diff --git a/homeassistant/components/uptimerobot/coordinator.py b/homeassistant/components/uptimerobot/coordinator.py
index 2f6225fa498..7ecb1ee3313 100644
--- a/homeassistant/components/uptimerobot/coordinator.py
+++ b/homeassistant/components/uptimerobot/coordinator.py
@@ -39,7 +39,6 @@ class UptimeRobotDataUpdateCoordinator(DataUpdateCoordinator[list[UptimeRobotMon
             name=DOMAIN,
             update_interval=COORDINATOR_UPDATE_INTERVAL,
         )
-        self._device_registry = dr.async_get(hass)
         self.api = api
 
     async def _async_update_data(self) -> list[UptimeRobotMonitor]:
@@ -56,23 +55,21 @@ class UptimeRobotDataUpdateCoordinator(DataUpdateCoordinator[list[UptimeRobotMon
 
         monitors: list[UptimeRobotMonitor] = response.data
 
-        current_monitors = {
-            list(device.identifiers)[0][1]
-            for device in dr.async_entries_for_config_entry(
-                self._device_registry, self.config_entry.entry_id
-            )
-        }
+        current_monitors = (
+            {str(monitor.id) for monitor in self.data} if self.data else set()
+        )
         new_monitors = {str(monitor.id) for monitor in monitors}
         if stale_monitors := current_monitors - new_monitors:
             for monitor_id in stale_monitors:
-                if device := self._device_registry.async_get_device(
+                device_registry = dr.async_get(self.hass)
+                if device := device_registry.async_get_device(
                     identifiers={(DOMAIN, monitor_id)}
                 ):
-                    self._device_registry.async_remove_device(device.id)
+                    device_registry.async_remove_device(device.id)
 
         # If there are new monitors, we should reload the config entry so we can
         # create new devices and entities.
-        if self.data and new_monitors - {str(monitor.id) for monitor in self.data}:
+        if self.data and new_monitors - current_monitors:
             self.hass.async_create_task(
                 self.hass.config_entries.async_reload(self.config_entry.entry_id)
             )