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J45

Non-billable

Asthma

J45 is the ICD-10-CM code for Asthma. It is a non-billable category code — use a more specific child code such as J45.2 for billing.

Status
Header (non-billable)
Chapter
J00-J99
Subcodes
5
Edition
FY2026

J00-J99 Diseases of the respiratory system

What this means — in plain language

MedlinePlus · NIH

What is 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. What causes asthma? The exact cause of asthma is unknown.…

Read more about Asthma at MedlinePlus ↗
Allergic asthma ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Includes

  • •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

  • •detergent asthma (J69.8)
  • •miner's asthma (J60)
  • •wheezing NOS (R06.2)
  • •wood asthma (J67.8)

Excludes2 — not included here

  • •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

  • •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)

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH
AsthmaCough

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code J45?
J45 is the ICD-10-CM code for "Asthma". It falls under J00-J99 Diseases of the respiratory system.
Is J45 a billable code?
No — J45 is a non-billable header code. Use a more specific child code (such as J45.2) for billing.
What are the subcodes of J45?
J45 has 5 more specific child codes, including J45.2, J45.3, J45.4.
What is excluded from J45?
Excludes1 (not coded here): detergent asthma (J69.8); miner's asthma (J60); wheezing NOS (R06.2); wood asthma (J67.8).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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