diff --git a/homeassistant/components/ohme/diagnostics.py b/homeassistant/components/ohme/diagnostics.py
new file mode 100644
index 00000000000..a955b3b76e2
--- /dev/null
+++ b/homeassistant/components/ohme/diagnostics.py
@@ -0,0 +1,24 @@
+"""Provides diagnostics for Ohme."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.core import HomeAssistant
+
+from .coordinator import OhmeConfigEntry
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, config_entry: OhmeConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for Ohme."""
+    coordinators = config_entry.runtime_data
+    client = coordinators.charge_session_coordinator.client
+
+    return {
+        "device_info": client.device_info,
+        "vehicles": client.vehicles,
+        "ct_connected": client.ct_connected,
+        "cap_available": client.cap_available,
+    }
diff --git a/homeassistant/components/ohme/quality_scale.yaml b/homeassistant/components/ohme/quality_scale.yaml
index 497d5ad32e5..ba814202cdc 100644
--- a/homeassistant/components/ohme/quality_scale.yaml
+++ b/homeassistant/components/ohme/quality_scale.yaml
@@ -39,7 +39,7 @@ rules:
 
   # Gold
   devices: done
-  diagnostics: todo
+  diagnostics: done
   discovery:
     status: exempt
     comment: |
diff --git a/tests/components/ohme/snapshots/test_diagnostics.ambr b/tests/components/ohme/snapshots/test_diagnostics.ambr
new file mode 100644
index 00000000000..f51c701b71b
--- /dev/null
+++ b/tests/components/ohme/snapshots/test_diagnostics.ambr
@@ -0,0 +1,16 @@
+# serializer version: 1
+# name: test_diagnostics
+  dict({
+    'cap_available': True,
+    'ct_connected': True,
+    'device_info': dict({
+      'model': 'Home Pro',
+      'name': 'Ohme Home Pro',
+      'sw_version': 'v2.65',
+    }),
+    'vehicles': list([
+      'Nissan Leaf',
+      'Tesla Model 3',
+    ]),
+  })
+# ---
diff --git a/tests/components/ohme/test_diagnostics.py b/tests/components/ohme/test_diagnostics.py
new file mode 100644
index 00000000000..6aab1262189
--- /dev/null
+++ b/tests/components/ohme/test_diagnostics.py
@@ -0,0 +1,28 @@
+"""Tests for the diagnostics data provided by the Ohme integration."""
+
+from unittest.mock import MagicMock
+
+from syrupy import SnapshotAssertion
+
+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_diagnostics(
+    hass: HomeAssistant,
+    hass_client: ClientSessionGenerator,
+    mock_config_entry: MockConfigEntry,
+    mock_client: MagicMock,
+    snapshot: SnapshotAssertion,
+) -> None:
+    """Test diagnostics."""
+    await setup_integration(hass, mock_config_entry)
+    assert (
+        await get_diagnostics_for_config_entry(hass, hass_client, mock_config_entry)
+        == snapshot
+    )