J45.32 Mild persistent asthma with status asthmaticus

ICD-10-CM Diagnosis Code J45.32: Mild Persistent Asthma with Status Asthmaticus

ICD-10-CM code J45.32 identifies mild persistent asthma complicated by status asthmaticus, a severe, life-threatening exacerbation involving bronchospasm unresponsive to standard therapies. This active diagnosis concept is categorized under the parent code J45.3 and is recognized in external terminology mappings. 1 2 4

Plain-language overview

Code J45.32 represents a diagnosis where a patient with mild persistent asthma experiences status asthmaticus, which is a severe, life-threatening exacerbation marked by bronchospasm that does not respond to standard bronchodilators and corticosteroids. 1 2

What this code represents

The official display label for J45.32 is mild persistent asthma with status asthmaticus, and the concept is semantically classified as a disease or syndrome within the ICD-10-CM version 2026 terminology. 1

Within the ICD-10-CM hierarchy, J45.32 is a narrower concept that falls under the parent concept J45.3, which denotes mild persistent asthma, and the terminology record for J45.32 is active. 1

Clinical context

Status asthmaticus is a medical emergency characterized by hypoxemia, hypercarbia, and secondary respiratory failure, and clinical differentiation from less severe asthma exacerbations relies on specific clinical and diagnostic features. 2

Coding details

The terminology record for J45.32 is active and possesses narrower concepts within the hierarchy, while the code is also recognized in external terminology mappings like mCode and NCI preferred terms. 1 4

Documentation considerations

Clinical literature indicates that healthcare professionals differentiate status asthmaticus from less severe asthma exacerbations based on specific clinical and diagnostic features, which informs the clinical context of this diagnosis. 2

Coverage and utilization context

The J45.32 diagnosis appears within a broader phecode mapping list that distinguishes status asthmaticus across various asthma persistence levels, including mild intermittent, moderate persistent, and severe persistent asthma categories. 3

What the sources add

While the official terminology record defines the code hierarchy and active status, the clinical literature provides operational context by describing the specific physiological emergencies and unresponsive bronchospasm defining status asthmaticus. 1 2

Comparing the sources reveals that terminology authorities establish J45.32 as an active ICD-10-CM concept, while research phenotyping tools group this exact label alongside other asthma severity subtypes for analytical mapping. 1 3 4

Sources

1. ICD-10-CM J45.32 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Phecode 495 · ExPRSweb — csg.sph.umich.edu; accessed 2026-07-27.
4. EVS Explore — evsexplore.semantics.cancer.gov; accessed 2026-07-27.