diff --git a/sdk/healthdataaiservices/azure-health-deidentification/CHANGELOG.md b/sdk/healthdataaiservices/azure-health-deidentification/CHANGELOG.md
index be2efaec75db..76b4efaeb6ba 100644
--- a/sdk/healthdataaiservices/azure-health-deidentification/CHANGELOG.md
+++ b/sdk/healthdataaiservices/azure-health-deidentification/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Release History
 
+## 1.0.0b3 (Unreleased)
+
+### Bugs Fixed
+
+Fixed tox pyright errors present in the build (Argument of type "Unknown" and Cannot access attribute)
+
 ## 1.0.0b2 (Unreleased)
 
 ### Features Added
diff --git a/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_model_base.py b/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_model_base.py
index 43fd8c7e9b1b..1c8c67e86672 100644
--- a/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_model_base.py
+++ b/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_model_base.py
@@ -323,15 +323,27 @@ def _get_type_alias_type(module_name: str, alias_name: str):
     return types[alias_name]
 
 
-def _get_model(module_name: str, model_name: str):
+def _get_model(module_name: str, model_name: typing.Union[str, typing.ForwardRef]) -> typing.Any:
     models = {k: v for k, v in sys.modules[module_name].__dict__.items() if isinstance(v, type)}
     module_end = module_name.rsplit(".", 1)[0]
     models.update({k: v for k, v in sys.modules[module_end].__dict__.items() if isinstance(v, type)})
-    if isinstance(model_name, str):
-        model_name = model_name.split(".")[-1]
-    if model_name not in models:
-        return model_name
-    return models[model_name]
+
+    # Get the actual name string from the ForwardRef if that's what we received
+    if isinstance(model_name, typing.ForwardRef):
+        name_str = typing.cast(str, getattr(model_name, "__forward_arg__", ""))
+    else:
+        name_str = typing.cast(str, model_name) if model_name else ""
+
+    if isinstance(name_str, str):
+        name_str = name_str.split(".")[-1]
+
+    # Look up the model class by name
+    if not isinstance(name_str, str):
+        raise ValueError("Model name must be a string or ForwardRef")
+
+    if name_str not in models:
+        return name_str
+    return models[name_str]
 
 
 _UNSET = object()
@@ -432,7 +444,7 @@ def _serialize(o, format: typing.Optional[str] = None):  # pylint: disable=too-m
     if isinstance(o, dict):
         return {k: _serialize(v, format) for k, v in o.items()}
     if isinstance(o, set):
-        return {_serialize(x, format) for x in o}
+        return list(_serialize(x, format) for x in o)  # Convert to list to avoid hashability issues
     if isinstance(o, tuple):
         return tuple(_serialize(x, format) for x in o)
     if isinstance(o, (bytes, bytearray)):
diff --git a/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_serialization.py b/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_serialization.py
index 8139854b97bb..59b2b2dc322b 100644
--- a/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_serialization.py
+++ b/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_serialization.py
@@ -1585,10 +1585,20 @@ def _instantiate_model(self, response, attrs, additional_properties=None):
         if callable(response):
             subtype = getattr(response, "_subtype_map", {})
             try:
-                readonly = [k for k, v in response._validation.items() if v.get("readonly")]
-                const = [k for k, v in response._validation.items() if v.get("constant")]
+                if isinstance(response, type):
+                    readonly = [k for k, v in response._validation.items() if v.get("readonly")]
+                else:
+                    readonly = []
+                if isinstance(response, type):
+                    const = [k for k, v in response._validation.items() if v.get("constant")]
+                else:
+                    const = []
                 kwargs = {k: v for k, v in attrs.items() if k not in subtype and k not in readonly + const}
-                response_obj = response(**kwargs)
+                if isinstance(response, type) and issubclass(response, Model):
+                    response_obj = response(**kwargs)
+                else:
+                    raise TypeError("Response is not a subclass of Model")
+
                 for attr in readonly:
                     setattr(response_obj, attr, attrs.get(attr))
                 if additional_properties:
diff --git a/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_version.py b/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_version.py
index bbcd28b4aa67..c43fdbc2e239 100644
--- a/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_version.py
+++ b/sdk/healthdataaiservices/azure-health-deidentification/azure/health/deidentification/_version.py
@@ -6,4 +6,4 @@
 # Changes may cause incorrect behavior and will be lost if the code is regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "1.0.0b2"
+VERSION = "1.0.0b3"