diff --git a/src/sentry/snuba/metrics/extraction.py b/src/sentry/snuba/metrics/extraction.py
index 9dda9d15f698f0..f39eba508babed 100644
--- a/src/sentry/snuba/metrics/extraction.py
+++ b/src/sentry/snuba/metrics/extraction.py
@@ -116,7 +116,6 @@
     "max": "max",
     "p50": "p50",
     "p75": "p75",
-    "p90": "p90",
     "p95": "p95",
     "p99": "p99",
     "p100": "p100"
@@ -142,7 +141,6 @@
     "max": "d",
     "p50": "d",
     "p75": "d",
-    "p90": "d",
     "p95": "d",
     "p99": "d",
     "p100": "d",
@@ -363,8 +361,6 @@ def _get_percentile_op(args: Sequence[str]) -> Optional[MetricOperationType]:
         return "p50"
     if percentile == "0.75":
         return "p75"
-    if percentile in ["0.9", "0.90"]:
-        return "p90"
     if percentile == "0.95":
         return "p95"
     if percentile == "0.99":
diff --git a/tests/sentry/snuba/test_extraction.py b/tests/sentry/snuba/test_extraction.py
index 1707338c36550a..acfc54d0f452d5 100644
--- a/tests/sentry/snuba/test_extraction.py
+++ b/tests/sentry/snuba/test_extraction.py
@@ -73,8 +73,6 @@ class TestCreatesOndemandMetricSpec:
             # we dont support custom percentiles that can be mapped to one of standard percentiles
             ("percentile(transaction.duration, 0.5)", "transaction.duration>0"),
             ("percentile(transaction.duration, 0.50)", "transaction.duration>0"),
-            ("percentile(transaction.duration, 0.9)", "transaction.duration>0"),
-            ("percentile(transaction.duration, 0.90)", "transaction.duration>0"),
             ("percentile(transaction.duration, 0.95)", "transaction.duration>0"),
             ("percentile(transaction.duration, 0.99)", "transaction.duration>0"),
             ("percentile(transaction.duration, 1)", "transaction.duration>0"),