ICD-10 Code D72.1 – Eosinophilia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D72.1 – Eosinophilia
What it is
Eosinophilia means an increased number of eosinophils in the blood or tissues. It is a finding, not a final diagnosis, and often reflects an underlying allergic, infectious, inflammatory, or hematologic condition.
Clinical signs
Clinical features vary; refer to documentation. Patients may have no symptoms, or they may show findings related to the underlying cause, such as allergy-type complaints, rash, respiratory issues, or organ involvement.
When to use this code
Use D72.1 when the provider documents eosinophilia as a diagnosis or clinically significant finding. It is appropriate when the record identifies elevated eosinophils without a more specific coded condition explaining the result.
Code it when eosinophilia is the focus of evaluation, monitoring, or assessment. If the provider links it to a specific disorder, code that condition instead and follow documentation guidance.
Do not use for
Do not use this code for a routine lab abnormality that is not documented as clinically relevant. Do not use it when a more specific diagnosis, such as an allergic or parasitic condition, explains the eosinophilia.
Coding tip
Check the provider’s assessment for a documented cause before assigning D72.1.