017 2018 2019 2020 2021 2022 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
    • intestine K63.9
      ICD-10-CM Diagnosis Code K63.9

      Disease of intestine, unspecified

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
      • protozoal A07.9
    • protozoal B64
      ICD-10-CM Diagnosis Code B64

      Unspecified protozoal disease

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
      • intestine, intestinal A07.9
  • 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 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)
    • protozoal A07.9
  • 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 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)
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • protozoal NEC B64
      ICD-10-CM Diagnosis Code B64

      Unspecified protozoal disease

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • flagellate, intestinal A07.9
  • Infestation B88.9
    ICD-10-CM Diagnosis Code B88.9

    Infestation, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Infestation (skin) NOS
    • Infestation by mites NOS
    • Skin parasites NOS
    • protozoal NEC B64
      ICD-10-CM Diagnosis Code B64

      Unspecified protozoal disease

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code

ICD-10-CM Codes Adjacent To A07.9
A06.82 Other amebic genitourinary infections
A06.89 Other amebic infections
A06.9 Amebiasis, unspecified
A07 Other protozoal intestinal diseases
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

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