select2: Unable to Add Data Attribute for Custom Value with Tag

When I manually add an option to the select, I need to include a custom data attribute. How is that done? When I use AJAX to get the items, this works fine:

processResults: function (data) {
    return {
        results: $.map(data, function (obj) {
            return { 
                id: obj.Id, 
                text: obj.LastName + ', ' + obj.FirstName, 
                company: obj.Company 
            };
        })
    };
}

But I need to load these results back into the select2 as tags upon load and I can’t get the extra data property (company) added:

$.each(dtlPatients, function (index, patient) {
    $('#PatientListControl').select2().append('<option value="' + patient.Id 
           + '" data-company="' + patient.Company + '">' + patient.Name + '</option>');
});

$('#PatientListControl').val(selpatlist).trigger('change');

Am I adding the data attribute properly? Is there a better way to manually add the tags to my select2?