diff --git a/application/CohortManager/src/Functions/CohortDistributionServices/TransformDataService/TransformDataService.cs b/application/CohortManager/src/Functions/CohortDistributionServices/TransformDataService/TransformDataService.cs
index db5d0039c..4f6faa1da 100644
--- a/application/CohortManager/src/Functions/CohortDistributionServices/TransformDataService/TransformDataService.cs
+++ b/application/CohortManager/src/Functions/CohortDistributionServices/TransformDataService/TransformDataService.cs
@@ -29,7 +29,6 @@ public class TransformDataService
     private readonly ITransformReasonForRemoval _transformReasonForRemoval;
     private readonly ITransformDataLookupFacade _dataLookup;
     private readonly IReasonForRemovalLookup _reasonForRemovalLookup;
-
     public TransformDataService(
         ICreateResponse createResponse,
         IExceptionHandler exceptionHandler,
@@ -92,7 +91,6 @@ public async Task<HttpResponseData> RunAsync([HttpTrigger(AuthorizationLevel.Ano
             if (participant.NhsNumber == null)
             {
                 return _createResponse.CreateHttpResponse(HttpStatusCode.Accepted, req, "");
-
             }
 
             var response = JsonSerializer.Serialize(participant);
diff --git a/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json b/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json
index 7cd757bad..a45b02076 100644
--- a/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json
+++ b/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/Breast_Screening_lookupRules.json
@@ -102,5 +102,28 @@
         }
       }
     ]
+  },
+  {
+    "WorkflowName":"ManualAdd",
+    "GlobalParams": [
+      {
+        "Name": "ValidPrimaryCareProvider",
+        "Expression": "string.IsNullOrEmpty(newParticipant.PrimaryCareProvider) || dbLookup.CheckIfPrimaryCareProviderExists(newParticipant.PrimaryCareProvider)"
+      }
+    ],
+    "Rules":[
+      {
+        "RuleName": "3601.ValidatePrimaryCareProvider.NBO.NonFatal",
+        "Expression": "ValidPrimaryCareProvider",
+        "Actions": {
+          "OnFailure": {
+            "Name": "OutputExpression",
+            "Context": {
+              "Expression": "\"Invalid primary care provider GP practice code\""
+            }
+          }
+        }
+      }
+    ]
   }
 ]
diff --git a/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/LookupValidation.cs b/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/LookupValidation.cs
index 887e29776..9f1060e8f 100644
--- a/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/LookupValidation.cs
+++ b/application/CohortManager/src/Functions/ScreeningValidationService/LookupValidation/LookupValidation.cs
@@ -59,6 +59,8 @@ public async Task<HttpResponseData> RunAsync([HttpTrigger(AuthorizationLevel.Ano
         {
             newParticipant = requestBody.NewParticipant;
 
+            var isManualAdd = ValidationHelper.CheckManualAddFileName(requestBody.FileName);
+
             var ruleFileName = $"{newParticipant.ScreeningName}_lookupRules.json".Replace(" ", "_");
             _logger.LogInformation("ruleFileName {RuleFileName}", ruleFileName);
 
@@ -72,8 +74,6 @@ public async Task<HttpResponseData> RunAsync([HttpTrigger(AuthorizationLevel.Ano
             };
             var re = new RulesEngine.RulesEngine(rules, reSettings);
 
-
-
             var ruleParameters = new[] {
                 new RuleParameter("existingParticipant", requestBody.ExistingParticipant),
                 new RuleParameter("newParticipant", newParticipant),
@@ -86,13 +86,17 @@ public async Task<HttpResponseData> RunAsync([HttpTrigger(AuthorizationLevel.Ano
             {
                 resultList = await re.ExecuteAllRulesAsync("Common", ruleParameters);
             }
-
             if (re.GetAllRegisteredWorkflowNames().Contains(newParticipant.RecordType))
             {
                 _logger.LogInformation("Executing workflow {RecordType}", newParticipant.RecordType);
                 var ActionResults = await re.ExecuteAllRulesAsync(newParticipant.RecordType, ruleParameters);
                 resultList.AddRange(ActionResults);
             }
+            if (isManualAdd)
+            {
+                var ActionResults = await re.ExecuteAllRulesAsync("ManualAdd", ruleParameters);
+                resultList.AddRange(ActionResults);
+            }
 
             // Validation rules are logically reversed
             var validationErrors = resultList.Where(x => !x.IsSuccess).Select(x => new ValidationRuleResult(x));
diff --git a/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs b/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs
index 7cad6ec8e..455232727 100644
--- a/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs
+++ b/tests/UnitTests/ScreeningValidationServiceTests/LookupValidation/LookupValidationTests.cs
@@ -60,7 +60,7 @@ public void IntialiseTests()
             ReferralFlag = "false"
         };
 
-        _requestBody = new LookupValidationRequestBody(existingParticipant, newParticipant, "caas.csv");
+        _requestBody = new LookupValidationRequestBody(existingParticipant, newParticipant, "caas.parquet");
         _request.Setup(r => r.CreateResponse()).Returns(() =>
         {
             var response = new Mock<HttpResponseData>(_context.Object);
@@ -446,6 +446,56 @@ public async Task Run_ParticipantLocationRemainingOutsideOfCohort_ReturnNoConten
         // Assert
         Assert.AreEqual(HttpStatusCode.NoContent, response.StatusCode);
     }
+    [TestMethod]
+    public async Task Run_ManualAddValidPCP_ReturnsNoContent()
+    {
+        // arrange
+
+        _requestBody.FileName = "CS0848402";
+        _requestBody.NewParticipant.RecordType = Actions.New;
+        _requestBody.NewParticipant.PrimaryCareProvider = "ZZZAGA";
+        _requestBody.NewParticipant.AddressLine1 = "123 Test Street";
+        _requestBody.NewParticipant.Postcode = "TE57 1NG";
+        _requestBody.ExistingParticipant = null;
+
+        var json = JsonSerializer.Serialize(_requestBody);
+        SetUpRequestBody(json);
+
+        _lookupValidation.Setup(x => x.CheckIfPrimaryCareProviderExists("ZZZAGA")).Returns(true);
+
+
+        // Act
+        var response = await _sut.RunAsync(_request.Object);
+        string body = await AssertionHelper.ReadResponseBodyAsync(response);
+
+        // Assert
+        Assert.AreEqual(HttpStatusCode.NoContent, response.StatusCode);
+    }
+     [TestMethod]
+    public async Task Run_ManualAddInvalidPCP_ReturnsValidationException()
+    {
+        // arrange
+
+        _requestBody.FileName = "CS0848402";
+        _requestBody.NewParticipant.RecordType = Actions.New;
+        _requestBody.NewParticipant.PrimaryCareProvider = "ZZZAGA";
+        _requestBody.NewParticipant.AddressLine1 = "123 Test Street";
+        _requestBody.NewParticipant.Postcode = "TE57 1NG";
+        _requestBody.ExistingParticipant = null;
+
+        var json = JsonSerializer.Serialize(_requestBody);
+        SetUpRequestBody(json);
+
+        _lookupValidation.Setup(x => x.CheckIfPrimaryCareProviderExists("ZZZAGA")).Returns(false);
+
+
+        // Act
+        var response = await _sut.RunAsync(_request.Object);
+        string body = await AssertionHelper.ReadResponseBodyAsync(response);
+
+        // Assert
+        StringAssert.Contains(body, "3601.ValidatePrimaryCareProvider.NBO.NonFatal");
+    }
 
     private void SetUpRequestBody(string json)
     {