2021 ICD-10-CM Codes for Asthma (J45)

Instructional Notations

Includes Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.

  • allergic (predominantly) asthma
  • allergic bronchitis NOS
  • allergic rhinitis with asthma
  • atopic asthma
  • extrinsic allergic asthma
  • hay fever with asthma
  • idiosyncratic asthma
  • intrinsic nonallergic asthma
  • nonallergic asthma

Use Additional Code Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.

  • code to identify:
  • eosinophilic asthma J82.83
  • 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

Type 1 Excludes Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Type 2 Excludes Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

  • asthma with chronic obstructive pulmonary disease J44.9
  • chronic asthmatic obstructive bronchitis J44.9
  • chronic obstructive asthma J44.9
    • ICD-10 Index

      • Diseases of the respiratory system (J00–J99)

        • Chronic lower respiratory diseases (J40-J47)

            • Asthma (J45)
            • J45 - Asthma NON-BILLABLE CODE
            • J45.2 - Mild intermittent asthma NON-BILLABLE CODE
            • J45.20 - Mild intermittent asthma, uncomplicated BILLABLE CODE
            • J45.21 - Mild intermittent asthma with (acute) exacerbation BILLABLE CODE
            • J45.22 - Mild intermittent asthma with status asthmaticus BILLABLE CODE
            • J45.3 - Mild persistent asthma NON-BILLABLE CODE
            • J45.30 - Mild persistent asthma, uncomplicated BILLABLE CODE
            • J45.31 - Mild persistent asthma with (acute) exacerbation BILLABLE CODE
            • J45.32 - Mild persistent asthma with status asthmaticus BILLABLE CODE
            • J45.4 - Moderate persistent asthma NON-BILLABLE CODE
            • J45.40 - Moderate persistent asthma, uncomplicated BILLABLE CODE
            • J45.41 - Moderate persistent asthma with (acute) exacerbation BILLABLE CODE
            • J45.42 - Moderate persistent asthma with status asthmaticus BILLABLE CODE
            • J45.5 - Severe persistent asthma NON-BILLABLE CODE
            • J45.50 - Severe persistent asthma, uncomplicated BILLABLE CODE
            • J45.51 - Severe persistent asthma with (acute) exacerbation BILLABLE CODE
            • J45.52 - Severe persistent asthma with status asthmaticus BILLABLE CODE
            • J45.9 - Other and unspecified asthma NON-BILLABLE CODE
            • J45.90 - Unspecified asthma NON-BILLABLE CODE
            • J45.901 - Unspecified asthma with (acute) exacerbation BILLABLE CODE
            • J45.902 - Unspecified asthma with status asthmaticus BILLABLE CODE
            • J45.909 - Unspecified asthma, uncomplicated BILLABLE CODE
            • J45.99 - Other asthma NON-BILLABLE CODE
            • J45.990 - Exercise induced bronchospasm BILLABLE CODE
            • J45.991 - Cough variant asthma BILLABLE CODE
            • J45.998 - Other asthma BILLABLE CODE