```xml
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns4:query_definition xmlns:ns2="http://www.i2b2.org/xsd/cell/crc/psm/1.1/" xmlns:ns4="http://www.i2b2.org/xsd/cell/crc/psm/querydefinition/1.1/" xmlns:ns3="http://www.i2b2.org/xsd/cell/crc/psm/analysisdefinition/1.1/">
    <query_name>Esophageal refl@16:11:21</query_name>
    <query_timing>ANY</query_timing>
    <specificity_scale>0</specificity_scale>
    <panel>
        <panel_number>1</panel_number>
        <panel_timing>ANY</panel_timing>
        <panel_accuracy_scale>100</panel_accuracy_scale>
        <invert>0</invert>
        <total_item_occurrences>1</total_item_occurrences>
        <item>
            <hlevel>5</hlevel>
            <item_name>Esophageal reflux</item_name>
            <item_key>\\i2b2_DIAG\i2b2\Diagnoses\Digestive system (520-579)\(530) Diseases of esophagus\(530-8) Other specified disorders~\(530-81) Esophageal reflux\</item_key>
            <item_icon>FA</item_icon>
            <tooltip>Diagnoses \ Digestive system \ Diseases of esophagus \ Other specified disorders of esophagus \ Esophageal reflux</tooltip>
            <class>ENC</class>
            <item_is_synonym>true</item_is_synonym>
        </item>
    </panel>
</ns4:query_definition>

```

I want to find patients with a diagnosis of Esophageal reflux in the ICD-10-CM code range 530.81, which falls under the category of Other specified disorders of the esophagus within the Diseases of the esophagus in the Digestive system section of the ICD-10-CM classification system. This query will search for patients with this specific diagnosis at any time during their medical history, and the specificity scale is set to 0, meaning it will include all patients with this diagnosis regardless of how specific the diagnosis is. The panel accuracy scale is set to 100, indicating a high level of accuracy for this particular panel. This query is part of a larger panel, with a total of one item in the panel and the hierarchical level set to 5. The icon used for this item is FA, and the tooltip provided is "Diagnoses > Digestive system > Diseases of esophagus > Other specified disorders of esophagus > Esophageal reflux." The item is also considered a synonym, meaning it may have alternative