diff --git a/homeassistant/components/iqvia/__init__.py b/homeassistant/components/iqvia/__init__.py
index 65914bb1756..f8ccf3c7e29 100644
--- a/homeassistant/components/iqvia/__init__.py
+++ b/homeassistant/components/iqvia/__init__.py
@@ -38,6 +38,7 @@ PLATFORMS = ["sensor"]
 
 async def async_setup_entry(hass, entry):
     """Set up IQVIA as config entry."""
+    hass.data.setdefault(DOMAIN, {})
     coordinators = {}
 
     if not entry.unique_id: