diff --git a/pkg/distributor/distributor.go b/pkg/distributor/distributor.go
index 9e31784b12f..0d1a067eb2a 100644
--- a/pkg/distributor/distributor.go
+++ b/pkg/distributor/distributor.go
@@ -327,7 +327,6 @@ func New(cfg Config, clientConfig ingester_client.Config, limits *validation.Ove
 			Help:      "Number of labels per sample.",
 			Buckets:   []float64{5, 10, 15, 20, 25},
 		}),
-		// TODO switch to native histogram eventually and add "type" label
 		sampleDelayHistogram: promauto.With(reg).NewHistogram(prometheus.HistogramOpts{
 			Namespace: "cortex",
 			Name:      "distributor_sample_delay_seconds",
diff --git a/pkg/ingester/ingester.go b/pkg/ingester/ingester.go
index 3b7b4110d6c..8be11b66077 100644
--- a/pkg/ingester/ingester.go
+++ b/pkg/ingester/ingester.go
@@ -1617,13 +1617,9 @@ func (i *Ingester) queryStreamSamples(ctx context.Context, db *userTSDB, from, t
 				t, v := it.At()
 				ts.Samples = append(ts.Samples, mimirpb.Sample{Value: v, TimestampMs: t})
 			case chunkenc.ValHistogram:
-				// TODO when read path for native histograms is ready, return Histogram samples
-				// t, v := it.AtHistogram()
-				// ts.Histograms = append(ts.Histograms, mimirpb.FromHistogramToHistogramProto(t, v))
+				// ignore
 			case chunkenc.ValFloatHistogram:
-				// TODO when read path for native histograms is ready, return Histogram samples
-				// t, v := it.AtFloatHistogram()
-				// ts.Histograms = append(ts.Histograms, mimirpb.FromFloatHistogramToHistogramProto(t, v))
+				// ignore
 			default:
 				return 0, 0, 0, fmt.Errorf("unsupported value type: %v", valType)
 			}
@@ -1727,11 +1723,9 @@ func (i *Ingester) queryStreamChunks(ctx context.Context, db *userTSDB, from, th
 			case chunkenc.EncXOR:
 				ch.Encoding = int32(chunk.PrometheusXorChunk)
 			case chunkenc.EncHistogram:
-				// ch.Encoding = int32(chunk.PrometheusHistogramChunk)
-				continue // TODO when read path for native histograms is ready, return Histogram chunks
+				continue // ignore
 			case chunkenc.EncFloatHistogram:
-				// ch.Encoding = int32(chunk.PrometheusFloatHistogramChunk)
-				continue // TODO when read path for native histograms is ready, return FloatHistogram chunks
+				continue // ignore
 			default:
 				return 0, 0, errors.Errorf("unknown chunk encoding from TSDB chunk querier: %v", meta.Chunk.Encoding())
 			}
diff --git a/pkg/ingester/ingester_test.go b/pkg/ingester/ingester_test.go
index c4e0ab66e90..463612f8dca 100644
--- a/pkg/ingester/ingester_test.go
+++ b/pkg/ingester/ingester_test.go
@@ -7441,11 +7441,6 @@ func testIngesterCanEnableIngestAndQueryNativeHistograms(t *testing.T, sampleHis
 			Timestamp: 0,
 			Value:     1,
 		}},
-		// TODO when read path for native histograms is ready, uncomment this
-		// Histograms: []model.SampleHistogramPair{{
-		// 	Timestamp: 2,
-		// 	Histogram: expectHistogram,
-		// }},
 	}}
 
 	testResult(expectedMatrix, "Result should contain the histogram when accepting histograms")
diff --git a/pkg/ingester/metrics.go b/pkg/ingester/metrics.go
index 2355e62f552..8c30d6f534b 100644
--- a/pkg/ingester/metrics.go
+++ b/pkg/ingester/metrics.go
@@ -141,7 +141,6 @@ func newIngesterMetrics(
 			Name: "cortex_ingester_queries_total",
 			Help: "The total number of queries the ingester has handled.",
 		}),
-		// TODO use native histograms and add "type" label
 		queriedSamples: promauto.With(r).NewHistogram(prometheus.HistogramOpts{
 			Name: "cortex_ingester_queried_samples",
 			Help: "The total number of samples returned from queries.",
@@ -164,7 +163,6 @@ func newIngesterMetrics(
 			Name: "cortex_ingester_queries_ephemeral_total",
 			Help: "The total number of queries the ingester has handled for ephemeral storage.",
 		}),
-		// TODO use native histograms and add "type" label
 		ephemeralQueriedSamples: promauto.With(r).NewHistogram(prometheus.HistogramOpts{
 			Name:    "cortex_ingester_queried_ephemeral_samples",
 			Help:    "The total number of samples from ephemeral storage returned per query.",