diff --git a/NPPESAPI.net/Core/NPPESContractResolver.cs b/NPPESAPI.net/Core/NPPESContractResolver.cs
index 093a8d5..a2bfa3b 100644
--- a/NPPESAPI.net/Core/NPPESContractResolver.cs
+++ b/NPPESAPI.net/Core/NPPESContractResolver.cs
@@ -80,12 +80,14 @@ private static void ChangePropertyName(Type type, JsonProperty property)
                     { nameof(NPPESBasic.EnumerationDate), "enumeration_date" },
                     { nameof(NPPESBasic.FirstName), "first_name" },
                     { nameof(NPPESBasic.Gender), "gender" },
+                    { nameof(NPPESBasic.Sex), "sex" },
                     { nameof(NPPESBasic.LastName), "last_name" },
                     { nameof(NPPESBasic.LastUpdated), "last_updated" },
                     { nameof(NPPESBasic.MiddleName), "middle_name" },
                     { nameof(NPPESBasic.NamePrefix), "name_prefix" },
                     { nameof(NPPESBasic.NameSuffix), "name_suffix" },
                     { nameof(NPPESBasic.OrganizationName), "organization_name" },
+                    { nameof(NPPESBasic.ParentOrganizationLegalBusinessName), "parent_organization_legal_business_name" },
                     { nameof(NPPESBasic.ReplacementNPI), "replacement_npi" }
                 }
             },
diff --git a/NPPESAPI.net/Models/NPPESBasic.cs b/NPPESAPI.net/Models/NPPESBasic.cs
index 5f2210a..e3d7129 100644
--- a/NPPESAPI.net/Models/NPPESBasic.cs
+++ b/NPPESAPI.net/Models/NPPESBasic.cs
@@ -22,6 +22,11 @@ public class NPPESBasic
         /// </summary>
         public string OrganizationName { get; set; }
 
+        /// <summary>
+        /// Parent Organization Legal Business Name
+        /// </summary>
+        public string ParentOrganizationLegalBusinessName { get; set; }
+
         /// <summary>
         /// The registered individual's first name.
         /// </summary>
@@ -56,7 +61,12 @@ public class NPPESBasic
         /// The registered Individual's gender.
         /// </summary>
         public string Gender { get; set; }
-
+        
+        /// <summary>
+        /// The registered Individual's sex.
+        /// </summary>
+        public string Sex { get; set; }
+        
         /// <summary>
         /// The time the record was created.
         /// </summary>