diff --git a/api/lab/check_whatsapp.php b/api/lab/check_whatsapp.php
new file mode 100644
index 0000000..9029105
--- /dev/null
+++ b/api/lab/check_whatsapp.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ * GET /api/lab/check_whatsapp.php?phone=573001234567
+ * Verifica si un número de teléfono está registrado en WhatsApp (tabla users).
+ */
+require_once __DIR__ . '/_helpers.php';
+requireAuth();
+
+$phone = trim($_GET['phone'] ?? '');
+if (!$phone) { jsonError('phone requerido', 400); }
+
+$pdo  = db();
+$stmt = $pdo->prepare("SELECT id, name, phone_number FROM users WHERE phone_number = ? LIMIT 1");
+$stmt->execute([$phone]);
+$user = $stmt->fetch(PDO::FETCH_ASSOC);
+
+jsonOk([
+    'found'        => (bool)$user,
+    'user_id'      => $user ? (int)$user['id'] : null,
+    'phone_number' => $user ? $user['phone_number'] : null,
+]);
diff --git a/api/lab/save_paciente.php b/api/lab/save_paciente.php
index 731c83a..b35aa9d 100644
--- a/api/lab/save_paciente.php
+++ b/api/lab/save_paciente.php
@@ -51,6 +51,15 @@ try {
     }
     // ────────────────────────────────────────────────────────────────────────
 
+    // Auto-vincular user_id por teléfono si no viene explícito
+    if (empty($datos['user_id']) && !empty($telVal)) {
+        $pdo  = db();
+        $stmt = $pdo->prepare("SELECT id FROM users WHERE phone_number = ? LIMIT 1");
+        $stmt->execute([$telVal]);
+        $wid = $stmt->fetchColumn();
+        if ($wid) $datos['user_id'] = (int)$wid;
+    }
+
     $pac   = new Paciente();
     $admin = adminId();
 
diff --git a/lab_pacientes.php b/lab_pacientes.php
index 696c161..3c95956 100644
--- a/lab_pacientes.php
+++ b/lab_pacientes.php
@@ -283,8 +283,11 @@ require_once __DIR__ . '/shared/components/sidebar.php';
                                         <option value="1">🇺🇸 1</option>
                                     </select>
                                     <input type="tel" class="form-control" name="telefono" id="pac-tel"
-                                           placeholder="3001234567" tabindex="5" style="border-radius:0 .45rem .45rem 0">
+                                           placeholder="3001234567" tabindex="5" style="border-radius:0 .45rem .45rem 0"
+                                           onblur="verificarWhatsapp()">
                                 </div>
+                                <div id="wa-badge" class="mt-1" style="font-size:.78rem;min-height:18px"></div>
+                                <input type="hidden" id="pac-user-id" name="user_id">
                             </div>
                             <div class="col-sm-4">
                                 <div class="form-floating">
@@ -517,6 +520,27 @@ async function editarPaciente(id) {
     if (d.data?.[0]) abrirFormulario(d.data[0]);
 }
 
+async function verificarWhatsapp() {
+    const prefijo = document.getElementById('pac-tel-prefijo').value || '57';
+    let tel = (document.getElementById('pac-tel').value || '').replace(/[^0-9]/g, '');
+    if (tel.length === 10) tel = prefijo + tel;
+    const badge = document.getElementById('wa-badge');
+    const hiddenUid = document.getElementById('pac-user-id');
+    if (!tel || tel.length < 10) { badge.innerHTML = ''; hiddenUid.value = ''; return; }
+    badge.innerHTML = '<span class="text-muted"><i class="fas fa-spinner fa-spin me-1"></i>Verificando WhatsApp…</span>';
+    try {
+        const r = await fetch(`api/lab/check_whatsapp.php?phone=${encodeURIComponent(tel)}`);
+        const d = await r.json();
+        if (d.ok && d.data.found) {
+            badge.innerHTML = '<span class="text-success"><i class="fab fa-whatsapp me-1"></i>Registrado en WhatsApp</span>';
+            hiddenUid.value = d.data.user_id;
+        } else {
+            badge.innerHTML = '<span class="text-muted"><i class="fas fa-times-circle me-1"></i>Sin WhatsApp registrado</span>';
+            hiddenUid.value = '';
+        }
+    } catch(_) { badge.innerHTML = ''; hiddenUid.value = ''; }
+}
+
 async function guardarPaciente() {
     const form = document.getElementById('form-paciente');
     if (!form.checkValidity()) { form.reportValidity(); return; }
diff --git a/modules/turnero/views/recepcion.php b/modules/turnero/views/recepcion.php
index c404ff9..29d4ecc 100644
--- a/modules/turnero/views/recepcion.php
+++ b/modules/turnero/views/recepcion.php
@@ -908,7 +908,7 @@ async function buscarPaciente() {
         }
         lista.innerHTML = datos.map(p => `
             <div class="pac-resultado" onclick="seleccionarPaciente(${JSON.stringify(p).replace(/"/g,'&quot;')})">
-                <div class="pac-nombre">${escHtml((p.full_name||p.nombre||'') + ' ' + (p.apellido||''))}</div>
+                <div class="pac-nombre">${escHtml(p.nombre_completo||p.full_name||p.nombre||'')}</div>
                 <div class="pac-doc">${escHtml(p.tipo_documento||'')} ${escHtml(p.documento||p.numero_documento||'')}
                     ${p.telefono||p.celular ? '· ' + escHtml(p.telefono||p.celular) : ''}</div>
             </div>`).join('');