All ICD10 Codes
J45.40BillableNon-CCNo HCC

Moderate persistent asthma, uncomplicated

Diseases of the Respiratory System·Moderate persistent asthma·subcategory·FY 2027

Asthma: Asthma is a chronic (long-term) lung disease. It affects your airways, the tubes that carry air in and out of your lungs. When you have asthma, your airways can become inflamed and narrowed. This can cause wheezing, coughing, and tightness in your chest. When these symptoms get worse than usual, it is called an asthma attack or flare-up.

Read more about asthma on MedlinePlus · Source: MedlinePlus, National Library of Medicine

Also indexed as: Asthma, moderate persistent; Asthma, persistent, moderate

Instructional notes

Includes: conditions that are coded here

  • Moderate persistent asthma NOS

Also applies, from J45: Asthma

These notes sit on J45 and apply to every code under it, including J45.40.

Includes: conditions that are coded here

  • 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

Excludes1: not coded here, use a different code

Excludes2: not included here, code separately if applicable

  • asthma with chronic obstructive pulmonary disease (J44.89)
  • chronic asthmatic (obstructive) bronchitis (J44.89)
  • chronic obstructive asthma (J44.89)
  • other specified chronic obstructive pulmonary disease (J44.89)

Use additional code: add a second code for this, listed after this one

  • 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)

Also applies, from Chronic lower respiratory diseases (J40-J4B)

These notes sit on J40-J4B and apply to every code under it, including J45.40.

Excludes1: not coded here, use a different code

  • bronchitis due to chemicals, gases, fumes and vapors (J68.0)

Excludes2: not included here, code separately if applicable

  • cystic fibrosis (E84.-)

Where J45.40 sits

MS-DRGs

As the principal diagnosis, this code groups to these MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

ICD-9-CM equivalent

Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).

  • 493.00 Extrinsic asthma, unspecified (approximate)
  • 493.10 Intrinsic asthma, unspecified (approximate)
ICD-9 to ICD-10 converter