diff --git a/frontend/src/pages/Agenda.tsx b/frontend/src/pages/Agenda.tsx
index f08da21..6eeea9b 100644
--- a/frontend/src/pages/Agenda.tsx
+++ b/frontend/src/pages/Agenda.tsx
@@ -183,6 +183,25 @@ const Agenda: FC = () => {
     return 'Sin confirmar por teléfono';
   };
 
+  // ---- Sala de espera: citas con check-in (2da confirmación) por atender ----
+  // Para rol medico el servidor ya devuelve solo sus citas; para recepción/admin
+  // se respeta el filtro de médico seleccionado (filteredAppointments).
+  const waitSortKey = (a: Appointment) => a.arrived_at || `9999-12-31 ${a.time}`;
+  const waitingAppointments = filteredAppointments
+    .filter((a) => a.state === 'arrived')
+    .sort((a, b) => waitSortKey(a).localeCompare(waitSortKey(b)));
+
+  // arrived_at viene en UTC (datetime de Odoo)
+  const waitLabel = (apt: Appointment): string | null => {
+    if (!apt.arrived_at) return null;
+    const arrived = new Date(`${apt.arrived_at.replace(' ', 'T')}Z`);
+    if (Number.isNaN(arrived.getTime())) return null;
+    const mins = Math.max(0, Math.round((Date.now() - arrived.getTime()) / 60000));
+    if (mins < 1) return 'Recién llegó';
+    if (mins < 60) return `${mins} min en espera`;
+    return `${Math.floor(mins / 60)} h ${String(mins % 60).padStart(2, '0')} min en espera`;
+  };
+
   // ---- Vista por médico (grid doctores x bloques de 15 min) ----
   const GRID_START = 8;  // horario clínica: 8:00
   const GRID_END = 19;   // horario clínica: 19:00 (último bloque inicia 18:45)
@@ -944,6 +963,37 @@ const Agenda: FC = () => {
             )}
           </div>
 
+          {/* Sala de espera: pacientes con check-in (2da confirmación) por atender */}
+          <div className="mb-4 sm:mb-5 rounded-2xl border-2 border-sky-700 bg-brand-sky/40 p-3">
+            <div className="flex items-center gap-2 mb-2">
+              <UserCheck size={16} className="text-sky-700" />
+              <p className="text-xs font-semibold text-theme-heading uppercase">Por atender</p>
+              <span className="inline-flex items-center justify-center min-w-[18px] h-[18px] px-1 rounded-full text-[10px] bg-theme-surface text-theme-heading border border-theme-border">
+                {waitingAppointments.length}
+              </span>
+            </div>
+            {waitingAppointments.length === 0 ? (
+              <p className="text-xs text-theme-muted">Sin pacientes en espera.</p>
+            ) : (
+              <div className="flex flex-wrap gap-2">
+                {waitingAppointments.map((apt) => (
+                  <button
+                    key={apt.id}
+                    type="button"
+                    onClick={() => openAptDetail(apt)}
+                    className="rounded-xl border border-sky-700 bg-theme-surface px-3 py-2 text-left shadow-card transition-shadow hover:shadow-soft"
+                  >
+                    <p className="text-sm font-semibold text-theme-heading">{apt.time} · {apt.patient}</p>
+                    <p className="text-xs text-theme-muted truncate max-w-[240px]">
+                      {apt.service}{!isMedico && apt.doctor ? ` · ${apt.doctor}` : ''}
+                    </p>
+                    <p className="text-xs font-medium text-sky-700">{waitLabel(apt) || 'En espera'}</p>
+                  </button>
+                ))}
+              </div>
+            )}
+          </div>
+
           {error && <p className="text-rose-600 text-sm mb-4">{error}</p>}
 
           {loading ? (
diff --git a/frontend/src/services/odoo.ts b/frontend/src/services/odoo.ts
index 27148af..d562dac 100644
--- a/frontend/src/services/odoo.ts
+++ b/frontend/src/services/odoo.ts
@@ -72,6 +72,8 @@ export interface Appointment {
   phone_confirmed?: boolean;
   phone_confirmed_at?: string | null;
   phone_confirmed_by?: string | null;
+  // Timestamp del check-in de llegada (2da confirmación)
+  arrived_at?: string | null;
 }
 
 export interface Bloqueo {
diff --git a/odoo-addons/skeen_citas/models/cita.py b/odoo-addons/skeen_citas/models/cita.py
index 20d68cd..b00f15f 100644
--- a/odoo-addons/skeen_citas/models/cita.py
+++ b/odoo-addons/skeen_citas/models/cita.py
@@ -133,6 +133,8 @@ class SkeenCita(models.Model):
     phone_confirmed_at = fields.Datetime(string='Fecha Confirmación Tel.', readonly=True, copy=False)
     phone_confirmed_by = fields.Char(string='Confirmada por', readonly=True, copy=False,
                                      help='Login del usuario del frontend que confirmó por teléfono')
+    # Timestamp del check-in de llegada (2da confirmación); base del tiempo de espera
+    arrived_at = fields.Datetime(string='Hora de Llegada', readonly=True, copy=False)
     
     # Pago
     payment_state = fields.Selection([
@@ -182,7 +184,7 @@ class SkeenCita(models.Model):
         self.write({'state': 'confirmed'})
     
     def action_arrive(self):
-        self.write({'state': 'arrived'})
+        self.write({'state': 'arrived', 'arrived_at': fields.Datetime.now()})
     
     def action_start(self):
         self.write({'state': 'in_progress'})
diff --git a/odoo-addons/skeen_whatsapp/controllers/frontend.py b/odoo-addons/skeen_whatsapp/controllers/frontend.py
index faa5b94..e8a61ab 100644
--- a/odoo-addons/skeen_whatsapp/controllers/frontend.py
+++ b/odoo-addons/skeen_whatsapp/controllers/frontend.py
@@ -776,6 +776,8 @@ class SkeenFrontendController(http.Controller):
             'phone_confirmed': cita.phone_confirmed,
             'phone_confirmed_at': cita.phone_confirmed_at.strftime('%Y-%m-%d %H:%M') if cita.phone_confirmed_at else None,
             'phone_confirmed_by': cita.phone_confirmed_by or None,
+            # 2da confirmación: timestamp del check-in (base del tiempo de espera)
+            'arrived_at': cita.arrived_at.strftime('%Y-%m-%d %H:%M:%S') if cita.arrived_at else None,
         }
 
     # ============================================================