diff --git a/src/eligibility_signposting_api/common/api_error_response.py b/src/eligibility_signposting_api/common/api_error_response.py
index afdbfe962..63246dc55 100644
--- a/src/eligibility_signposting_api/common/api_error_response.py
+++ b/src/eligibility_signposting_api/common/api_error_response.py
@@ -22,13 +22,11 @@ class FHIRIssueCode(str, Enum):
     FORBIDDEN = "forbidden"
     PROCESSING = "processing"
     VALUE = "value"
-    INVALID = "invalid"
 
 
 class FHIRSpineErrorCode(str, Enum):
     ACCESS_DENIED = "ACCESS_DENIED"
     INVALID_PARAMETER = "INVALID_PARAMETER"
-    BAD_REQUEST = "BAD_REQUEST"
     INTERNAL_SERVER_ERROR = "INTERNAL_SERVER_ERROR"
     REFERENCE_NOT_FOUND = "REFERENCE_NOT_FOUND"
 
@@ -140,12 +138,3 @@ def log_and_generate_response(
     fhir_error_code=FHIRSpineErrorCode.ACCESS_DENIED,
     fhir_display_message="Access has been denied to process this request.",
 )
-
-
-NHS_NUMBER_MISSING_ERROR = APIErrorResponse(
-    status_code=HTTPStatus.BAD_REQUEST,
-    fhir_issue_code=FHIRIssueCode.INVALID,
-    fhir_issue_severity=FHIRIssueSeverity.ERROR,
-    fhir_error_code=FHIRSpineErrorCode.BAD_REQUEST,
-    fhir_display_message="Bad Request",
-)
diff --git a/src/eligibility_signposting_api/common/request_validator.py b/src/eligibility_signposting_api/common/request_validator.py
index 9375fd729..7e4cc97a3 100644
--- a/src/eligibility_signposting_api/common/request_validator.py
+++ b/src/eligibility_signposting_api/common/request_validator.py
@@ -11,7 +11,6 @@
     INVALID_CONDITION_FORMAT_ERROR,
     INVALID_INCLUDE_ACTIONS_ERROR,
     NHS_NUMBER_MISMATCH_ERROR,
-    NHS_NUMBER_MISSING_ERROR,
 )
 from eligibility_signposting_api.config.contants import NHS_NUMBER_HEADER
 
@@ -60,12 +59,6 @@ def wrapper(event: LambdaEvent, context: LambdaContext) -> dict[str, Any] | None
             path_nhs_no = event.get("pathParameters", {}).get("id")
             header_nhs_no = event.get("headers", {}).get(NHS_NUMBER_HEADER)
 
-            if not path_nhs_no:
-                message = "Missing required NHS Number from path parameters"
-                return NHS_NUMBER_MISSING_ERROR.log_and_generate_response(
-                    log_message=message, diagnostics=message, location_param="id"
-                )
-
             if not validate_nhs_number(path_nhs_no, header_nhs_no):
                 message = "You are not authorised to request information for the supplied NHS Number"
                 return NHS_NUMBER_MISMATCH_ERROR.log_and_generate_response(log_message=message, diagnostics=message)
diff --git a/tests/unit/common/test_request_validator.py b/tests/unit/common/test_request_validator.py
index 0ec6726d5..d00c9768e 100644
--- a/tests/unit/common/test_request_validator.py
+++ b/tests/unit/common/test_request_validator.py
@@ -83,36 +83,6 @@ def test_validate_request_params_nhs_mismatch(self, caplog):
         assert issue["details"]["coding"][0]["display"] == "Access has been denied to process this request."
         assert issue["diagnostics"] == "You are not authorised to request information for the supplied NHS Number"
 
-    def test_validate_request_params_nhs_missing_in_path(self, caplog):
-        mock_handler = MagicMock()
-        mock_context = {}
-        event = {
-            "headers": {"nhs-login-nhs-number": "1234567890"},
-        }
-
-        decorator = request_validator.validate_request_params()
-        wrapped_handler = decorator(mock_handler)
-
-        with caplog.at_level(logging.ERROR):
-            response = wrapped_handler(event, mock_context)
-
-        mock_handler.assert_not_called()
-
-        assert response is not None
-        assert response["statusCode"] == HTTPStatus.BAD_REQUEST
-        response_body = json.loads(response["body"])
-        issue = response_body["issue"][0]
-        assert issue["code"] == "invalid"
-        assert issue["severity"] == "error"
-        assert issue["details"]["coding"][0]["code"] == "BAD_REQUEST"
-        assert issue["details"]["coding"][0]["display"] == "Bad Request"
-        assert issue["diagnostics"] == "Missing required NHS Number from path parameters"
-        assert issue["location"][0] == "parameters/id"
-        assert any(
-            (record.levelname == "ERROR" and "Missing required NHS Number from path parameters" in record.message)
-            for record in caplog.records
-        )
-
 
 class TestValidateQueryParameters:
     @pytest.mark.parametrize(