diff --git a/src/components/PRAnalyticsDashboard/ReviewsInsight/PRQualityGraph.jsx b/src/components/PRAnalyticsDashboard/ReviewsInsight/PRQualityGraph.jsx
index a2b9810496..f58355e04e 100644
--- a/src/components/PRAnalyticsDashboard/ReviewsInsight/PRQualityGraph.jsx
+++ b/src/components/PRAnalyticsDashboard/ReviewsInsight/PRQualityGraph.jsx
@@ -7,7 +7,13 @@ import ChartDataLabels from 'chartjs-plugin-datalabels';
 
 Chart.register(ChartDataLabels);
 
-function PRQualityGraph({ selectedTeams, qualityData, isDataViewActive, orderedTeamIds }) {
+function PRQualityGraph({
+  selectedTeams,
+  qualityData,
+  isDataViewActive,
+  orderedTeamIds,
+  teamData,
+}) {
   const darkMode = useSelector(state => state.theme.darkMode);
 
   if (!selectedTeams || selectedTeams.length === 0) {
@@ -67,9 +73,8 @@ function PRQualityGraph({ selectedTeams, qualityData, isDataViewActive, orderedT
         displayColors: false,
         enabled: true,
         callbacks: {
-          title: items =>
-            items && items[0] ? `${items[0].label}: ${items[0].formattedValue}` : '',
-          label: ctx => (isDataViewActive ? `${ctx.raw.toFixed(1)}%` : ctx.raw),
+          title: () => '',
+          label: ctx => `${ctx.label}: ${isDataViewActive ? `${ctx.raw.toFixed(1)}%` : ctx.raw}`,
         },
       },
       datalabels: {
@@ -101,6 +106,14 @@ function PRQualityGraph({ selectedTeams, qualityData, isDataViewActive, orderedT
               }`}
             >
               {team}
+              <span
+                className={`${sharedStyles.riTeamMemberCount} ${
+                  darkMode ? sharedStyles.darkModeForeground : ''
+                }`}
+              >
+                {' '}
+                ({teamData[team]?.memberCount || 0} members)
+              </span>
             </h3>
             <Pie data={generateChartData(team)} options={options} />
           </div>
@@ -127,6 +140,11 @@ PRQualityGraph.propTypes = {
   ),
   isDataViewActive: PropTypes.bool,
   orderedTeamIds: PropTypes.arrayOf(PropTypes.string),
+  teamData: PropTypes.objectOf(
+    PropTypes.shape({
+      memberCount: PropTypes.number,
+    }),
+  ),
 };
 
 PRQualityGraph.defaultProps = {
@@ -134,6 +152,7 @@ PRQualityGraph.defaultProps = {
   qualityData: {},
   isDataViewActive: false,
   orderedTeamIds: [],
+  teamData: {},
 };
 
 export default PRQualityGraph;
diff --git a/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.jsx b/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.jsx
index 3086749795..107dc1de9a 100644
--- a/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.jsx
+++ b/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.jsx
@@ -247,6 +247,7 @@ function ReviewsInsight() {
             qualityData={qualityData}
             isDataViewActive={dataViewActive}
             orderedTeamIds={orderedTeamIds}
+            teamData={teamData}
           />
         </div>
       )}
diff --git a/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.module.css b/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.module.css
index fafa0b329c..f8ca15659f 100644
--- a/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.module.css
+++ b/src/components/PRAnalyticsDashboard/ReviewsInsight/ReviewsInsight.module.css
@@ -237,6 +237,11 @@
   border: none;
 }
 
+.riTeamMemberCount {
+  font-size: 0.8em;
+  font-weight: normal;
+}
+
 /* Shared */
 .riGraph {
   border: 1px solid #ccc;
diff --git a/src/components/PRAnalyticsDashboard/ReviewsInsight/__tests__/PRQualityGraph.test.jsx b/src/components/PRAnalyticsDashboard/ReviewsInsight/__tests__/PRQualityGraph.test.jsx
new file mode 100644
index 0000000000..e4edde762b
--- /dev/null
+++ b/src/components/PRAnalyticsDashboard/ReviewsInsight/__tests__/PRQualityGraph.test.jsx
@@ -0,0 +1,102 @@
+import { vi } from 'vitest';
+
+vi.mock('react-redux', async importOriginal => {
+  const actual = await importOriginal();
+  return {
+    ...actual,
+    useSelector: vi.fn(() => false),
+  };
+});
+
+let lastPieOptions;
+vi.mock('react-chartjs-2', () => ({
+  Pie: ({ options }) => {
+    lastPieOptions = options;
+    return <div data-testid="pie-chart" />;
+  },
+}));
+
+import { render, screen } from '@testing-library/react';
+import PRQualityGraph from '../PRQualityGraph';
+
+const renderWithStore = ui => render(ui);
+
+const selectedTeams = [{ value: 'Team A', label: 'Team A' }];
+const qualityData = {
+  'Team A': {
+    NotApproved: 0,
+    LowQuality: 1,
+    Sufficient: 1,
+    Exceptional: 0,
+  },
+};
+const teamData = {
+  'Team A': {
+    memberCount: 5,
+  },
+};
+
+describe('PRQualityGraph', () => {
+  it('labels every category in the tooltip in Number mode', () => {
+    renderWithStore(
+      <PRQualityGraph
+        selectedTeams={selectedTeams}
+        qualityData={qualityData}
+        isDataViewActive={false}
+        orderedTeamIds={['Team A']}
+        teamData={teamData}
+      />,
+    );
+
+    const { tooltip } = lastPieOptions.plugins;
+    expect(tooltip.callbacks.title()).toBe('');
+    expect(tooltip.callbacks.label({ label: 'Not Approved', raw: 0 })).toBe('Not Approved: 0');
+    expect(tooltip.callbacks.label({ label: 'Low Quality', raw: 1 })).toBe('Low Quality: 1');
+    expect(tooltip.callbacks.label({ label: 'Sufficient', raw: 1 })).toBe('Sufficient: 1');
+    expect(tooltip.callbacks.label({ label: 'Exceptional', raw: 0 })).toBe('Exceptional: 0');
+  });
+
+  it('labels every category in the tooltip in Data View (percentage) mode', () => {
+    renderWithStore(
+      <PRQualityGraph
+        selectedTeams={selectedTeams}
+        qualityData={qualityData}
+        isDataViewActive
+        orderedTeamIds={['Team A']}
+        teamData={teamData}
+      />,
+    );
+
+    const { tooltip } = lastPieOptions.plugins;
+    expect(tooltip.callbacks.label({ label: 'Not Approved', raw: 0 })).toBe('Not Approved: 0.0%');
+    expect(tooltip.callbacks.label({ label: 'Low Quality', raw: 50 })).toBe('Low Quality: 50.0%');
+  });
+
+  it('renders the team member count from teamData', () => {
+    renderWithStore(
+      <PRQualityGraph
+        selectedTeams={selectedTeams}
+        qualityData={qualityData}
+        isDataViewActive={false}
+        orderedTeamIds={['Team A']}
+        teamData={teamData}
+      />,
+    );
+
+    expect(screen.getByText(/5 members/)).toBeInTheDocument();
+  });
+
+  it('defaults to 0 members when teamData is missing for a team', () => {
+    renderWithStore(
+      <PRQualityGraph
+        selectedTeams={selectedTeams}
+        qualityData={qualityData}
+        isDataViewActive={false}
+        orderedTeamIds={['Team A']}
+        teamData={{}}
+      />,
+    );
+
+    expect(screen.getByText(/0 members/)).toBeInTheDocument();
+  });
+});