diff --git a/app/routes/envios.py b/app/routes/envios.py
index c7bdbf1..7205cbb 100644
--- a/app/routes/envios.py
+++ b/app/routes/envios.py
@@ -1,8 +1,12 @@
+import httpx
+import traceback as tb
+
 from fastapi import APIRouter, Request, Depends, Query
 from fastapi.responses import JSONResponse
 from app.auth import get_current_user
 from app.database import get_connection
 from app.services.scheduler import sync_recientes
+from app.services.firebird_service import get_firebird_from_config
 
 router = APIRouter(prefix="/envios", tags=["envios"])
 
@@ -33,9 +37,66 @@ async def erp_sync_now(
     ventana_min: int = Query(default=30, ge=1, le=1440),
     user: dict = Depends(get_current_user),
 ):
-    import traceback as tb
     try:
         resultado = await sync_recientes(ventana_min=ventana_min)
         return JSONResponse(resultado)
     except Exception as e:
-        return JSONResponse({"ok": False, "error": str(e), "traceback": tb.format_exc()}, status_code=200)
+        return JSONResponse({"ok": False, "error": str(e), "traceback": tb.format_exc()})
+
+
+@router.post("/erp/sync-diagnosticos")
+async def erp_sync_diagnosticos(user: dict = Depends(get_current_user)):
+    """Migra los 12.422 diagnósticos CIE-10 de Firebird → WhatsApp en lotes de 500."""
+    try:
+        conn = get_connection()
+        configs = {row["key"]: row["value"] for row in conn.execute("SELECT * FROM config").fetchall()}
+        conn.close()
+
+        wa_url = configs.get("whatsapp_url", "").rstrip("/")
+        wa_key = configs.get("whatsapp_api_key", "")
+        if not wa_url or not wa_key:
+            return JSONResponse({"ok": False, "error": "whatsapp_url o whatsapp_api_key no configurados"})
+
+        fb, ok, msg = get_firebird_from_config(configs)
+        if not ok:
+            return JSONResponse({"ok": False, "error": f"Firebird: {msg}"})
+
+        ok_r, err_r, rows = fb.execute_query(
+            "SELECT TRIM(d.COD_DIAG) AS COD_DIAG, TRIM(d.CONCEPTO) AS CONCEPTO "
+            "FROM DIAGNOSTICO d ORDER BY d.COD_DIAG", None
+        )
+        fb.disconnect()
+
+        if not ok_r:
+            return JSONResponse({"ok": False, "error": f"Query Firebird: {err_r}"})
+
+        diagnosticos = [{"cod": r["COD_DIAG"], "concepto": r["CONCEPTO"]} for r in (rows or [])]
+        total = len(diagnosticos)
+        batch_size = 500
+        url = f"{wa_url}/api/lab/ingest_diagnosticos.php"
+        headers = {"Content-Type": "application/json", "X-Lab-Key": wa_key}
+
+        insertados = 0
+        errores = []
+        async with httpx.AsyncClient(timeout=60) as client:
+            for i in range(0, total, batch_size):
+                lote = diagnosticos[i:i + batch_size]
+                try:
+                    resp = await client.post(url, json={"rows": lote}, headers=headers)
+                    data = resp.json()
+                    if data.get("ok"):
+                        insertados += data.get("insertados", len(lote))
+                    else:
+                        errores.append(f"Lote {i}-{i+len(lote)}: {data.get('error', '?')}")
+                except Exception as ex:
+                    errores.append(f"Lote {i}-{i+len(lote)}: {ex}")
+
+        return JSONResponse({
+            "ok":        len(errores) == 0,
+            "total":     total,
+            "insertados": insertados,
+            "lotes":     (total + batch_size - 1) // batch_size,
+            "errores":   errores,
+        })
+    except Exception as e:
+        return JSONResponse({"ok": False, "error": str(e), "traceback": tb.format_exc()})
diff --git a/app/templates/envios_erp.html b/app/templates/envios_erp.html
index 80bd87d..f40d328 100644
--- a/app/templates/envios_erp.html
+++ b/app/templates/envios_erp.html
@@ -78,6 +78,26 @@
                     </div>
                 </div>
 
+                <!-- Migración diagnósticos CIE-10 -->
+                <div class="bg-white rounded-xl shadow-sm border border-gray-200">
+                    <div class="px-6 py-4 border-b border-gray-200 flex items-center justify-between">
+                        <h3 class="font-semibold text-gray-800">
+                            <i class="fas fa-stethoscope mr-2 text-orange-400"></i>Migración CIE-10
+                        </h3>
+                        <span class="text-xs text-gray-400">12.422 diagnósticos de Firebird → WhatsApp</span>
+                    </div>
+                    <div class="p-5 flex flex-wrap items-center gap-4">
+                        <p class="text-sm text-gray-500 flex-1">Ejecutar una vez para poblar la tabla <code class="bg-gray-100 px-1 rounded">cie10_diagnosticos</code> en WhatsApp. Requiere correr la migración SQL primero.</p>
+                        <button id="btn-sync-diag" onclick="ejecutarSyncDiag()"
+                            class="flex items-center gap-2 bg-orange-500 hover:bg-orange-600 text-white text-sm font-medium px-4 py-2 rounded-lg transition-colors whitespace-nowrap">
+                            <i class="fas fa-upload text-xs"></i> Migrar diagnósticos
+                        </button>
+                    </div>
+                    <div id="sync-diag-result" class="hidden px-5 pb-4">
+                        <div id="sync-diag-inner"></div>
+                    </div>
+                </div>
+
                 <!-- Prueba manual -->
                 <div class="bg-white rounded-xl shadow-sm border border-gray-200">
                     <div class="px-6 py-4 border-b border-gray-200">
@@ -158,6 +178,36 @@ function switchTab(name) {
 const _origenLabel = { manual: 'Manual', tercero: 'Tercero', scheduler: 'Scheduler', automation: 'Automatización' };
 const _modoLabel   = { insertar: 'Solo nuevos', upsert: 'Upsert' };
 
+async function ejecutarSyncDiag() {
+    const btn = document.getElementById('btn-sync-diag');
+    const resBox = document.getElementById('sync-diag-result');
+    const inner  = document.getElementById('sync-diag-inner');
+    btn.disabled = true;
+    btn.innerHTML = '<i class="fas fa-spinner fa-spin text-xs"></i> Migrando…';
+    resBox.classList.remove('hidden');
+    inner.innerHTML = '<p class="text-sm text-gray-400">Enviando 12.422 diagnósticos en lotes de 500…</p>';
+    try {
+        const resp = await fetch('/envios/erp/sync-diagnosticos', { method: 'POST' });
+        const d = await resp.json();
+        if (d.ok) {
+            inner.innerHTML = `<div class="text-sm text-green-700 bg-green-50 border border-green-200 rounded-lg px-4 py-3">
+                <i class="fas fa-check-circle mr-1"></i>
+                <strong>${d.insertados.toLocaleString()}</strong> diagnósticos migrados en <strong>${d.lotes}</strong> lotes.
+            </div>`;
+        } else {
+            inner.innerHTML = `<div class="text-sm text-red-600 bg-red-50 border border-red-200 rounded-lg px-4 py-3">
+                <i class="fas fa-exclamation-circle mr-1"></i>${d.error || 'Error'}
+                ${d.errores?.length ? '<ul class="mt-1 ml-4 list-disc text-xs">' + d.errores.map(e => `<li>${e}</li>`).join('') + '</ul>' : ''}
+            </div>`;
+        }
+    } catch(e) {
+        inner.innerHTML = `<p class="text-sm text-red-500">Error de red: ${e.message}</p>`;
+    } finally {
+        btn.disabled = false;
+        btn.innerHTML = '<i class="fas fa-upload text-xs"></i> Migrar diagnósticos';
+    }
+}
+
 function toggleDet(id) {
     const row = document.getElementById(id);
     if (row) row.classList.toggle('hidden');