diff --git a/litellm/llms/bedrock/common_utils.py b/litellm/llms/bedrock/common_utils.py
index fff66f33610..a7eb15556cf 100644
--- a/litellm/llms/bedrock/common_utils.py
+++ b/litellm/llms/bedrock/common_utils.py
@@ -1334,14 +1334,16 @@ def bedrock_serves_service_tier(model: str, service_tier: str) -> bool:
     row for exactly the models that serve a tier, so a non-null price is the capability signal (the
     proxy normalizes every row to the full ModelInfo shape, so key presence alone means nothing). ``default``
     and ``auto`` are always served, and a model absent from the price map has no signal and is
-    forwarded as before.
+    forwarded as before. Regional CRIS rows (``eu.``, ``apac.``, ``us-gov.``) often omit the tier
+    prices their base row carries, so the base row is consulted too.
     """
     from litellm.litellm_core_utils.llm_cost_calc.utils import get_service_tier_cost_key
 
     cost_key: Final = get_service_tier_cost_key("input_cost_per_token", service_tier)
     if cost_key == "input_cost_per_token":
         return True
-    entries: Final = tuple(entry for entry in _bedrock_price_map_entries(model) if entry is not None)
+    candidates: Final = (*_bedrock_price_map_entries(model), _model_cost_entry(get_bedrock_base_model(model)))
+    entries: Final = tuple(entry for entry in candidates if entry is not None)
     if not entries:
         return True
     return any(entry.get(cost_key) is not None for entry in entries)
diff --git a/tests/unit/llms/bedrock/test_bedrock_common_utils.py b/tests/unit/llms/bedrock/test_bedrock_common_utils.py
index 496af9fb2d4..ae698923112 100644
--- a/tests/unit/llms/bedrock/test_bedrock_common_utils.py
+++ b/tests/unit/llms/bedrock/test_bedrock_common_utils.py
@@ -2286,6 +2286,7 @@ _STANDARD_ONLY_ROW: Final = {
         ("tiered.model-v1:0", "priority", True),
         ("tiered.model-v1:0", "flex", True),
         ("bedrock/us-west-2/tiered.model-v1:0", "flex", True),
+        ("eu.tiered.model-v1:0", "priority", True),
         ("standard.model-v1:0", "priority", False),
         ("standard.model-v1:0", "flex", False),
         ("standard.model-v1:0", "default", True),
@@ -2298,8 +2299,10 @@ def test_bedrock_serves_service_tier_follows_price_map_tier_rows(
 ) -> None:
     """A Bedrock model serves a tier exactly when its price-map row carries a non-null price for that tier.
     The proxy expands every row to the full ModelInfo shape, so a null price (standard-only row) is no signal,
-    `default` and `auto` are always served, and an unknown model keeps being forwarded."""
+    `default` and `auto` are always served, and an unknown model keeps being forwarded. A regional CRIS row
+    that omits the tier prices does not hide the base row that carries them."""
     monkeypatch.setitem(litellm.model_cost, "tiered.model-v1:0", dict(_TIER_PRICED_ROW))
+    monkeypatch.setitem(litellm.model_cost, "eu.tiered.model-v1:0", dict(_STANDARD_ONLY_ROW))
     monkeypatch.setitem(litellm.model_cost, "standard.model-v1:0", dict(_STANDARD_ONLY_ROW))
 
     assert bedrock_serves_service_tier(model, service_tier) is expected