diff --git a/homeassistant/components/immich/diagnostics.py b/homeassistant/components/immich/diagnostics.py
new file mode 100644
index 00000000000..c44e24d8202
--- /dev/null
+++ b/homeassistant/components/immich/diagnostics.py
@@ -0,0 +1,26 @@
+"""Diagnostics support for immich."""
+
+from __future__ import annotations
+
+from dataclasses import asdict
+from typing import Any
+
+from homeassistant.components.diagnostics import async_redact_data
+from homeassistant.const import CONF_API_KEY, CONF_HOST
+from homeassistant.core import HomeAssistant
+
+from .coordinator import ImmichConfigEntry
+
+TO_REDACT = {CONF_API_KEY, CONF_HOST}
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, entry: ImmichConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    coordinator = entry.runtime_data
+
+    return {
+        "entry": async_redact_data(entry.as_dict(), TO_REDACT),
+        "data": asdict(coordinator.data),
+    }
diff --git a/homeassistant/components/immich/quality_scale.yaml b/homeassistant/components/immich/quality_scale.yaml
index e89127871e2..053d51eb8c7 100644
--- a/homeassistant/components/immich/quality_scale.yaml
+++ b/homeassistant/components/immich/quality_scale.yaml
@@ -39,7 +39,7 @@ rules:
 
   # Gold
   devices: done
-  diagnostics: todo
+  diagnostics: done
   discovery-update-info:
     status: exempt
     comment: Service can't be discovered
diff --git a/tests/components/immich/snapshots/test_diagnostics.ambr b/tests/components/immich/snapshots/test_diagnostics.ambr
new file mode 100644
index 00000000000..3216de2fabd
--- /dev/null
+++ b/tests/components/immich/snapshots/test_diagnostics.ambr
@@ -0,0 +1,66 @@
+# serializer version: 1
+# name: test_entry_diagnostics
+  dict({
+    'data': dict({
+      'server_about': dict({
+        'build': None,
+        'build_image': None,
+        'build_image_url': None,
+        'build_url': None,
+        'exiftool': None,
+        'ffmpeg': None,
+        'imagemagick': None,
+        'libvips': None,
+        'licensed': False,
+        'nodejs': None,
+        'repository': None,
+        'repository_url': None,
+        'source_commit': None,
+        'source_ref': None,
+        'source_url': None,
+        'version': 'v1.132.3',
+        'version_url': 'some_url',
+      }),
+      'server_storage': dict({
+        'disk_available': '136.3 GiB',
+        'disk_available_raw': 146402975744,
+        'disk_size': '294.2 GiB',
+        'disk_size_raw': 315926315008,
+        'disk_usage_percentage': 48.56,
+        'disk_use': '142.9 GiB',
+        'disk_use_raw': 153400434688,
+      }),
+      'server_usage': dict({
+        'photos': 27038,
+        'usage': 119525451912,
+        'usage_photos': 54291170551,
+        'usage_videos': 65234281361,
+        'videos': 1836,
+      }),
+    }),
+    'entry': dict({
+      'data': dict({
+        'api_key': '**REDACTED**',
+        'host': '**REDACTED**',
+        'port': 80,
+        'ssl': False,
+        'verify_ssl': True,
+      }),
+      'disabled_by': None,
+      'discovery_keys': dict({
+      }),
+      'domain': 'immich',
+      'minor_version': 1,
+      'options': dict({
+      }),
+      'pref_disable_new_entities': False,
+      'pref_disable_polling': False,
+      'source': 'user',
+      'subentries': list([
+      ]),
+      'title': 'Someone',
+      'unique_id': 'e7ef5713-9dab-4bd4-b899-715b0ca4379e',
+      'version': 1,
+    }),
+  })
+# ---
diff --git a/tests/components/immich/test_diagnostics.py b/tests/components/immich/test_diagnostics.py
new file mode 100644
index 00000000000..f816aab8aae
--- /dev/null
+++ b/tests/components/immich/test_diagnostics.py
@@ -0,0 +1,33 @@
+"""Tests for the Immich integration."""
+
+from __future__ import annotations
+
+from unittest.mock import Mock
+
+from syrupy import SnapshotAssertion
+from syrupy.filters import props
+
+from homeassistant.core import HomeAssistant
+
+from . import setup_integration
+
+from tests.common import MockConfigEntry
+from tests.components.diagnostics import get_diagnostics_for_config_entry
+from tests.typing import ClientSessionGenerator
+
+
+async def test_entry_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    snapshot: SnapshotAssertion,
+    mock_immich: Mock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test config entry diagnostics."""
+    await setup_integration(hass, mock_config_entry)
+
+    result = await get_diagnostics_for_config_entry(
+        hass, hass_client, mock_config_entry
+    )
+
+    assert result == snapshot(exclude=props("created_at", "modified_at", "entry_id"))