diff --git a/apps/Backend/src/routes/claims.ts b/apps/Backend/src/routes/claims.ts
index 4c6c5950..1fdae023 100755
--- a/apps/Backend/src/routes/claims.ts
+++ b/apps/Backend/src/routes/claims.ts
@@ -759,6 +759,13 @@ router.post(
             return [{ originalname: f.filename, bufferBase64, mimetype: f.mimeType ?? "application/octet-stream" }];
           });
 
+          // DDMA/TuftsSCO/UnitedDH Selenium workers read claim.claimFiles and attach
+          // straight from disk via filePath (unlike MH/CCA, which get base64 buffers above).
+          const diskClaimFiles = allFileMeta.filter((f) => {
+            if (!f.filePath) return false;
+            return fs.existsSync(path.join(process.cwd(), f.filePath));
+          });
+
           // Base claim data shared across all insurance pathways
           const baseClaimPayload: any = {
             patientId: Number(patient.id),
@@ -826,6 +833,7 @@ router.post(
                 massddmaUsername: credentials.username,
                 massddmaPassword: credentials.password,
                 providerName: resolvedNpiProvider?.providerName ?? "",
+                claimFiles: diskClaimFiles,
               },
             };
             jobId = enqueueSeleniumJob({
@@ -842,6 +850,7 @@ router.post(
                 insuranceSiteKey: "TuftsSCO",
                 dentaquestUsername: credentials.username,
                 dentaquestPassword: credentials.password,
+                claimFiles: diskClaimFiles,
               },
             };
             jobId = enqueueSeleniumJob({
@@ -858,6 +867,7 @@ router.post(
                 insuranceSiteKey: "UNITED_SCO",
                 uniteddhUsername: credentials.username,
                 uniteddhPassword: credentials.password,
+                claimFiles: diskClaimFiles,
               },
             };
             jobId = enqueueSeleniumJob({