diff --git a/homeassistant/components/mobile_app/const.py b/homeassistant/components/mobile_app/const.py
index e375ec55ff2..48fed416c33 100644
--- a/homeassistant/components/mobile_app/const.py
+++ b/homeassistant/components/mobile_app/const.py
@@ -49,6 +49,7 @@ ATTR_VERTICAL_ACCURACY = "vertical_accuracy"
 ATTR_WEBHOOK_DATA = "data"
 ATTR_WEBHOOK_ENCRYPTED = "encrypted"
 ATTR_WEBHOOK_ENCRYPTED_DATA = "encrypted_data"
+ATTR_WEBHOOK_ID = "webhook_id"
 ATTR_WEBHOOK_TYPE = "type"
 
 ERR_ENCRYPTION_ALREADY_ENABLED = "encryption_already_enabled"
diff --git a/homeassistant/components/mobile_app/notify.py b/homeassistant/components/mobile_app/notify.py
index 025880d8107..36afbac71c8 100644
--- a/homeassistant/components/mobile_app/notify.py
+++ b/homeassistant/components/mobile_app/notify.py
@@ -36,6 +36,7 @@ from .const import (
     ATTR_PUSH_RATE_LIMITS_SUCCESSFUL,
     ATTR_PUSH_TOKEN,
     ATTR_PUSH_URL,
+    ATTR_WEBHOOK_ID,
     DATA_CONFIG_ENTRIES,
     DATA_NOTIFY,
     DATA_PUSH_CHANNEL,
@@ -147,6 +148,7 @@ class MobileAppNotificationService(BaseNotificationService):
         reg_info = {
             ATTR_APP_ID: entry_data[ATTR_APP_ID],
             ATTR_APP_VERSION: entry_data[ATTR_APP_VERSION],
+            ATTR_WEBHOOK_ID: target,
         }
         if ATTR_OS_VERSION in entry_data:
             reg_info[ATTR_OS_VERSION] = entry_data[ATTR_OS_VERSION]
diff --git a/tests/components/mobile_app/test_notify.py b/tests/components/mobile_app/test_notify.py
index c0e1b4c2a85..86cc9f0ae67 100644
--- a/tests/components/mobile_app/test_notify.py
+++ b/tests/components/mobile_app/test_notify.py
@@ -118,6 +118,7 @@ async def test_notify_works(hass, aioclient_mock, setup_push_receiver):
     assert call_json["message"] == "Hello world"
     assert call_json["registration_info"]["app_id"] == "io.homeassistant.mobile_app"
     assert call_json["registration_info"]["app_version"] == "1.0"
+    assert call_json["registration_info"]["webhook_id"] == "mock-webhook_id"
 
 
 async def test_notify_ws_works(