diff --git a/homeassistant/components/iqvia/__init__.py b/homeassistant/components/iqvia/__init__.py
index 5d13a2373a6..30a54fa1fd0 100644
--- a/homeassistant/components/iqvia/__init__.py
+++ b/homeassistant/components/iqvia/__init__.py
@@ -104,43 +104,15 @@ class IQVIAEntity(CoordinatorEntity, SensorEntity):
     def __init__(self, coordinator, entry, sensor_type, name, icon):
         """Initialize."""
         super().__init__(coordinator)
-        self._attrs = {ATTR_ATTRIBUTION: DEFAULT_ATTRIBUTION}
+
+        self._attr_extra_state_attributes = {ATTR_ATTRIBUTION: DEFAULT_ATTRIBUTION}
+        self._attr_icon = icon
+        self._attr_name = name
+        self._attr_unique_id = f"{entry.data[CONF_ZIP_CODE]}_{sensor_type}"
+        self._attr_unit_of_measurement = "index"
         self._entry = entry
-        self._icon = icon
-        self._name = name
-        self._state = None
         self._type = sensor_type
 
-    @property
-    def extra_state_attributes(self):
-        """Return the device state attributes."""
-        return self._attrs
-
-    @property
-    def icon(self):
-        """Return the icon."""
-        return self._icon
-
-    @property
-    def name(self):
-        """Return the name."""
-        return self._name
-
-    @property
-    def state(self):
-        """Return the state."""
-        return self._state
-
-    @property
-    def unique_id(self):
-        """Return a unique, Home Assistant friendly identifier for this entity."""
-        return f"{self._entry.data[CONF_ZIP_CODE]}_{self._type}"
-
-    @property
-    def unit_of_measurement(self):
-        """Return the unit the value is expressed in."""
-        return "index"
-
     @callback
     def _handle_coordinator_update(self) -> None:
         """Handle updated data from the coordinator."""
diff --git a/homeassistant/components/iqvia/sensor.py b/homeassistant/components/iqvia/sensor.py
index b0420a52ee9..0ff236a8f79 100644
--- a/homeassistant/components/iqvia/sensor.py
+++ b/homeassistant/components/iqvia/sensor.py
@@ -120,7 +120,7 @@ class ForecastSensor(IQVIAEntity):
             if i["minimum"] <= average <= i["maximum"]
         ]
 
-        self._attrs.update(
+        self._attr_extra_state_attributes.update(
             {
                 ATTR_CITY: data["City"].title(),
                 ATTR_RATING: rating,
@@ -134,10 +134,14 @@ class ForecastSensor(IQVIAEntity):
             outlook_coordinator = self.hass.data[DOMAIN][DATA_COORDINATOR][
                 self._entry.entry_id
             ][TYPE_ALLERGY_OUTLOOK]
-            self._attrs[ATTR_OUTLOOK] = outlook_coordinator.data.get("Outlook")
-            self._attrs[ATTR_SEASON] = outlook_coordinator.data.get("Season")
+            self._attr_extra_state_attributes[
+                ATTR_OUTLOOK
+            ] = outlook_coordinator.data.get("Outlook")
+            self._attr_extra_state_attributes[
+                ATTR_SEASON
+            ] = outlook_coordinator.data.get("Season")
 
-        self._state = average
+        self._attr_state = average
 
 
 class IndexSensor(IQVIAEntity):
@@ -172,7 +176,7 @@ class IndexSensor(IQVIAEntity):
             if i["minimum"] <= period["Index"] <= i["maximum"]
         ]
 
-        self._attrs.update(
+        self._attr_extra_state_attributes.update(
             {
                 ATTR_CITY: data["City"].title(),
                 ATTR_RATING: rating,
@@ -184,7 +188,7 @@ class IndexSensor(IQVIAEntity):
         if self._type in (TYPE_ALLERGY_TODAY, TYPE_ALLERGY_TOMORROW):
             for idx, attrs in enumerate(period["Triggers"]):
                 index = idx + 1
-                self._attrs.update(
+                self._attr_extra_state_attributes.update(
                     {
                         f"{ATTR_ALLERGEN_GENUS}_{index}": attrs["Genus"],
                         f"{ATTR_ALLERGEN_NAME}_{index}": attrs["Name"],
@@ -194,7 +198,7 @@ class IndexSensor(IQVIAEntity):
         elif self._type in (TYPE_ASTHMA_TODAY, TYPE_ASTHMA_TOMORROW):
             for idx, attrs in enumerate(period["Triggers"]):
                 index = idx + 1
-                self._attrs.update(
+                self._attr_extra_state_attributes.update(
                     {
                         f"{ATTR_ALLERGEN_NAME}_{index}": attrs["Name"],
                         f"{ATTR_ALLERGEN_AMOUNT}_{index}": attrs["PPM"],
@@ -202,6 +206,8 @@ class IndexSensor(IQVIAEntity):
                 )
         elif self._type == TYPE_DISEASE_TODAY:
             for attrs in period["Triggers"]:
-                self._attrs[f"{attrs['Name'].lower()}_index"] = attrs["Index"]
+                self._attr_extra_state_attributes[
+                    f"{attrs['Name'].lower()}_index"
+                ] = attrs["Index"]
 
-        self._state = period["Index"]
+        self._attr_state = period["Index"]