ICD-10 Code D72.119 – Hypereosinophilic syndrome [HES], unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D72.119 – Hypereosinophilic syndrome [HES], unspecified
What it is
D72.119 identifies hypereosinophilic syndrome when the record does not specify a subtype. It describes a disorder marked by persistent eosinophilia with organ involvement or concern for eosinophil-related damage.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include unexplained eosinophilia, allergic or inflammatory symptoms, and evidence of organ involvement such as skin, lung, heart, or gastrointestinal disease.
When to use this code
Use this code when the provider documents hypereosinophilic syndrome but does not identify a more specific form. It also fits when the chart supports HES and the note remains nonspecific. If the record names a secondary cause or another eosinophilic disorder, code that condition instead.
Do not use for
Do not use D72.119 for isolated eosinophilia without a diagnosis of hypereosinophilic syndrome. Do not use it when documentation supports a different specified eosinophilic disorder or a clearly identified underlying cause.
Coding tip
Query the provider if the note says eosinophilia or HES but does not clearly state the diagnosis or specificity.