diff --git a/litellm/proxy/health_endpoints/_health_endpoints.py b/litellm/proxy/health_endpoints/_health_endpoints.py
index 72d23b6bb2f..6aa456a8c46 100644
--- a/litellm/proxy/health_endpoints/_health_endpoints.py
+++ b/litellm/proxy/health_endpoints/_health_endpoints.py
@@ -708,22 +708,28 @@ def _build_model_param_to_info_mapping(model_list: list) -> dict:
     return model_param_to_info
 
 
-def _get_model_infos_for_endpoint(model_param_to_info: dict, endpoint: dict) -> list:
+def _get_model_infos_for_endpoint(
+    model_param_to_info: Mapping[str, list[Mapping[str, Any]]],
+    endpoint: Mapping[str, Any],
+) -> list[Mapping[str, Any]]:
     """
     Return the model infos a health check endpoint result belongs to.
 
-    `model_param_to_info` is keyed by `litellm_params.model`, which is not unique:
-    several deployments (different api_base, or model-group aliases) can share it.
-    Each endpoint result carries the `model_id` of the deployment it was produced
-    for, so prefer an exact match on that and fall back to the model-param match
-    only when no id is available.
+    ``model_param_to_info`` is keyed by ``litellm_params.model``, which is not
+    unique: several deployments (different ``api_base``, or model-group aliases)
+    can share it. Each endpoint result carries the ``model_id`` of the
+    deployment it was produced for, so prefer an exact match on that. When an
+    id is present but matches nothing locally, the result is for a deployment
+    this proxy does not know about, so return an empty list instead of falling
+    back to the broad model-name match (which would reintroduce the original
+    cross-attribution bug). Fall back to the model-param mapping only when no
+    id is available at all.
     """
     model_infos = model_param_to_info.get(endpoint.get("model"), [])
     endpoint_model_id = endpoint.get("model_id")
     if endpoint_model_id:
         matching = [info for info in model_infos if info.get("model_id") == endpoint_model_id]
-        if matching:
-            return matching
+        return matching
     return model_infos