diff --git a/src/main/java/gov/cms/madie/terminology/service/FhirTerminologyService.java b/src/main/java/gov/cms/madie/terminology/service/FhirTerminologyService.java
index d5c7803..213253d 100644
--- a/src/main/java/gov/cms/madie/terminology/service/FhirTerminologyService.java
+++ b/src/main/java/gov/cms/madie/terminology/service/FhirTerminologyService.java
@@ -380,7 +380,7 @@ private void recursiveRetrieveCodeSystems(
               codeSystemsPage.add(
                   CodeSystem.builder()
                       .id(codeSystem.getTitle() + codeSystem.getVersion())
-                      .fullUrl(codeSystem.getUrl())
+                      .fullUrl(entry.getFullUrl())
                       .title(codeSystem.getTitle())
                       .name(codeSystem.getName())
                       .version(codeSystem.getVersion())