2022 ICD-10-CM Diagnosis Code A70

Chlamydia psittaci infections

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • A70 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 A70 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of A70 - other international versions of ICD-10 A70 may differ.
Applicable To
  • Ornithosis
  • Parrot fever
  • Psittacosis
The following code(s) above A70 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 A70:
  • 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
  • A70-A74
    2022 ICD-10-CM Range A70-A74

    Other diseases caused by chlamydiae

    Type 1 Excludes
    • sexually transmitted chlamydial diseases (A55-A56)
    Other diseases caused by chlamydiae
Approximate Synonyms
  • Ornithosis
  • Psittacosis
Clinical Information
  • A bacterial infection caused by chlamydia psittaci. Humans are infected by handling sick birds. The chlamydia cause respiratory infection manifested with fever, malaise, cough, dyspnea, sore throat, photophobia and headaches.
  • Infection with chlamydophila psittaci (formerly chlamydia psittaci), transmitted to humans by inhalation of dust-borne contaminated nasal secretions or excreta of infected birds. This infection results in a febrile illness characterized by pneumonitis and systemic manifestations.
ICD-10-CM A70 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 865 Viral illness with mcc
  • 866 Viral illness without mcc

Convert A70 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
Code annotations containing back-references to A70:
  • Type 1 Excludes: J16
    ICD-10-CM Diagnosis Code J16

    Pneumonia due to other infectious organisms, not elsewhere classified

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Code First
    Code Also
    • associated abscess, if applicable (J85.1)
    Type 1 Excludes
    • congenital pneumonia (P23.-)
    • ornithosis (A70)
    • pneumocystosis (B59)
    • pneumonia NOS (J18.9)

Diagnosis Index entries containing back-references to A70:
  • Chlamydia, chlamydial A74.9
    ICD-10-CM Diagnosis Code A74.9

    Chlamydial infection, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Chlamydiosis NOS
    • psittaci A70 (infection)
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
    ICD-10-CM Diagnosis Code R50.9

    Fever, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Fever NOS
    • Fever of unknown origin [FUO]
    • Fever with chills
    • Fever with rigors
    • Hyperpyrexia NOS
    • Persistent fever
    • Pyrexia NOS
    • parrot A70
  • 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
    • Chlamydia, chlamydial A74.9
      ICD-10-CM Diagnosis Code A74.9

      Chlamydial infection, unspecified

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
      Applicable To
      • Chlamydiosis NOS
      • psittaci A70
  • Ornithosis A70
  • Parrot fever A70
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) J18.9
    ICD-10-CM Diagnosis Code J18.9

    Pneumonia, unspecified organism

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    • in (due to)
      • ornithosis A70
      • psittacosis A70
    • psittacosis A70
  • Psittacosis A70

ICD-10-CM Codes Adjacent To A70
A69.0 Necrotizing ulcerative stomatitis
A69.1 Other Vincent's infections
A69.2 Lyme disease
A69.20 …… unspecified
A69.21 Meningitis due to Lyme disease
A69.22 Other neurologic disorders in Lyme disease
A69.23 Arthritis due to Lyme disease
A69.29 Other conditions associated with Lyme disease
A69.8 Other specified spirochetal infections
A69.9 Spirochetal infection, unspecified
A70 Chlamydia psittaci infections
A71 Trachoma
A71.0 Initial stage of trachoma
A71.1 Active stage of trachoma
A71.9 Trachoma, unspecified
A74 Other diseases caused by chlamydiae
A74.0 Chlamydial conjunctivitis
A74.8 Other chlamydial diseases
A74.81 Chlamydial peritonitis
A74.89 Other chlamydial diseases
A74.9 Chlamydial infection, unspecified

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