diff --git a/Media.JoshHeaps.Net/Pages/MedicalDocs.cshtml b/Media.JoshHeaps.Net/Pages/MedicalDocs.cshtml
index 81b0c5b..abd2830 100644
--- a/Media.JoshHeaps.Net/Pages/MedicalDocs.cshtml
+++ b/Media.JoshHeaps.Net/Pages/MedicalDocs.cshtml
@@ -273,6 +273,18 @@
     </div>
 </div>
 
+<!-- Document Viewer Modal -->
+<div class="doc-viewer-overlay" id="docViewerOverlay" style="display:none" onclick="medDocsCloseViewer(event)">
+    <div class="doc-viewer-modal" onclick="event.stopPropagation()">
+        <div class="doc-viewer-header">
+            <span class="doc-viewer-title" id="docViewerTitle"></span>
+            <button class="doc-viewer-close" onclick="medDocsCloseViewer()" title="Close">&times;</button>
+        </div>
+        <div class="doc-viewer-body" id="docViewerBody">
+        </div>
+    </div>
+</div>
+
 @section Scripts {
     <script src="~/js/medical-docs/state.js" asp-append-version="true"></script>
     <script src="~/js/medical-docs/tabs.js" asp-append-version="true"></script>
diff --git a/Media.JoshHeaps.Net/wwwroot/css/medical-docs.css b/Media.JoshHeaps.Net/wwwroot/css/medical-docs.css
index b71b9d5..189a697 100644
--- a/Media.JoshHeaps.Net/wwwroot/css/medical-docs.css
+++ b/Media.JoshHeaps.Net/wwwroot/css/medical-docs.css
@@ -1369,6 +1369,131 @@
     line-height: 1.6;
 }
 
+/* ======================== */
+/* Document Viewer Modal     */
+/* ======================== */
+
+.doc-viewer-overlay {
+    position: fixed;
+    inset: 0;
+    z-index: 1000;
+    background: rgba(0, 0, 0, 0.7);
+    backdrop-filter: blur(4px);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    padding: 20px;
+}
+
+.doc-viewer-modal {
+    background: var(--bg-primary);
+    border: 1px solid var(--border-primary);
+    border-radius: 12px;
+    display: flex;
+    flex-direction: column;
+    max-width: 90vw;
+    max-height: 90vh;
+    width: auto;
+    min-width: 300px;
+    overflow: hidden;
+}
+
+.doc-viewer-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 12px 16px;
+    border-bottom: 1px solid var(--border-primary);
+    flex-shrink: 0;
+}
+
+.doc-viewer-title {
+    font-size: 14px;
+    font-weight: 500;
+    color: var(--text-primary);
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    min-width: 0;
+}
+
+.doc-viewer-close {
+    background: none;
+    border: none;
+    color: var(--text-secondary);
+    font-size: 24px;
+    line-height: 1;
+    cursor: pointer;
+    padding: 0 4px;
+    flex-shrink: 0;
+    margin-left: 12px;
+    transition: color 0.2s ease;
+}
+
+.doc-viewer-close:hover {
+    color: var(--text-primary);
+}
+
+.doc-viewer-body {
+    padding: 16px;
+    overflow: auto;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    flex: 1;
+    min-height: 0;
+}
+
+.doc-viewer-loading,
+.doc-viewer-error {
+    color: var(--text-secondary);
+    font-size: 14px;
+    padding: 40px 20px;
+    text-align: center;
+}
+
+.doc-viewer-error {
+    color: var(--danger);
+}
+
+.doc-viewer-image {
+    max-width: 100%;
+    max-height: calc(90vh - 80px);
+    object-fit: contain;
+    border-radius: 4px;
+}
+
+.doc-viewer-audio {
+    width: 100%;
+    min-width: 300px;
+    max-width: 500px;
+}
+
+.doc-viewer-pdf {
+    width: 80vw;
+    height: calc(90vh - 80px);
+    max-width: 100%;
+    border: none;
+    border-radius: 4px;
+}
+
+.doc-viewer-text {
+    font-family: inherit;
+    font-size: 14px;
+    color: var(--text-primary);
+    background: var(--bg-secondary);
+    border: 1px solid var(--border-primary);
+    border-radius: 6px;
+    padding: 16px;
+    max-height: calc(90vh - 120px);
+    overflow-y: auto;
+    white-space: pre-wrap;
+    word-wrap: break-word;
+    width: 100%;
+    margin: 0;
+    line-height: 1.6;
+}
+
 /* ======================== */
 /* Responsive (<=768px)      */
 /* ======================== */
@@ -1532,6 +1657,23 @@
     .doc-detail-row-inline > div[style*="grid-column"] {
         grid-column: auto !important;
     }
+
+    .doc-viewer-overlay {
+        padding: 0;
+    }
+
+    .doc-viewer-modal {
+        max-width: 100vw;
+        max-height: 100vh;
+        width: 100vw;
+        height: 100vh;
+        border-radius: 0;
+    }
+
+    .doc-viewer-pdf {
+        width: 100%;
+        height: calc(100vh - 80px);
+    }
 }
 
 /* ======================== */
diff --git a/Media.JoshHeaps.Net/wwwroot/js/medical-docs/documents.js b/Media.JoshHeaps.Net/wwwroot/js/medical-docs/documents.js
index 97fcf36..1280357 100644
--- a/Media.JoshHeaps.Net/wwwroot/js/medical-docs/documents.js
+++ b/Media.JoshHeaps.Net/wwwroot/js/medical-docs/documents.js
@@ -78,6 +78,18 @@
         select.value = currentVal;
     };
 
+    // --- Viewer ---
+
+    app.getViewerType = function (doc) {
+        if (doc.documentType === 'note') return 'text';
+        const mime = (doc.mimeType || '').toLowerCase();
+        if (mime.startsWith('image/')) return 'image';
+        if (mime.startsWith('audio/')) return 'audio';
+        if (mime.startsWith('text/')) return 'text';
+        if (mime === 'application/pdf') return 'pdf';
+        return null;
+    };
+
     // --- Documents ---
 
     app.loadDocuments = async function () {
@@ -135,6 +147,11 @@
 
             const aiStatusBadge = app.getAiStatusBadge(doc);
 
+            const viewerType = app.getViewerType(doc);
+            const viewBtn = viewerType
+                ? `<button onclick="event.stopPropagation(); medDocsView(${doc.id})">View</button>`
+                : '';
+
             const downloadBtn = doc.documentType === 'file'
                 ? `<button onclick="event.stopPropagation(); medDocsDownload(${doc.id}, '${app.escapeAttr(doc.fileName || 'download')}')">Download</button>`
                 : '';
@@ -166,6 +183,7 @@
                     </div>
                     <div class="doc-actions" onclick="event.stopPropagation()">
                         ${processBtn}
+                        ${viewBtn}
                         ${downloadBtn}
                         <button class="delete-btn" onclick="medDocsDelete(${doc.id})">Delete</button>
                     </div>
@@ -293,6 +311,79 @@
         document.body.removeChild(a);
     };
 
+    // --- Document Viewer ---
+
+    let currentBlobUrl = null;
+
+    window.medDocsView = async function (id) {
+        const doc = state.currentDocuments.find(d => d.id === id);
+        if (!doc) return;
+
+        const viewerType = app.getViewerType(doc);
+        if (!viewerType) return;
+
+        const overlay = document.getElementById('docViewerOverlay');
+        const title = document.getElementById('docViewerTitle');
+        const body = document.getElementById('docViewerBody');
+
+        title.textContent = doc.title || doc.fileName || 'Untitled';
+        body.innerHTML = '<div class="doc-viewer-loading">Loading...</div>';
+        overlay.style.display = '';
+        document.body.style.overflow = 'hidden';
+
+        if (doc.documentType === 'note') {
+            body.innerHTML = `<pre class="doc-viewer-text">${app.escapeHtml(doc.description || '')}</pre>`;
+            return;
+        }
+
+        try {
+            const res = await fetch(`${app.API}/documents/${id}/download`);
+            if (!res.ok) {
+                body.innerHTML = '<div class="doc-viewer-error">Failed to load document.</div>';
+                return;
+            }
+
+            const blob = await res.blob();
+            currentBlobUrl = URL.createObjectURL(blob);
+
+            if (viewerType === 'image') {
+                body.innerHTML = `<img class="doc-viewer-image" src="${currentBlobUrl}" alt="${app.escapeAttr(doc.title || doc.fileName || '')}" />`;
+            } else if (viewerType === 'audio') {
+                body.innerHTML = `<audio class="doc-viewer-audio" controls src="${currentBlobUrl}"></audio>`;
+            } else if (viewerType === 'pdf') {
+                body.innerHTML = `<iframe class="doc-viewer-pdf" src="${currentBlobUrl}"></iframe>`;
+            } else if (viewerType === 'text') {
+                const text = await blob.text();
+                body.innerHTML = `<pre class="doc-viewer-text">${app.escapeHtml(text)}</pre>`;
+                URL.revokeObjectURL(currentBlobUrl);
+                currentBlobUrl = null;
+            }
+        } catch {
+            body.innerHTML = '<div class="doc-viewer-error">Error loading document.</div>';
+        }
+    };
+
+    window.medDocsCloseViewer = function (event) {
+        if (event && event.target !== event.currentTarget) return;
+        const overlay = document.getElementById('docViewerOverlay');
+        overlay.style.display = 'none';
+        document.getElementById('docViewerBody').innerHTML = '';
+        document.body.style.overflow = '';
+        if (currentBlobUrl) {
+            URL.revokeObjectURL(currentBlobUrl);
+            currentBlobUrl = null;
+        }
+    };
+
+    document.addEventListener('keydown', function (e) {
+        if (e.key === 'Escape') {
+            const overlay = document.getElementById('docViewerOverlay');
+            if (overlay && overlay.style.display !== 'none') {
+                window.medDocsCloseViewer();
+            }
+        }
+    });
+
     window.medDocsDelete = async function (id) {
         if (!confirm('Delete this document? This cannot be undone.')) return;