diff --git a/homeassistant/components/dexcom/__init__.py b/homeassistant/components/dexcom/__init__.py
index e93e8e66358..f799d150f61 100644
--- a/homeassistant/components/dexcom/__init__.py
+++ b/homeassistant/components/dexcom/__init__.py
@@ -1,21 +1,14 @@
 """The Dexcom integration."""
 
-from datetime import timedelta
-import logging
-
-from pydexcom import AccountError, Dexcom, GlucoseReading, SessionError
+from pydexcom import AccountError, Dexcom, SessionError
 
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
-from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
 from .const import CONF_SERVER, DOMAIN, PLATFORMS, SERVER_OUS
-
-_LOGGER = logging.getLogger(__name__)
-
-SCAN_INTERVAL = timedelta(seconds=180)
+from .coordinator import DexcomCoordinator
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
@@ -32,20 +25,7 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     except SessionError as error:
         raise ConfigEntryNotReady from error
 
-    async def async_update_data():
-        try:
-            return await hass.async_add_executor_job(dexcom.get_current_glucose_reading)
-        except SessionError as error:
-            raise UpdateFailed(error) from error
-
-    coordinator = DataUpdateCoordinator[GlucoseReading](
-        hass,
-        _LOGGER,
-        config_entry=entry,
-        name=DOMAIN,
-        update_method=async_update_data,
-        update_interval=SCAN_INTERVAL,
-    )
+    coordinator = DexcomCoordinator(hass, entry=entry, dexcom=dexcom)
     await coordinator.async_config_entry_first_refresh()
 
     hass.data.setdefault(DOMAIN, {})[entry.entry_id] = coordinator
diff --git a/homeassistant/components/dexcom/coordinator.py b/homeassistant/components/dexcom/coordinator.py
new file mode 100644
index 00000000000..af01482c4eb
--- /dev/null
+++ b/homeassistant/components/dexcom/coordinator.py
@@ -0,0 +1,42 @@
+"""Coordinator for the Dexcom integration."""
+
+from datetime import timedelta
+import logging
+
+from pydexcom import Dexcom, GlucoseReading
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
+
+from .const import DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+_SCAN_INTERVAL = timedelta(seconds=180)
+
+
+class DexcomCoordinator(DataUpdateCoordinator[GlucoseReading]):
+    """Dexcom Coordinator."""
+
+    def __init__(
+        self,
+        hass: HomeAssistant,
+        entry: ConfigEntry,
+        dexcom: Dexcom,
+    ) -> None:
+        """Initialize the coordinator."""
+        super().__init__(
+            hass,
+            _LOGGER,
+            config_entry=entry,
+            name=DOMAIN,
+            update_interval=_SCAN_INTERVAL,
+        )
+        self.dexcom = dexcom
+
+    async def _async_update_data(self) -> GlucoseReading:
+        """Fetch data from API endpoint."""
+        return await self.hass.async_add_executor_job(
+            self.dexcom.get_current_glucose_reading
+        )
diff --git a/homeassistant/components/dexcom/sensor.py b/homeassistant/components/dexcom/sensor.py
index 850678e7ac9..d9381964db7 100644
--- a/homeassistant/components/dexcom/sensor.py
+++ b/homeassistant/components/dexcom/sensor.py
@@ -2,20 +2,16 @@
 
 from __future__ import annotations
 
-from pydexcom import GlucoseReading
-
 from homeassistant.components.sensor import SensorDeviceClass, SensorEntity
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_USERNAME, UnitOfBloodGlucoseConcentration
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.update_coordinator import (
-    CoordinatorEntity,
-    DataUpdateCoordinator,
-)
+from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import DOMAIN
+from .coordinator import DexcomCoordinator
 
 TRENDS = {
     1: "rising_quickly",
@@ -44,16 +40,14 @@ async def async_setup_entry(
     )
 
 
-class DexcomSensorEntity(
-    CoordinatorEntity[DataUpdateCoordinator[GlucoseReading]], SensorEntity
-):
+class DexcomSensorEntity(CoordinatorEntity[DexcomCoordinator], SensorEntity):
     """Base Dexcom sensor entity."""
 
     _attr_has_entity_name = True
 
     def __init__(
         self,
-        coordinator: DataUpdateCoordinator[GlucoseReading],
+        coordinator: DexcomCoordinator,
         username: str,
         entry_id: str,
         key: str,
@@ -78,7 +72,7 @@ class DexcomGlucoseValueSensor(DexcomSensorEntity):
 
     def __init__(
         self,
-        coordinator: DataUpdateCoordinator,
+        coordinator: DexcomCoordinator,
         username: str,
         entry_id: str,
     ) -> None:
@@ -101,7 +95,7 @@ class DexcomGlucoseTrendSensor(DexcomSensorEntity):
     _attr_options = list(TRENDS.values())
 
     def __init__(
-        self, coordinator: DataUpdateCoordinator, username: str, entry_id: str
+        self, coordinator: DexcomCoordinator, username: str, entry_id: str
     ) -> None:
         """Initialize the sensor."""
         super().__init__(coordinator, username, entry_id, "trend")