diff --git a/migrar_origen.php b/migrar_origen.php
new file mode 100644
index 0000000..d3f6d57
--- /dev/null
+++ b/migrar_origen.php
@@ -0,0 +1,25 @@
+<?php
+require_once __DIR__ . '/config/config.php';
+if (!defined('MIGRATION_TOKEN') || ($_GET['token'] ?? '') !== MIGRATION_TOKEN) {
+    http_response_code(403); die('Acceso denegado');
+}
+
+$pdo = Database::getInstance()->getConnection();
+
+$steps = [
+    "ALTER TABLE lab_pacientes ADD COLUMN IF NOT EXISTS origen VARCHAR(20) NOT NULL DEFAULT 'manual' COMMENT 'Origen: manual | rips | whatsapp' AFTER notas_admin",
+    "UPDATE lab_pacientes SET origen = 'whatsapp' WHERE user_id IS NOT NULL AND origen = 'manual'",
+    "CREATE INDEX IF NOT EXISTS idx_pac_origen ON lab_pacientes (origen)",
+];
+
+echo '<pre>';
+foreach ($steps as $sql) {
+    echo htmlspecialchars(substr($sql, 0, 80)) . "...\n";
+    try {
+        $pdo->exec($sql);
+        echo "  ✓ OK\n\n";
+    } catch (\Throwable $e) {
+        echo "  ✗ ERROR: " . htmlspecialchars($e->getMessage()) . "\n\n";
+    }
+}
+echo "Listo.\n</pre>";