diff --git a/lab_domicilios.php b/lab_domicilios.php
index ddfb3c0..92f50e7 100644
--- a/lab_domicilios.php
+++ b/lab_domicilios.php
@@ -1614,10 +1614,16 @@ async function ffExportarExcel() {
             ...fieldCols.map(([l,d])=>{ const v=todos[lmap.get(l)||d]; return v==null?'':(Array.isArray(v)?v.join('; '):String(v)); }),
         ]);
     });
-    const csv  = '\uFEFF' + csvRows.map(r=>r.map(v=>'"'+String(v).replace(/"/g,'""')+'"').join(',')).join('\r\n');
-    const blob = new Blob([csv],{type:'text/csv;charset=utf-8;'});
+    const xlsEsc = v => String(v).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;');
+    const toCell = v => `<Cell><Data ss:Type="String">${xlsEsc(v)}</Data></Cell>`;
+    const xml = `<?xml version="1.0" encoding="UTF-8"?>\n<?mso-application progid="Excel.Sheet"?>\n`
+        + `<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">`
+        + `<Worksheet ss:Name="Domicilios"><Table>\n`
+        + csvRows.map(r => `<Row>${r.map(toCell).join('')}</Row>`).join('\n')
+        + `\n</Table></Worksheet></Workbook>`;
+    const blob = new Blob([xml], {type:'application/vnd.ms-excel;charset=utf-8'});
     const url  = URL.createObjectURL(blob);
-    const a    = Object.assign(document.createElement('a'),{href:url,download:'formularios_domicilios_'+new Date().toISOString().slice(0,10)+'.csv'});
+    const a    = Object.assign(document.createElement('a'),{href:url,download:'formularios_domicilios_'+new Date().toISOString().slice(0,10)+'.xls'});
     document.body.appendChild(a); a.click(); document.body.removeChild(a); URL.revokeObjectURL(url);
     mostrarToast('✅ Excel descargado — ' + rows.length + ' registro(s)', 'success');
 }
diff --git a/lab_reportes.php b/lab_reportes.php
index df87106..b6eac6c 100644
--- a/lab_reportes.php
+++ b/lab_reportes.php
@@ -35,7 +35,7 @@ if ($tipo) {
                  ORDER BY o.created_at DESC",
                 [$desde, $hasta]
             );
-            $filename = "ordenes_$desde\_$hasta.csv";
+            $filename = "ordenes_$desde\_$hasta.xls";
             $headers  = ['ID','Paciente','Documento','EPS','Estado','Médico','Fecha Orden','Exámenes','Ayuno','H.Ayuno','Creada','Revisada por','Autorizada por'];
             break;
 
@@ -109,7 +109,7 @@ if ($tipo) {
                 $sqlParams
             );
             $rangoLabel = !empty($_GET['fecha']) ? $_GET['fecha'] : "{$desde}_{$hasta}";
-            $filename = "domicilios_{$rangoLabel}.csv";
+            $filename = "domicilios_{$rangoLabel}.xls";
             $headers  = [
                 'ID','Paciente','Documento','Teléfono','EPS',
                 'Fecha','Hora programada','Hora llegada','Hora salida','Duración',
@@ -133,7 +133,7 @@ if ($tipo) {
                  ORDER BY p.nombre_completo",
                 []
             );
-            $filename = "pacientes_" . date('Y-m-d') . ".csv";
+            $filename = "pacientes_" . date('Y-m-d') . ".xls";
             $headers  = ['ID','Nombre','Tipo Doc.','Documento','Teléfono','Email','EPS','Ciudad','Barrio','Activo','Total Órdenes','Registrado'];
             break;
 
@@ -191,7 +191,7 @@ if ($tipo) {
                  ORDER BY d.fecha_programada ASC, d.id ASC",
                 $pParams
             );
-            $filename = "reporte_pagos_{$rangoNombre}.csv";
+            $filename = "reporte_pagos_{$rangoNombre}.xls";
             $headers  = [
                 'ID','Fecha programada','Fecha pago','Paciente','Documento',
                 'Enfermero/a','Tipo cliente','Seguro','Estado domicilio',
@@ -204,17 +204,21 @@ if ($tipo) {
             exit('Tipo de exportación no válido');
     }
 
-    header('Content-Type: text/csv; charset=utf-8');
+    header('Content-Type: application/vnd.ms-excel; charset=utf-8');
     header("Content-Disposition: attachment; filename=\"$filename\"");
     header('Pragma: no-cache');
 
-    $f = fopen('php://output', 'w');
-    fputs($f, "\xEF\xBB\xBF"); // BOM UTF-8 para Excel
-    fputcsv($f, $headers);
+    $esc = fn($v) => htmlspecialchars((string)$v, ENT_XML1, 'UTF-8');
+    echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
+    echo '<?mso-application progid="Excel.Sheet"?>' . "\n";
+    echo '<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"' . "\n";
+    echo ' xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet">' . "\n";
+    echo '<Worksheet ss:Name="Reporte"><Table>' . "\n";
+    echo '<Row>' . implode('', array_map(fn($h) => '<Cell><Data ss:Type="String">' . $esc($h) . '</Data></Cell>', $headers)) . '</Row>' . "\n";
     foreach ($rows as $row) {
-        fputcsv($f, array_values($row));
+        echo '<Row>' . implode('', array_map(fn($v) => '<Cell><Data ss:Type="String">' . $esc($v) . '</Data></Cell>', array_values($row))) . '</Row>' . "\n";
     }
-    fclose($f);
+    echo '</Table></Worksheet></Workbook>';
     exit;
 }