diff --git a/src/main/java/org/cbioportal/persistence/StudyViewRepository.java b/src/main/java/org/cbioportal/persistence/StudyViewRepository.java
index 5c3ee61a9c3..32ae1444d15 100644
--- a/src/main/java/org/cbioportal/persistence/StudyViewRepository.java
+++ b/src/main/java/org/cbioportal/persistence/StudyViewRepository.java
@@ -44,13 +44,15 @@ public interface StudyViewRepository {
     
     List<GenomicDataCount> getMolecularProfileSampleCounts(StudyViewFilterContext studyViewFilterContext);
     
-    List<ClinicalAttribute> getClinicalAttributes();
-    
     Map<String, ClinicalDataType> getClinicalAttributeDatatypeMap();
 
     List<CaseListDataCount> getCaseListDataCountsPerStudy(StudyViewFilterContext studyViewFilterContext);
 
     Map<String, Integer> getTotalProfiledCounts(StudyViewFilterContext studyViewFilterContext, String alterationType);
+
+    List<ClinicalAttribute> getClinicalAttributes();
+
+    List<ClinicalAttribute> getClinicalAttributesForStudies(List<String> studyIds);
     
     int getFilteredSamplesCount(StudyViewFilterContext studyViewFilterContext);
     
diff --git a/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.java b/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.java
index 97419bcf06b..fa3a92fd898 100644
--- a/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.java
+++ b/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.java
@@ -47,6 +47,8 @@ public interface StudyViewMapper {
     
     List<ClinicalAttribute> getClinicalAttributes();
     
+    List<ClinicalAttribute> getClinicalAttributesForStudies(List<String> studyIds);
+    
     List<ClinicalData> getSampleClinicalDataFromStudyViewFilter(StudyViewFilterHelper studyViewFilterHelper, List<String> attributeIds);
     
     List<ClinicalData> getPatientClinicalDataFromStudyViewFilter(StudyViewFilterHelper studyViewFilterHelper, List<String> attributeIds);
diff --git a/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMyBatisRepository.java b/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMyBatisRepository.java
index 74affd393db..46f75d53891 100644
--- a/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMyBatisRepository.java
+++ b/src/main/java/org/cbioportal/persistence/mybatisclickhouse/StudyViewMyBatisRepository.java
@@ -144,6 +144,11 @@ public Map<String, ClinicalDataType> getClinicalAttributeDatatypeMap() {
         
         return attributeDatatypeMap;
     }
+
+    @Override
+    public List<ClinicalAttribute> getClinicalAttributesForStudies(List<String> studyIds) {
+        return mapper.getClinicalAttributesForStudies(studyIds);
+    }
     
     @Override
     public List<CaseListDataCount> getCaseListDataCountsPerStudy(StudyViewFilterContext studyViewFilterContext) {
diff --git a/src/main/java/org/cbioportal/service/impl/StudyViewColumnarServiceImpl.java b/src/main/java/org/cbioportal/service/impl/StudyViewColumnarServiceImpl.java
index 19713980486..54cdf5e130a 100644
--- a/src/main/java/org/cbioportal/service/impl/StudyViewColumnarServiceImpl.java
+++ b/src/main/java/org/cbioportal/service/impl/StudyViewColumnarServiceImpl.java
@@ -2,6 +2,7 @@
 
 import org.cbioportal.model.AlterationCountByGene;
 import org.cbioportal.model.CaseListDataCount;
+import org.cbioportal.model.ClinicalAttribute;
 import org.cbioportal.model.ClinicalData;
 import org.cbioportal.model.ClinicalDataCount;
 import org.cbioportal.model.ClinicalDataCountItem;
@@ -19,6 +20,7 @@
 import org.cbioportal.service.StudyViewColumnarService;
 import org.cbioportal.service.exception.StudyNotFoundException;
 import org.cbioportal.service.treatment.TreatmentCountReportService;
+import org.cbioportal.service.util.StudyViewColumnarServiceUtil;
 import org.cbioportal.web.parameter.ClinicalDataType;
 import org.cbioportal.web.parameter.CustomSampleIdentifier;
 import org.cbioportal.web.parameter.GenericAssayDataBinFilter;
@@ -146,14 +148,51 @@ public List<AlterationCountByGene> getStructuralVariantGenes(StudyViewFilter stu
     public Map<String, ClinicalDataType> getClinicalAttributeDatatypeMap(StudyViewFilter studyViewFilter) {
         return studyViewRepository.getClinicalAttributeDatatypeMap();
     }
-
+    
     @Cacheable(
         cacheResolver = "staticRepositoryCacheOneResolver",
         condition = "@cacheEnabledConfig.getEnabledClickhouse() && @studyViewFilterUtil.isUnfiltered(#studyViewFilter)"
     )
     @Override
     public List<ClinicalDataCountItem> getClinicalDataCounts(StudyViewFilter studyViewFilter, List<String> filteredAttributes) {
-       return studyViewRepository.getClinicalDataCounts(createContext(studyViewFilter), filteredAttributes);
+
+        var context = createContext(studyViewFilter);
+
+        var involvedCancerStudies = studyViewFilter.getStudyIds();
+
+        var result = studyViewRepository.getClinicalDataCounts(context, filteredAttributes);
+
+        // attributes may be missing in result set because they have been filtered out
+        // e.g. if the filtered samples happen to have no SEX data, they will not appear in the list
+        // even though the inferred value of those attributes is NA
+        // the following code restores these counts for missing attributes
+        if (result.size() != filteredAttributes.size()) {
+            var attributes = getClinicalAttributesForStudies(involvedCancerStudies)
+                .stream()
+                .filter(attribute -> filteredAttributes.contains(attribute.getAttrId()))
+                .toList();
+
+            Integer filteredSampleCount = studyViewRepository.getFilteredSamplesCount(createContext(studyViewFilter));
+            Integer filteredPatientCount = studyViewRepository.getFilteredPatientCount(createContext(studyViewFilter));
+    
+            result = StudyViewColumnarServiceUtil.addClinicalDataCountsForMissingAttributes(
+                result,
+                attributes,
+                filteredSampleCount,
+                filteredPatientCount
+            );
+        }
+        
+        return StudyViewColumnarServiceUtil.mergeClinicalDataCounts(result);
+        
+    }
+
+    @Cacheable(
+        cacheResolver = "staticRepositoryCacheOneResolver",
+        condition = "@cacheEnabledConfig.getEnabledClickhouse()"
+    )
+    public List<ClinicalAttribute> getClinicalAttributesForStudies(List<String> studyIds) {
+        return studyViewRepository.getClinicalAttributesForStudies(studyIds).stream().toList();
     }
 
     @Cacheable(
diff --git a/src/main/java/org/cbioportal/service/util/StudyViewColumnarServiceUtil.java b/src/main/java/org/cbioportal/service/util/StudyViewColumnarServiceUtil.java
new file mode 100644
index 00000000000..4975cb9730b
--- /dev/null
+++ b/src/main/java/org/cbioportal/service/util/StudyViewColumnarServiceUtil.java
@@ -0,0 +1,63 @@
+package org.cbioportal.service.util;
+
+import org.cbioportal.model.ClinicalAttribute;
+import org.cbioportal.model.ClinicalDataCount;
+import org.cbioportal.model.ClinicalDataCountItem;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class StudyViewColumnarServiceUtil {
+    
+    private StudyViewColumnarServiceUtil() {}
+    
+    public static List<ClinicalDataCountItem> mergeClinicalDataCounts(
+        List<ClinicalDataCountItem> items
+    ) {
+        items.forEach(attr -> {
+            Map<String, List<ClinicalDataCount>> countsPerType = attr.getCounts().stream()
+                .collect(Collectors.groupingBy(ClinicalDataCount::getValue));
+            List<ClinicalDataCount> res = countsPerType.entrySet().stream().map(entry -> {
+                ClinicalDataCount mergedCount = new ClinicalDataCount();
+                mergedCount.setAttributeId(attr.getAttributeId());
+                mergedCount.setValue(entry.getKey());
+                mergedCount.setCount(entry.getValue().stream().mapToInt(ClinicalDataCount::getCount).sum());
+                return mergedCount;
+            }).toList();
+            attr.setCounts(res);
+        });
+        return items;
+    }
+
+    public static List<ClinicalDataCountItem> addClinicalDataCountsForMissingAttributes(
+        List<ClinicalDataCountItem> counts,
+        List<ClinicalAttribute> attributes, 
+        Integer filteredSampleCount,
+        Integer filteredPatientCount
+    ) {
+        Map<String, ClinicalDataCountItem> map = counts.stream()
+            .collect(Collectors.toMap(ClinicalDataCountItem::getAttributeId, item -> item));
+
+        List<ClinicalDataCountItem> result = new ArrayList<>(counts);
+        
+        attributes.forEach(attr -> {
+            Integer count = attr.getPatientAttribute().booleanValue() ? filteredPatientCount : filteredSampleCount;
+
+            if (!map.containsKey(attr.getAttrId())) {
+                ClinicalDataCountItem newItem = new ClinicalDataCountItem();
+                newItem.setAttributeId(attr.getAttrId());
+                ClinicalDataCount countObj = new ClinicalDataCount();
+                countObj.setCount(count);
+                countObj.setValue("NA");
+                countObj.setAttributeId(attr.getAttrId());
+                newItem.setCounts(List.of(countObj));
+                result.add(newItem);
+            }
+        });
+
+        return result;
+    }
+    
+    
+}
\ No newline at end of file
diff --git a/src/main/java/org/cbioportal/web/columnar/StudyViewColumnStoreController.java b/src/main/java/org/cbioportal/web/columnar/StudyViewColumnStoreController.java
index bd360e50f0a..0cef9299e37 100644
--- a/src/main/java/org/cbioportal/web/columnar/StudyViewColumnStoreController.java
+++ b/src/main/java/org/cbioportal/web/columnar/StudyViewColumnStoreController.java
@@ -210,7 +210,8 @@ public ResponseEntity<List<ClinicalDataCountItem>> fetchClinicalDataCounts(
         if (attributes.size() == 1) {
             NewStudyViewFilterUtil.removeClinicalDataFilter(attributes.getFirst().getAttributeId(), studyViewFilter.getClinicalDataFilters());
        }
-        List<ClinicalDataCountItem> result = studyViewColumnarService.getClinicalDataCounts(studyViewFilter, 
+        List<ClinicalDataCountItem> result = studyViewColumnarService.getClinicalDataCounts(
+            studyViewFilter,
             attributes.stream().map(ClinicalDataFilter::getAttributeId).collect(Collectors.toList()));
         return new ResponseEntity<>(result, HttpStatus.OK);
 
diff --git a/src/main/resources/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.xml b/src/main/resources/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.xml
index cd95eb0a2fb..cfab9988d2f 100644
--- a/src/main/resources/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.xml
+++ b/src/main/resources/org/cbioportal/persistence/mybatisclickhouse/StudyViewMapper.xml
@@ -443,6 +443,24 @@
         JOIN cancer_study cs on cs.cancer_study_id = cam.cancer_study_id
     </select>
 
+    <select id="getClinicalAttributesForStudies" resultType="org.cbioportal.model.ClinicalAttribute">
+        SELECT
+            attr_id as attrId,
+            datatype as dataType,
+            patient_attribute as patientAttribute,
+            cs.cancer_study_identifier cancerStudyIdentifier
+        FROM clinical_attribute_meta cammo
+                 JOIN cancer_study cs on cs.cancer_study_id = cammo.cancer_study_id
+        <where>
+            cancerStudyIdentifier IN
+            <foreach item="studyId" collection="studyIds" open="(" separator="," close=")">
+                #{studyId}
+            </foreach>
+        </where>
+        
+    </select>
+    
+
     <!-- Grab Total Profiled Counts. Currently, this query filters out all samples associated with a Gene Panel WES before
     doing a join on gene_panel_to_gene_derived table. This is to prevent unnecessary stress on the db. For every sample
     associated with a gene panel WES we multiply that row by the number of genes in the gene table. This could be greater
diff --git a/src/test/java/org/cbioportal/service/util/StudyViewColumnarServiceUtilTest.java b/src/test/java/org/cbioportal/service/util/StudyViewColumnarServiceUtilTest.java
new file mode 100644
index 00000000000..9e4b0aabebf
--- /dev/null
+++ b/src/test/java/org/cbioportal/service/util/StudyViewColumnarServiceUtilTest.java
@@ -0,0 +1,131 @@
+package org.cbioportal.service.util;
+
+import org.cbioportal.model.ClinicalAttribute;
+import org.cbioportal.model.ClinicalDataCount;
+import org.cbioportal.model.ClinicalDataCountItem;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+
+import static org.junit.Assert.*;
+
+public class StudyViewColumnarServiceUtilTest {
+    
+    @Test
+    public void testMergeClinicalDataCounts() {
+       
+        // first two counts are for same value (value1) and so should be 
+        // merged
+        
+        ClinicalDataCount count1 = new ClinicalDataCount();
+        count1.setAttributeId("attr1");
+        count1.setValue("value1");
+        count1.setCount(1);
+
+        ClinicalDataCount count2 = new ClinicalDataCount();
+        count2.setAttributeId("attr1");
+        count2.setValue("value1");
+        count2.setCount(2);
+
+        ClinicalDataCount count3 = new ClinicalDataCount();
+        count3.setAttributeId("attr1");
+        count3.setValue("value3");
+        count3.setCount(6);
+
+        ClinicalDataCount count4 = new ClinicalDataCount();
+        count4.setAttributeId("attr1");
+        count4.setValue("value3");
+        count4.setCount(4);
+
+        ClinicalDataCount count5 = new ClinicalDataCount();
+        count5.setAttributeId("attr1");
+        count5.setValue("value2");
+        count5.setCount(4);
+
+        ClinicalDataCountItem item = new ClinicalDataCountItem();
+        item.setAttributeId("attr1");
+        item.setCounts(Arrays.asList(count1, count2, count3, count4, count5));
+
+        List<ClinicalDataCountItem> items = Collections.singletonList(item);
+
+        // Call the method under test
+        List<ClinicalDataCountItem> mergedItems = StudyViewColumnarServiceUtil.mergeClinicalDataCounts(items);
+
+        // it merged three count items to 2
+        Optional<ClinicalDataCount> mergedCount=mergedItems.get(0).getCounts().stream()
+            .filter(count->count.getValue().equals("value1")).findFirst();
+        Assert.assertEquals(3, mergedCount.get().getCount().intValue());
+        
+        Optional<ClinicalDataCount> mergedCount2=mergedItems.get(0).getCounts().stream()
+            .filter(count->count.getValue().equals("value2")).findFirst();
+        Assert.assertEquals(4, mergedCount2.get().getCount().intValue());
+        
+        Optional<ClinicalDataCount> mergedCount3=mergedItems.get(0).getCounts().stream()
+            .filter(count->count.getValue().equals("value3")).findFirst();
+        Assert.assertEquals(10, mergedCount3.get().getCount().intValue());
+        
+    }
+
+
+    @Test
+    public void testAddClinicalDataCountsForMissingAttributes() {
+        ClinicalDataCountItem existingItem = new ClinicalDataCountItem();
+        existingItem.setAttributeId("attr1");
+        ClinicalDataCount existingCount = new ClinicalDataCount();
+        existingCount.setCount(5);
+        existingCount.setValue("value1");
+        existingCount.setAttributeId("attr1");
+        existingItem.setCounts(Collections.singletonList(existingCount));
+
+        List<ClinicalDataCountItem> counts = Collections.singletonList(existingItem);
+
+        // we're gonna create two attributes which will not be represented in the passed result set
+        // test whether addClinicalDataCountsForMissingAttributes restores them
+        
+        ClinicalAttribute missingAttributeSample = new ClinicalAttribute();
+        missingAttributeSample.setAttrId("attr2");
+        missingAttributeSample.setPatientAttribute(false);
+        
+        ClinicalAttribute missingAttributePatient = new ClinicalAttribute();
+        missingAttributePatient.setAttrId("attr3");
+        missingAttributePatient.setPatientAttribute(true);
+
+        List<ClinicalAttribute> attributes = Arrays.asList(missingAttributeSample, missingAttributePatient);
+
+        List<ClinicalDataCountItem> result = StudyViewColumnarServiceUtil.addClinicalDataCountsForMissingAttributes(
+            counts, attributes, 10, 20
+        );
+
+        assertEquals(3, result.size());
+
+        Optional<ClinicalDataCountItem> addedItemSample = result.stream()
+            .filter(item -> item.getAttributeId().equals("attr2"))
+            .findFirst();
+
+        assertTrue(addedItemSample.isPresent());
+        assertEquals(1, addedItemSample.get().getCounts().size());
+        assertEquals("NA", addedItemSample.get().getCounts().get(0).getValue());
+        assertEquals(10, addedItemSample.get().getCounts().get(0).getCount().intValue());
+
+        Optional<ClinicalDataCountItem> addedItemPatient = result.stream()
+            .filter(item -> item.getAttributeId().equals("attr3"))
+            .findFirst();
+
+        assertTrue(addedItemPatient.isPresent());
+        assertEquals(1, addedItemPatient.get().getCounts().size());
+        assertEquals("NA", addedItemPatient.get().getCounts().get(0).getValue());
+        assertEquals(20, addedItemPatient.get().getCounts().get(0).getCount().intValue());
+        
+
+    }
+    
+    
+    
+    
+    
+    
+}
\ No newline at end of file