diff --git a/modules/check_in/app/serializers/check_in/vaos/vaos_appointment_data_serializer.rb b/modules/check_in/app/serializers/check_in/vaos/vaos_appointment_data_serializer.rb
new file mode 100644
index 00000000000..9a524002c2a
--- /dev/null
+++ b/modules/check_in/app/serializers/check_in/vaos/vaos_appointment_data_serializer.rb
@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+module CheckIn
+  module VAOS
+    class VAOSAppointmentDataSerializer
+      include JSONAPI::Serializer
+
+      keys_to_serialize = %i[id identifier kind status serviceType locationId clinic start end extension]
+
+      set_id(&:id)
+
+      attribute :appointments do |object|
+        object.data.map do |data|
+          data.select { |key| keys_to_serialize.include?(key) }
+        end
+      end
+    end
+  end
+end
diff --git a/modules/check_in/spec/serializers/vaos/vaos_appointment_data_serializer_spec.rb b/modules/check_in/spec/serializers/vaos/vaos_appointment_data_serializer_spec.rb
new file mode 100644
index 00000000000..c96be214efb
--- /dev/null
+++ b/modules/check_in/spec/serializers/vaos/vaos_appointment_data_serializer_spec.rb
@@ -0,0 +1,249 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe CheckIn::VAOS::VAOSAppointmentDataSerializer do
+  subject { described_class }
+
+  let(:vaos_appointment_data) do
+    {
+      data: [
+        {
+          id: '180765',
+          identifier: [
+            {
+              system: 'Appointment/',
+              value: '413938333130383735'
+            },
+            {
+              system: 'http://www.va.gov/Terminology/VistADefinedTerms/409_84',
+              value: '983:10875'
+            }
+          ],
+          kind: 'clinic',
+          status: 'booked',
+          serviceType: 'amputation',
+          patientIcn: '1013125218V696863',
+          locationId: '983GC',
+          clinic: '1081',
+          start: '2023-11-06T16:00:00Z',
+          end: '2023-11-06T16:30:00Z',
+          minutesDuration: 30,
+          created: '2023-08-02T00:00:00Z',
+          cancellable: true,
+          extension: {
+            ccLocation: {
+              address: {}
+            },
+            vistaStatus: [
+              'NO ACTION TAKEN'
+            ],
+            preCheckinAllowed: true,
+            eCheckinAllowed: true
+          }
+        },
+        {
+          id: '180766',
+          identifier: [
+            {
+              system: 'Appointment/',
+              value: '413938333130383736'
+            },
+            {
+              system: 'http://www.va.gov/Terminology/VistADefinedTerms/409_84',
+              value: '983:10876'
+            }
+          ],
+          kind: 'clinic',
+          status: 'booked',
+          serviceType: 'amputation',
+          patientIcn: '1013125218V696863',
+          locationId: '983GC',
+          clinic: '1081',
+          start: '2023-11-13T16:00:00Z',
+          end: '2023-11-13T16:30:00Z',
+          minutesDuration: 30,
+          created: '2023-08-02T00:00:00Z',
+          cancellable: true,
+          extension: {
+            ccLocation: {
+              address: {}
+            },
+            vistaStatus: [
+              'FUTURE'
+            ],
+            preCheckinAllowed: true,
+            eCheckinAllowed: true
+          }
+        }
+      ]
+    }
+  end
+
+  context 'For valid vaos appointment data' do
+    let(:appointment1) do
+      {
+        id: '180765',
+        identifier: [
+          {
+            system: 'Appointment/',
+            value: '413938333130383735'
+          },
+          {
+            system: 'http://www.va.gov/Terminology/VistADefinedTerms/409_84',
+            value: '983:10875'
+          }
+        ],
+        kind: 'clinic',
+        status: 'booked',
+        serviceType: 'amputation',
+        locationId: '983GC',
+        clinic: '1081',
+        start: '2023-11-06T16:00:00Z',
+        end: '2023-11-06T16:30:00Z',
+        extension: {
+          ccLocation: {
+            address: {}
+          },
+          vistaStatus: [
+            'NO ACTION TAKEN'
+          ],
+          preCheckinAllowed: true,
+          eCheckinAllowed: true
+        }
+      }
+    end
+    let(:appointment2) do
+      {
+        id: '180766',
+        identifier: [
+          {
+            system: 'Appointment/',
+            value: '413938333130383736'
+          },
+          {
+            system: 'http://www.va.gov/Terminology/VistADefinedTerms/409_84',
+            value: '983:10876'
+          }
+        ],
+        kind: 'clinic',
+        status: 'booked',
+        serviceType: 'amputation',
+        locationId: '983GC',
+        clinic: '1081',
+        start: '2023-11-13T16:00:00Z',
+        end: '2023-11-13T16:30:00Z',
+        extension: {
+          ccLocation: {
+            address: {}
+          },
+          vistaStatus: [
+            'FUTURE'
+          ],
+          preCheckinAllowed: true,
+          eCheckinAllowed: true
+        }
+      }
+    end
+
+    let(:serialized_hash_response) do
+      {
+        data:
+          {
+            id: nil,
+            type: :vaos_appointment_data,
+            attributes:
+              {
+                appointments:
+                [
+                  appointment1, appointment2
+                ]
+              }
+          }
+      }
+    end
+
+    it 'returns a serialized hash' do
+      appt_struct = OpenStruct.new(vaos_appointment_data)
+      appt_serializer = subject.new(appt_struct)
+      expect(appt_serializer.serializable_hash).to eq(serialized_hash_response)
+    end
+  end
+
+  context 'Missing serialization key' do
+    let(:vaos_appointment_data_without_identifier) do
+      {
+        data: [
+          {
+            id: '180765',
+            kind: 'clinic',
+            status: 'booked',
+            serviceType: 'amputation',
+            patientIcn: '1013125218V696863',
+            locationId: '983GC',
+            clinic: '1081',
+            start: '2023-11-06T16:00:00Z',
+            end: '2023-11-06T16:30:00Z',
+            created: '2023-08-02T00:00:00Z',
+            cancellable: true,
+            extension: {
+              ccLocation: {
+                address: {}
+              },
+              vistaStatus: [
+                'NO ACTION TAKEN'
+              ],
+              preCheckinAllowed: true,
+              eCheckinAllowed: true
+            }
+          }
+        ]
+      }
+    end
+
+    let(:appointment_without_identifier) do
+      {
+        id: '180765',
+        kind: 'clinic',
+        status: 'booked',
+        serviceType: 'amputation',
+        locationId: '983GC',
+        clinic: '1081',
+        start: '2023-11-06T16:00:00Z',
+        end: '2023-11-06T16:30:00Z',
+        extension: {
+          ccLocation: {
+            address: {}
+          },
+          vistaStatus: [
+            'NO ACTION TAKEN'
+          ],
+          preCheckinAllowed: true,
+          eCheckinAllowed: true
+        }
+      }
+    end
+    let(:serialized_hash_response) do
+      {
+        data:
+          {
+            id: nil,
+            type: :vaos_appointment_data,
+            attributes:
+              {
+                appointments:
+                  [
+                    appointment_without_identifier
+                  ]
+              }
+          }
+      }
+    end
+
+    it 'identifier not present' do
+      appt_struct = OpenStruct.new(vaos_appointment_data_without_identifier)
+      appt_serializer = subject.new(appt_struct)
+      expect(appt_serializer.serializable_hash).to eq(serialized_hash_response)
+    end
+  end
+end