diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Enumerations.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Enumerations.java
index 7ff2f46fa..334507465 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Enumerations.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/model/Enumerations.java
@@ -6824,6 +6824,10 @@ public String toCode(int len) {
         public String toString() {
           return toCode();
         }
+        
+        public boolean isR4B() {
+          return toCode().startsWith("4.0");
+        }
 // end addition
     }