diff --git a/library/ftx/ftx_loinc_services.pas b/library/ftx/ftx_loinc_services.pas
index 329843407..1b45d9a99 100644
--- a/library/ftx/ftx_loinc_services.pas
+++ b/library/ftx/ftx_loinc_services.pas
@@ -917,12 +917,12 @@ function TLOINCServices.doesFilter(opContext : TTxOperationContext; prop: String
   reg : TRegularExpression;
 begin
   result := false;
-  if (FRelationships.ContainsKey(prop) and (op = foEqual)) then
+  if (FRelationships.ContainsKey(prop) and (op in [foEqual, foIn])) then
     if FCodes.ContainsKey(value) then
       result := true
     else
       result := true
-  else if (FProperties.ContainsKey(prop) and (op = foEqual)) then
+  else if (FProperties.ContainsKey(prop) and (op in [foEqual, foIn])) then
     result := true
   else if (FRelationships.ContainsKey(prop) and (op = foExists)) then
     if FCodes.ContainsKey(value) then
diff --git a/release-notes.md b/release-notes.md
index b3d636a04..12352aa1e 100644
--- a/release-notes.md
+++ b/release-notes.md
@@ -1,7 +1,7 @@
 ## Change Notes:
 
-* 
+* Fix LOINC filter on $validate-code
 
 ## Conformance Notes:
 
-* 
\ No newline at end of file
+* tx.fhir.org passed all 299 HL7 terminology service tests (mode 'tx.fhir.org', tests v1.7.5, runner v6.5.9)
\ No newline at end of file