2023

  1. ICD-10-CM Codes
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  2. J00-J99
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  3. J20-J22
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  4. J21-
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  5. 2023 ICD-10-CM Diagnosis Code J21.9

2023 ICD-10-CM Diagnosis Code J21.9

Acute bronchiolitis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • J21.9 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 J21.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of J21.9 - other international versions of ICD-10 J21.9 may differ.
Applicable To
  • Bronchiolitis (acute)
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as J21.9. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • chronic bronchiolitis (
    ICD-10-CM Diagnosis Code J44
    • J44 Other chronic obstructive pulmonary disease
      • J44.0 Chronic obstructive pulmonary disease with (a...
      • J44.1 Chronic obstructive pulmonary disease with (a...
      • J44.9 Chronic obstructive pulmonary disease, unspec...
    J44.-
    )
The following code(s) above J21.9 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 J21.9:
  • J00-J99
    2023 ICD-10-CM Range J00-J99

    Diseases of the respiratory system

    Note
    • When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g. tracheobronchitis to bronchitis in J40).
    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • smoke inhalation (T59.81-)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Use Additional
    • code, where applicable, to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • exposure to tobacco smoke in the perinatal period (P96.81)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    Diseases of the respiratory system
  • J20-J22
    2023 ICD-10-CM Range J20-J22

    Other acute lower respiratory infections

    Type 2 Excludes
    • chronic obstructive pulmonary disease with acute lower respiratory infection (J44.0)
    Other acute lower respiratory infections
  • J21
    ICD-10-CM Diagnosis Code J21

    Acute bronchiolitis

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Includes
    • acute bronchiolitis with bronchospasm
    Type 2 Excludes
    • respiratory bronchiolitis interstitial lung disease (J84.115)
    Acute bronchiolitis
Approximate Synonyms
  • Bronchiolitis
ICD-10-CM J21.9 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 202 Bronchitis and asthma with cc/mcc
  • 203 Bronchitis and asthma without cc/mcc

Convert J21.9 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
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to J21.9:
  • Bronchiolitis (acute) (infective) (subacute) J21.9
    • with
      • bronchospasm or obstruction J21.9
  • Bronchospasm (acute) J98.01
    ICD-10-CM Diagnosis Code J98.01

    Acute bronchospasm

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Type 1 Excludes
    • acute bronchiolitis with bronchospasm (J21.-)
    • acute bronchitis with bronchospasm (J20.-)
    • asthma (J45.-)
    • exercise induced bronchospasm (J45.990)
    • with
      • bronchiolitis, acute J21.9

ICD-10-CM Codes Adjacent To J21.9
J20.4 Acute bronchitis due to parainfluenza virus
J20.5 Acute bronchitis due to respiratory syncytial virus
J20.6 Acute bronchitis due to rhinovirus
J20.7 Acute bronchitis due to echovirus
J20.8 Acute bronchitis due to other specified organisms
J20.9 Acute bronchitis, unspecified
J21 Acute bronchiolitis
J21.0 Acute bronchiolitis due to respiratory syncytial virus
J21.1 Acute bronchiolitis due to human metapneumovirus
J21.8 Acute bronchiolitis due to other specified organisms
J21.9 Acute bronchiolitis, unspecified
J22 Unspecified acute lower respiratory infection
J30 Vasomotor and allergic rhinitis
J30.0 Vasomotor rhinitis
J30.1 Allergic rhinitis due to pollen
J30.2 Other seasonal allergic rhinitis
J30.5 Allergic rhinitis due to food
J30.8 Other allergic rhinitis
J30.81 Allergic rhinitis due to animal (cat) (dog) hair and dander
J30.89 Other allergic rhinitis
J30.9 Allergic rhinitis, unspecified

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

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