diff --git a/src/main/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidder.java b/src/main/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidder.java
index f2228778feb..afe429b1762 100644
--- a/src/main/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidder.java
+++ b/src/main/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidder.java
@@ -185,13 +185,61 @@ private ExtImpRtbhouse parseImpExt(Imp imp) {
     }
 
     private static Imp modifyImp(Imp imp, Price bidFloorPrice) {
+        final String existingTagid = imp.getTagid();
+        final String tagid = StringUtils.isNotBlank(existingTagid) ? existingTagid : extractTagid(imp);
         return imp.toBuilder()
+                .tagid(tagid)
                 .bidfloorcur(ObjectUtil.getIfNotNull(bidFloorPrice, Price::getCurrency))
                 .bidfloor(ObjectUtil.getIfNotNull(bidFloorPrice, Price::getValue))
                 .pmp(null)
                 .build();
     }
 
+    private static String extractTagid(Imp imp) {
+        final ObjectNode ext = imp.getExt();
+        if (ext != null) {
+            // 1. imp.ext.gpid
+            final JsonNode gpid = ext.get("gpid");
+            if (gpid != null && gpid.isTextual()) {
+                final String gpidValue = gpid.asText();
+                if (StringUtils.isNotBlank(gpidValue)) {
+                    return gpidValue;
+                }
+            }
+            // 2. imp.ext.data.adserver.adslot
+            final JsonNode data = ext.get("data");
+            if (data != null && data.isObject()) {
+                final JsonNode adserver = data.get("adserver");
+                if (adserver != null && adserver.isObject()) {
+                    final JsonNode adslot = adserver.get("adslot");
+                    if (adslot != null && adslot.isTextual()) {
+                        final String adslotValue = adslot.asText();
+                        if (StringUtils.isNotBlank(adslotValue)) {
+                            return adslotValue;
+                        }
+                    }
+                }
+            }
+            // 3. imp.ext.data.pbadslot
+            if (data != null && data.isObject()) {
+                final JsonNode pbadslot = data.get("pbadslot");
+                if (pbadslot != null && pbadslot.isTextual()) {
+                    final String pbadslotValue = pbadslot.asText();
+                    if (StringUtils.isNotBlank(pbadslotValue)) {
+                        return pbadslotValue;
+                    }
+                }
+            }
+        }
+        // 4. imp.id
+        final String impId = imp.getId();
+        if (StringUtils.isNotBlank(impId)) {
+            return impId;
+        }
+        // 5. empty (not set)
+        return null;
+    }
+
     private Price resolveBidFloor(Imp imp, ExtImpRtbhouse impExt, BidRequest bidRequest) {
         final List<String> brCur = bidRequest.getCur();
         final Price initialBidFloorPrice = Price.of(imp.getBidfloorcur(), imp.getBidfloor());
diff --git a/src/test/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidderTest.java b/src/test/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidderTest.java
index fe10dad45e3..b0f5b7a247c 100644
--- a/src/test/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/rtbhouse/RtbhouseBidderTest.java
@@ -518,6 +518,147 @@ public void makeHttpRequestsShouldAlwaysRemovePmpField() {
                 .containsOnlyNulls();
     }
 
+    @Test
+    public void makeHttpRequestsShouldSetTagidFromGpid() {
+        // given
+        final BidRequest bidRequest = BidRequest.builder()
+                .imp(singletonList(Imp.builder()
+                        .id("imp123")
+                        .ext(givenRtbhouseExt(node -> node.put("gpid", "gpid_value")))
+                        .build()))
+                .id("request_id")
+                .build();
+
+        // when
+        final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
+
+        // then
+        assertThat(result.getErrors()).isEmpty();
+        assertThat(result.getValue()).hasSize(1)
+                .extracting(HttpRequest::getPayload)
+                .flatExtracting(BidRequest::getImp)
+                .extracting(Imp::getTagid)
+                .containsExactly("gpid_value");
+    }
+
+    @Test
+    public void makeHttpRequestsShouldSetTagidFromAdserverAdslot() {
+        // given
+        final BidRequest bidRequest = BidRequest.builder()
+                .imp(singletonList(Imp.builder()
+                        .id("imp123")
+                        .ext(givenRtbhouseExt(node -> node.set("data", mapper.createObjectNode()
+                                .set("adserver", mapper.createObjectNode().put("adslot", "adslot_value")))))
+                        .build()))
+                .id("request_id")
+                .build();
+
+        // when
+        final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
+
+        // then
+        assertThat(result.getErrors()).isEmpty();
+        assertThat(result.getValue()).hasSize(1)
+                .extracting(HttpRequest::getPayload)
+                .flatExtracting(BidRequest::getImp)
+                .extracting(Imp::getTagid)
+                .containsExactly("adslot_value");
+    }
+
+    @Test
+    public void makeHttpRequestsShouldSetTagidFromPbadslot() {
+        // given
+        final BidRequest bidRequest = BidRequest.builder()
+                .imp(singletonList(Imp.builder()
+                        .id("imp123")
+                        .ext(givenRtbhouseExt(node -> node.set("data", mapper.createObjectNode()
+                                .put("pbadslot", "pbadslot_value"))))
+                        .build()))
+                .id("request_id")
+                .build();
+
+        // when
+        final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
+
+        // then
+        assertThat(result.getErrors()).isEmpty();
+        assertThat(result.getValue()).hasSize(1)
+                .extracting(HttpRequest::getPayload)
+                .flatExtracting(BidRequest::getImp)
+                .extracting(Imp::getTagid)
+                .containsExactly("pbadslot_value");
+    }
+
+    @Test
+    public void makeHttpRequestsShouldSetTagidFromImpIdWhenNoOtherFields() {
+        // given
+        final BidRequest bidRequest = givenBidRequest(
+                bidReq -> bidReq.id("request_id"),
+                imp -> imp.id("imp123"),
+                identity());
+
+        // when
+        final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
+
+        // then
+        assertThat(result.getErrors()).isEmpty();
+        assertThat(result.getValue()).hasSize(1)
+                .extracting(HttpRequest::getPayload)
+                .flatExtracting(BidRequest::getImp)
+                .extracting(Imp::getTagid)
+                .containsExactly("imp123");
+    }
+
+    @Test
+    public void makeHttpRequestsShouldSetTagidToNullWhenNoFieldsAvailable() {
+        // given
+        final BidRequest bidRequest = BidRequest.builder()
+                .imp(singletonList(Imp.builder()
+                        .id(null)
+                        .ext(mapper.valueToTree(ExtPrebid.of(null, ExtImpRtbhouse.builder()
+                                .publisherId("publisherId")
+                                .region("region")
+                                .build())))
+                        .build()))
+                .id("request_id")
+                .build();
+
+        // when
+        final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
+
+        // then
+        assertThat(result.getErrors()).isEmpty();
+        assertThat(result.getValue()).hasSize(1)
+                .extracting(HttpRequest::getPayload)
+                .flatExtracting(BidRequest::getImp)
+                .extracting(Imp::getTagid)
+                .containsOnlyNulls();
+    }
+
+    @Test
+    public void makeHttpRequestsShouldPreserveExistingTagid() {
+        // given
+        final BidRequest bidRequest = BidRequest.builder()
+                .imp(singletonList(Imp.builder()
+                        .id("imp123")
+                        .tagid("existing_tagid")
+                        .ext(givenRtbhouseExt(node -> node.put("gpid", "gpid_value")))
+                        .build()))
+                .id("request_id")
+                .build();
+
+        // when
+        final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
+
+        // then
+        assertThat(result.getErrors()).isEmpty();
+        assertThat(result.getValue()).hasSize(1)
+                .extracting(HttpRequest::getPayload)
+                .flatExtracting(BidRequest::getImp)
+                .extracting(Imp::getTagid)
+                .containsExactly("existing_tagid");
+    }
+
     private static BidResponse givenBidResponse(Function<Bid.BidBuilder, Bid.BidBuilder> bidCustomizer) {
         return BidResponse.builder()
                 .cur("USD")
@@ -562,4 +703,12 @@ private static Imp givenImp(Function<Imp.ImpBuilder, Imp.ImpBuilder> impCustomiz
                                         .build()))))
                 .build();
     }
+
+    private static ObjectNode givenRtbhouseExt(Function<ObjectNode, ObjectNode> extCustomizer) {
+        final ObjectNode extNode = (ObjectNode) mapper.valueToTree(ExtPrebid.of(null, ExtImpRtbhouse.builder()
+                .publisherId("publisherId")
+                .region("region")
+                .build()));
+        return extCustomizer.apply(extNode);
+    }
 }
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/rtbhouse/test-rtbhouse-bid-request.json b/src/test/resources/org/prebid/server/it/openrtb2/rtbhouse/test-rtbhouse-bid-request.json
index e63afde3937..28d0438942f 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/rtbhouse/test-rtbhouse-bid-request.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/rtbhouse/test-rtbhouse-bid-request.json
@@ -13,7 +13,8 @@
         "bidder": {
           "publisherId": "publisherId"
         }
-      }
+      },
+      "tagid": "imp_id"
     }
   ],
   "source": {