diff --git a/atlas/templates/atlas/user_uploads.html b/atlas/templates/atlas/user_uploads.html
index e79ab319..5d6cdf6e 100644
--- a/atlas/templates/atlas/user_uploads.html
+++ b/atlas/templates/atlas/user_uploads.html
@@ -130,6 +130,7 @@
                     type="button"
                     class="btn btn-primary"
             >Import {% if case %}into case{% endif %}</button>
+            <button id="import-into-case-button" type="button" class="btn btn-outline-primary" data-bs-toggle="modal" data-bs-target="#caseSelectModal">Import into case…</button>
         </div>
 
         <div id="import-status"></div>
@@ -167,7 +168,104 @@
         </div>
     </div>
 
+    <!-- Case select modal for importing into an existing case -->
+    <div class="modal fade" id="caseSelectModal" tabindex="-1" aria-hidden="true">
+        <div class="modal-dialog modal-lg modal-dialog-centered">
+            <div class="modal-content">
+                <div class="modal-header">
+                    <h5 class="modal-title">Import into case</h5>
+                    <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+                </div>
+                <div class="modal-body">
+                    <div class="mb-2">
+                        <label for="case-search-input-modal" class="form-label">Search cases</label>
+                        <input id="case-search-input-modal" name="q" class="form-control" type="search"
+                          placeholder="Type to search cases..."
+                          hx-get="{% url 'atlas:case_search' %}"
+                          hx-include="#case-search-input-modal"
+                          hx-target="#case-search-results-modal"
+                          hx-trigger="keyup changed delay:400ms"
+                          autocomplete="off">
+                    </div>
+                    <div id="case-search-results-modal" class="mt-2">
+                        <!-- initial empty state; results will be loaded by HTMX -->
+                        <div class="text-muted small">Type to search cases to import into.</div>
+                    </div>
+                </div>
+                <div class="modal-footer">
+                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
+                </div>
+            </div>
+        </div>
+    </div>
+
     <script>
+        // Handle selecting a case from the modal results to import selected series into it
+        document.body.addEventListener('click', async function (e) {
+            // Only handle clicks inside the case select modal results
+            const anchor = e.target.closest('#case-search-results-modal .list-group-item, #case-search-results-modal .list-group-item-action');
+            if (!anchor) return;
+            e.preventDefault();
+            // Determine case pk: prefer data-case-pk, else parse from href
+            let casePk = anchor.getAttribute('data-case-pk');
+            if (!casePk) {
+                const href = anchor.getAttribute('href') || '';
+                const m = href.match(/case\/(\d+)\/?$/);
+                if (m) casePk = m[1];
+            }
+            if (!casePk) {
+                console.error('Could not determine case id for import');
+                return;
+            }
+
+            // Gather selected series (same logic as import button)
+            const selected = Array.from(document.querySelectorAll('input[name="selection"]:checked'))
+                .filter(cb => !cb.disabled)
+                .map(cb => cb.value);
+            const allCheckboxes = Array.from(document.querySelectorAll('input[name="selection"]'));
+            const selectable = allCheckboxes.filter(cb => !cb.disabled).map(cb => cb.value);
+            const selection = selected.length ? selected : selectable;
+            if (!selection.length) {
+                alert('Please select at least one series to import into the case.');
+                return;
+            }
+
+            // Build import URL template and replace trailing 0 with casePk
+            const importTemplate = "{% url 'api-1:import_dicoms_case' 0 %}";
+            const importUrl = importTemplate.replace(/0\/?$/, casePk + '/');
+
+            const form = new URLSearchParams();
+            for (const s of selection) form.append('selection', s);
+            const orderSeriesInput = document.querySelector('input[name="order-series"]:checked');
+            if (orderSeriesInput) form.append('order-series', orderSeriesInput.value);
+
+            const csrfToken = '{{ csrf_token }}';
+
+            try {
+                const resp = await fetch(importUrl, {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/x-www-form-urlencoded',
+                        'X-CSRFToken': csrfToken,
+                    },
+                    body: form.toString(),
+                    credentials: 'same-origin'
+                });
+                const text = await resp.text();
+                // Close modal and show result in import-status
+                const modalEl = document.getElementById('caseSelectModal');
+                if (modalEl && window.bootstrap && bootstrap.Modal) {
+                    bootstrap.Modal.getInstance(modalEl)?.hide();
+                }
+                const statusDiv = document.getElementById('import-status');
+                if (statusDiv) statusDiv.innerHTML = `<div>Imported into case ${casePk}: ${text}</div>`;
+                // Optionally reload to reflect imported state
+                setTimeout(function(){ location.reload(); }, 1200);
+            } catch (err) {
+                console.error('Import into case failed', err);
+                alert('Import failed — check console for details.');
+            }
+        });
         // Update the selected count shown beside action buttons
         function updateSelectionCount() {
             const all = Array.from(document.querySelectorAll('input[name="selection"]'));