diff --git a/src/viewer/app.py b/src/viewer/app.py
index 4d91c2d..cfa39a4 100644
--- a/src/viewer/app.py
+++ b/src/viewer/app.py
@@ -15,7 +15,11 @@ from werkzeug.utils import secure_filename
 
 from collections import Counter
 
-from ..config import STRUCTURED_DIR, OLLAMA_URL, CCAM_DICT_PATH, DossierMedical, ALLOWED_EXTENSIONS, UPLOAD_MAX_SIZE_MB
+from ..config import (
+    STRUCTURED_DIR, OLLAMA_URL, CCAM_DICT_PATH, DossierMedical,
+    ALLOWED_EXTENSIONS, UPLOAD_MAX_SIZE_MB,
+    CIM10_PDF, GUIDE_METHODO_PDF, CCAM_PDF, CIM10_DICT_PATH, CIM10_SUPPLEMENTS_PATH,
+)
 from .. import config as cfg
 from .referentiels import ReferentielManager
 
@@ -154,6 +158,43 @@ def collect_cpam_controls(groups: dict[str, list[dict]]) -> list[dict]:
     return controls
 
 
+def get_builtin_referentiels() -> list[dict]:
+    """Retourne les infos sur les référentiels intégrés (PDFs + dicts)."""
+    rag_index_meta = Path(STRUCTURED_DIR).parent / "data" / "rag_index" / "metadata.json"
+    chunks_by_doc: dict[str, int] = {}
+    if rag_index_meta.exists():
+        try:
+            import json as _json
+            meta = _json.loads(rag_index_meta.read_text(encoding="utf-8"))
+            for m in meta:
+                doc = m.get("document", "")
+                chunks_by_doc[doc] = chunks_by_doc.get(doc, 0) + 1
+        except Exception:
+            pass
+
+    refs = []
+    builtin_sources = [
+        ("CIM-10 FR 2026", CIM10_PDF, ".pdf", ["cim10", "cim10_alpha"]),
+        ("Guide Méthodologique MCO 2026", GUIDE_METHODO_PDF, ".pdf", ["guide_methodo"]),
+        ("CCAM 2025", CCAM_PDF, ".pdf", ["ccam"]),
+        ("Dictionnaire CIM-10", CIM10_DICT_PATH, ".json", []),
+        ("Suppléments CIM-10", CIM10_SUPPLEMENTS_PATH, ".json", []),
+        ("Dictionnaire CCAM", CCAM_DICT_PATH, ".json", []),
+    ]
+    for name, path, ext, doc_keys in builtin_sources:
+        size_mb = path.stat().st_size / (1024 * 1024) if path.exists() else 0
+        chunks = sum(chunks_by_doc.get(k, 0) for k in doc_keys)
+        refs.append({
+            "name": name,
+            "filename": path.name,
+            "extension": ext,
+            "size_mb": size_mb,
+            "chunks": chunks,
+            "exists": path.exists(),
+        })
+    return refs
+
+
 def load_ccam_dict() -> dict[str, dict]:
     """Charge le dictionnaire CCAM pour les regroupements."""
     if CCAM_DICT_PATH.exists():
@@ -424,7 +465,8 @@ def create_app() -> Flask:
     @app.route("/admin/referentiels")
     def admin_referentiels():
         refs = ref_manager.list_all()
-        return render_template("admin_referentiels.html", referentiels=refs, max_size=UPLOAD_MAX_SIZE_MB)
+        builtin = get_builtin_referentiels()
+        return render_template("admin_referentiels.html", referentiels=refs, builtin_refs=builtin, max_size=UPLOAD_MAX_SIZE_MB)
 
     @app.route("/admin/referentiels/upload", methods=["POST"])
     def upload_referentiel():
diff --git a/src/viewer/templates/admin_referentiels.html b/src/viewer/templates/admin_referentiels.html
index c84b5e2..bdbce7c 100644
--- a/src/viewer/templates/admin_referentiels.html
+++ b/src/viewer/templates/admin_referentiels.html
@@ -34,10 +34,56 @@
   </p>
 </div>
 
-<!-- Tableau référentiels -->
+<!-- Référentiels intégrés (built-in) -->
+<div class="card" style="margin-bottom:1.5rem;">
+  <h3>Référentiels intégrés</h3>
+  <p style="font-size:0.8rem;color:#64748b;margin-bottom:0.75rem;">
+    Sources intégrées automatiquement dans l'index FAISS au build.
+  </p>
+  <table>
+    <thead>
+      <tr>
+        <th>Nom</th>
+        <th>Fichier</th>
+        <th>Type</th>
+        <th>Taille</th>
+        <th>Chunks</th>
+        <th>Statut</th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for ref in builtin_refs %}
+      <tr>
+        <td style="font-weight:600;">{{ ref.name }}</td>
+        <td style="font-size:0.8rem;color:#64748b;"><code>{{ ref.filename }}</code></td>
+        <td><span class="badge" style="background:#f1f5f9;color:#334155;">{{ ref.extension }}</span></td>
+        <td>{{ "%.1f"|format(ref.size_mb) }} Mo</td>
+        <td>
+          {% if ref.chunks %}
+            <strong>{{ ref.chunks }}</strong>
+          {% else %}
+            <span style="color:#94a3b8;">—</span>
+          {% endif %}
+        </td>
+        <td>
+          {% if not ref.exists %}
+            <span class="badge" style="background:#fee2e2;color:#dc2626;">Fichier absent</span>
+          {% elif ref.chunks %}
+            <span class="badge" style="background:#dcfce7;color:#16a34a;">Indexé</span>
+          {% else %}
+            <span class="badge" style="background:#f1f5f9;color:#64748b;">Dictionnaire</span>
+          {% endif %}
+        </td>
+      </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+</div>
+
+<!-- Tableau référentiels utilisateur -->
 <div class="card">
   <div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:0.75rem;">
-    <h3>Référentiels indexés</h3>
+    <h3>Référentiels utilisateur</h3>
     <button id="rebuild-btn"
       style="padding:0.35rem 0.75rem;border-radius:6px;border:1px solid #e2e8f0;background:#fff;font-size:0.75rem;cursor:pointer;">
       Rebuild complet