diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index e69de29bb..d537656d1 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -0,0 +1 @@
+* Fixed ID verification issues for resources
\ No newline at end of file
diff --git a/org.hl7.fhir.r5/src/test/java/org/hl7/fhir/r5/formats/FormatUtilitiesTest.java b/org.hl7.fhir.r5/src/test/java/org/hl7/fhir/r5/formats/FormatUtilitiesTest.java
new file mode 100644
index 000000000..b7ab1d337
--- /dev/null
+++ b/org.hl7.fhir.r5/src/test/java/org/hl7/fhir/r5/formats/FormatUtilitiesTest.java
@@ -0,0 +1,32 @@
+package org.hl7.fhir.r5.formats;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class FormatUtilitiesTest {
+
+  private static Stream<Arguments> provideIdsWithOutcomes() {
+    return Stream.of(
+      Arguments.of("1234", true),
+      Arguments.of("12-34", true),
+      Arguments.of("12_34", false),
+      Arguments.of("12.34", true),
+      Arguments.of("12/34", false),
+      Arguments.of("1234#", false),
+      Arguments.of("31415926535897932384626433832795028841971693993751058209749445923", false) // 65 digits
+    );
+  }
+
+  @ParameterizedTest
+  @MethodSource("provideIdsWithOutcomes")
+  void isValidIdTest(String id, boolean expected) {
+    Assertions.assertEquals(FormatUtilities.isValidId(id), expected);
+  }
+}
\ No newline at end of file
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java
index d172023c2..aaf2bf313 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/instance/InstanceValidator.java
@@ -5194,31 +5194,13 @@ public class InstanceValidator extends BaseValidator implements IResourceValidat
         Element eid = element.getNamedChild(ID);
         if (eid.getProperty() != null && eid.getProperty().getDefinition() != null && eid.getProperty().getDefinition().getBase().getPath().equals("Resource.id")) {
           NodeStack ns = stack.push(eid, -1, eid.getProperty().getDefinition(), null);
-          rule(errors, IssueType.INVALID, eid.line(), eid.col(), ns.getLiteralPath(), idFormattedCorrectly(eid.getValue()), I18nConstants.RESOURCE_RES_ID_MALFORMED);
+          rule(errors, IssueType.INVALID, eid.line(), eid.col(), ns.getLiteralPath(), FormatUtilities.isValidId(eid.primitiveValue()), I18nConstants.RESOURCE_RES_ID_MALFORMED);
         }
       }
       start(hostContext, errors, element, element, defn, stack); // root is both definition and type
     }
   }
 
-  /**
-   * FHIR IDs are constrained to any combination of upper- or lower-case ASCII letters ('A'..'Z', and 'a'..'z',
-   * numerals ('0'..'9'), '-' and '.', with a length limit of 64 characters. (This might be an integer, an un-prefixed
-   * OID, UUID or any other identifier pattern that meets these constraints.)
-   *
-   * As a heads up, a null String will pass this check.
-   *
-   * @param id The id to verify conformance to specification requirements.
-   * @return {@link Boolean#TRUE} if the passed in ID is a valid resource ID, {@link Boolean#FALSE} otherwise.
-   */
-  protected static boolean idFormattedCorrectly(@Nonnull String id) {
-    String idRegex = "[A-Za-z0-9\\-\\.]{1,64}";
-    Pattern pattern = Pattern.compile(idRegex);
-    Matcher matcher = pattern.matcher(id);
-    return matcher.matches();
-  }
-
-
   private NodeStack getFirstEntry(NodeStack bundle) {
     List<Element> list = new ArrayList<Element>();
     bundle.getElement().getNamedChildren(ENTRY, list);
diff --git a/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/instance/InstanceValidatorTest.java b/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/instance/InstanceValidatorTest.java
index ad2aa6688..f5e9291c3 100644
--- a/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/instance/InstanceValidatorTest.java
+++ b/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/instance/InstanceValidatorTest.java
@@ -13,21 +13,5 @@ import static org.junit.jupiter.api.Assertions.*;
 class InstanceValidatorTest {
 
 
-  private static Stream<Arguments> provideIdsWithOutcomes() {
-    return Stream.of(
-      Arguments.of("1234", true),
-      Arguments.of("12-34", true),
-      Arguments.of("12_34", false),
-      Arguments.of("12.34", true),
-      Arguments.of("12/34", false),
-      Arguments.of("1234#", false),
-      Arguments.of("31415926535897932384626433832795028841971693993751058209749445923", false) // 65 digits
-    );
-  }
 
-  @ParameterizedTest
-  @MethodSource("provideIdsWithOutcomes")
-  void idFormattedCorrectly(String id, boolean expected) {
-    Assertions.assertEquals(InstanceValidator.idFormattedCorrectly(id), expected);
-  }
 }
\ No newline at end of file