diff --git a/canvas_sdk/v1/data/lab.py b/canvas_sdk/v1/data/lab.py
index abf15dac..3ac38c0f 100644
--- a/canvas_sdk/v1/data/lab.py
+++ b/canvas_sdk/v1/data/lab.py
@@ -1,10 +1,21 @@
 from django.db import models
 
 from canvas_sdk.v1.data.base import CommittableModelManager
+from canvas_sdk.v1.data.condition import Condition
 from canvas_sdk.v1.data.patient import Patient
+
+# from canvas_sdk.v1.data.staff import Staff
 from canvas_sdk.v1.data.user import CanvasUser
 
 
+class TransmissionType(models.TextChoices):
+    """Choices for transmission types."""
+
+    FAX = "F", "fax"
+    HL7 = "H", "hl7"
+    MANUAL = "M", "manual"
+
+
 class LabReport(models.Model):
     """A class representing a lab report."""
 
@@ -23,19 +34,23 @@ class Meta:
     junked = models.BooleanField()
     requires_signature = models.BooleanField()
     assigned_date = models.DateTimeField()
-    patient = models.ForeignKey(Patient, on_delete=models.DO_NOTHING, related_name="lab_reports")
-    transmission_type = models.CharField()
+    patient = models.ForeignKey(
+        Patient, on_delete=models.DO_NOTHING, related_name="lab_reports", null=True
+    )
+    transmission_type = models.CharField(choices=TransmissionType)
     for_test_only = models.BooleanField()
     external_id = models.CharField()
     version = models.IntegerField()
     requisition_number = models.CharField()
-    review = models.ForeignKey("LabReview", related_name="reports", on_delete=models.DO_NOTHING)
+    review = models.ForeignKey(
+        "LabReview", related_name="reports", on_delete=models.DO_NOTHING, null=True
+    )
     original_date = models.DateTimeField()
     date_performed = models.DateTimeField()
     custom_document_name = models.CharField()
     originator = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
-    committer = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
-    entered_in_error = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
+    committer = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING, null=True)
+    entered_in_error = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING, null=True)
     deleted = models.BooleanField()
 
 
@@ -55,12 +70,12 @@ class Meta:
     modified = models.DateTimeField()
     originator = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
     deleted = models.BooleanField()
-    committer = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
-    entered_in_error = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
+    committer = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING, null=True)
+    entered_in_error = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING, null=True)
     internal_comment = models.TextField()
     message_to_patient = models.CharField()
     status = models.CharField()
-    patient = models.ForeignKey(Patient, on_delete=models.DO_NOTHING)
+    patient = models.ForeignKey(Patient, on_delete=models.DO_NOTHING, related_name="lab_reviews")
     patient_communication_method = models.CharField()
 
 
@@ -76,7 +91,9 @@ class Meta:
     dbid = models.BigIntegerField(primary_key=True)
     created = models.DateTimeField()
     modified = models.DateTimeField()
-    report = models.ForeignKey("LabReport", related_name="values", on_delete=models.DO_NOTHING)
+    report = models.ForeignKey(
+        "LabReport", related_name="values", on_delete=models.DO_NOTHING, null=True
+    )
     value = models.TextField()
     units = models.CharField()
     abnormal_flag = models.CharField()
@@ -98,7 +115,162 @@ class Meta:
     dbid = models.BigIntegerField(primary_key=True)
     created = models.DateTimeField()
     modified = models.DateTimeField()
-    value = models.ForeignKey(LabValue, on_delete=models.DO_NOTHING, related_name="codings")
+    value = models.ForeignKey(
+        LabValue, on_delete=models.DO_NOTHING, related_name="codings", null=True
+    )
     code = models.CharField()
     name = models.CharField()
     system = models.CharField()
+
+
+class LabOrder(models.Model):
+    """A class representing a lab order."""
+
+    class SpecimenCollectionType(models.TextChoices):
+        """Choices for specimen collection types."""
+
+        ON_LOCATION = "L", "on location"
+        PATIENT_SERVICE_CENTER = "P", "patient service center"
+        OTHER = "O", "other"
+
+    class CourtesyCopyType(models.TextChoices):
+        """Choices for courtesy copy types."""
+
+        ACCOUNT = "A", "account"
+        FAX = "F", "fax"
+        PATIENT = "P", "patient"
+
+    class ManualProcessingStatus(models.TextChoices):
+        """Choices for manual processing statuses."""
+
+        MANUAL_PROCESSING_STATUS_NEEDS_REVIEW = "NEEDS_REVIEW", "Needs Review"
+        MANUAL_PROCESSING_STATUS_IN_PROGRESS = "IN_PROGRESS", "In Progress"
+        MANUAL_PROCESSING_STATUS_PROCESSED = "PROCESSED", "Processed"
+        MANUAL_PROCESSING_STATUS_FLAGGED = "FLAGGED", "Flagged"
+
+    class Meta:
+        managed = False
+        app_label = "canvas_sdk"
+        db_table = "canvas_sdk_data_api_laborder_001"
+
+    id = models.UUIDField()
+    dbid = models.BigIntegerField(primary_key=True)
+    created = models.DateTimeField()
+    modified = models.DateTimeField()
+    originator = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
+    deleted = models.BooleanField()
+    committer = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING, null=True)
+    entered_in_error = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING, null=True)
+    patient = models.ForeignKey(Patient, on_delete=models.DO_NOTHING, related_name="lab_orders")
+    ontology_lab_partner = models.CharField()
+    # TODO - uncomment when the Note model is finished
+    # note = models.ForeignKey("Note", on_delete=models.DO_NOTHING)
+    comment = models.CharField()
+    requisition_number = models.CharField()
+    is_patient_bill = models.BooleanField(null=True)
+    date_ordered = models.DateTimeField()
+    fasting_status = models.BooleanField(null=True)
+    specimen_collection_type = models.CharField(choices=SpecimenCollectionType, null=True)
+    transmission_type = models.CharField(choices=TransmissionType, null=True)
+    courtesy_copy_type = models.CharField(choices=CourtesyCopyType, null=True)
+    courtesy_copy_number = models.CharField()
+    courtesy_copy_text = models.CharField()
+    # TODO - uncomment when Staff model is added
+    # ordering_provider = models.ForeignKey(Staff, on_delete=models.DO_NOTHING, null=True)
+    parent_order = models.ForeignKey("LabOrder", on_delete=models.DO_NOTHING, null=True)
+    healthgorilla_id = models.CharField()
+    manual_processing_status = models.CharField(choices=ManualProcessingStatus)
+    manual_processing_comment = models.CharField()
+    labcorp_abn_url = models.URLField()
+
+
+class LabOrderReason(models.Model):
+    """A class representing a lab order reason."""
+
+    class LabReasonMode(models.TextChoices):
+        """Choices for lab order reasons."""
+
+        MONITOR = "MO", "monitor"
+        INVESTIGATE = "IN", "investigate"
+        SCREEN_FOR = "SF", "screen for"
+        UNKNOWN = "UNK", "unknown"
+
+    class Meta:
+        managed = False
+        app_label = "canvas_sdk"
+        db_table = "canvas_sdk_data_api_laborderreason_001"
+
+    dbid = models.BigIntegerField(primary_key=True)
+    created = models.DateTimeField()
+    modified = models.DateTimeField()
+    originator = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
+    deleted = models.BooleanField()
+    committer = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
+    entered_in_error = models.ForeignKey(CanvasUser, on_delete=models.DO_NOTHING)
+    order = models.ForeignKey(LabOrder, on_delete=models.DO_NOTHING, related_name="reasons")
+    mode = models.CharField(max_length=30, choices=LabReasonMode)
+
+
+class LabOrderReasonCondition(models.Model):
+    """A class representing a lab order reason's condition."""
+
+    class Meta:
+        managed = False
+        app_label = "canvas_sdk"
+        db_table = "canvas_sdk_data_api_laborderreasoncondition_001"
+
+    dbid = models.BigIntegerField(primary_key=True)
+    created = models.DateTimeField()
+    modified = models.DateTimeField()
+    reason = models.ForeignKey(
+        LabOrderReason, on_delete=models.DO_NOTHING, related_name="reason_conditions", null=True
+    )
+    condition = models.ForeignKey(
+        Condition,
+        on_delete=models.DO_NOTHING,
+        related_name="lab_order_reason_conditions",
+        null=True,
+    )
+
+
+class LabTest(models.Model):
+    """A class representing a lab test."""
+
+    class LabTestOrderStatus(models.TextChoices):
+        """Choicees for lab test order statuses."""
+
+        NEW = "NE", "new"
+        STAGED_FOR_REQUISITION = "SR", "staged for requisition"
+        SENDING = "SE", "sending"
+        SENDING_FAILED = "SF", "sending failed"
+        PROCESSING = "PR", "processing"
+        PROCESSING_FAILED = "PF", "processing failed"
+        RECEIVED = "RE", "received"
+        REVIEWED = "RV", "reviewed"
+        INACTIVE = "IN", "inactive"
+
+    class Meta:
+        managed = False
+        app_label = "canvas_sdk"
+        db_table = "canvas_sdk_data_api_labtest_001"
+
+    id = models.UUIDField()
+    dbid = models.BigIntegerField(primary_key=True)
+    ontology_test_name = models.CharField(max_length=512, blank=True, default="")
+    ontology_test_code = models.CharField(max_length=512, blank=True, default="")
+    status = models.CharField(max_length=30, choices=LabTestOrderStatus)
+    report = models.ForeignKey(
+        LabReport, on_delete=models.DO_NOTHING, null=True, related_name="tests"
+    )
+    aoe_code = models.CharField(max_length=10, default="")
+    procedure_class = models.CharField(max_length=10, default="")
+    specimen_type = models.CharField()
+    specimen_source_code = models.CharField()
+    specimen_source_description = models.CharField()
+    specimen_source_coding_system = models.CharField()
+    order = models.ForeignKey(
+        LabOrder, on_delete=models.DO_NOTHING, related_name="tests", null=True
+    )
+
+    def __str__(self) -> str:
+        return f"{self.ontology_test_name}: f{self.ontology_test_code}"
diff --git a/canvas_sdk/v1/data/patient.py b/canvas_sdk/v1/data/patient.py
index 39564bba..1fc962ee 100644
--- a/canvas_sdk/v1/data/patient.py
+++ b/canvas_sdk/v1/data/patient.py
@@ -50,3 +50,6 @@ class Meta:
     def find(cls, id: str) -> Self:
         """Find a patient by id."""
         return cls._default_manager.get(id=id)
+
+    def __str__(self) -> str:
+        return f"{self.first_name} {self.last_name}"