Health Cloud: History objects for clinical objects not available in Custom Report Type builder

Step 1: Confirm Field History Tracking is enabled on the clinical object

Navigate to Setup > Object Manager > [Clinical Object, for example MedicationRequest, CareRequest, HealthcareProvider, MemberPlan, HealthcarePractitionerFacility] > Fields & Relationships > Set History Tracking. Select Enable [Object] History, select the fields to track (up to 20 standard, or up to 60 with Field Audit Trail), and click Save.

Step 2: Verify the history object exists and contains data

Open the Developer Console > Query Editor and run a SOQL query against the history object, for example:

SELECT Id, ParentId, Field, OldValue, NewValue, CreatedById, CreatedDate 
FROM MedicationRequestHistory 
LIMIT 10
Replace MedicationRequestHistory with CareRequestHistory, HealthcareProviderHistory, MemberPlanHistory, HealthcarePractitionerFacilityHistory, CareBarrierHistory, DiagnosticSummaryHistory, or PatientMedicalProcedureHistory as appropriate.

If rows are returned, history is being captured correctly even though the object is not exposed in the CRT builder.

Step 3: Expose the history data on the record page using the History related list (supported alternative)

Navigate to Setup > Object Manager > [Clinical Object] > Page Layouts > [Layout Name] > Related Lists. Drag the [Object Name] History related list (for example "Medication Request History") onto the layout and click Save. Users can now view per-record history directly on the record page.

Cause 1: Industry Cloud history objects are not exposed in the Custom Report Type builder
Confirm in Setup > Custom Report Types > New Custom Report Type that the history object (for example MedicationRequestHistory, CareRequestHistory, HealthcareProviderHistory, MemberPlanHistory, PatientMedicalProcedureHistory) does not appear in the Primary Object dropdown.
Confirm that with the clinical object selected as Primary, the history sub-object does not appear under "A related '[Object]' record". This is a current limitation for Industry Cloud / Health Cloud standard objects.

Workaround: Build an external report using the Salesforce Reports and Dashboards REST API, Tableau, or CRM Analytics, and source the history sub-object directly via SOQL. The history object is fully queryable through the API.

Cause 2: Master-detail children of an Industry Cloud object cannot be reported with their parent's history
If the clinical object is the detail side of a master-detail relationship, the standard "[Object] History" Custom Report Type may not be available in the CRT builder.

Workaround: Use SOQL against the history sub-object as in Step 2 above, or expose the History related list on the parent record's page layout as described in Step 3.

Cause 3: FieldHistoryArchive does not contain the data
FieldHistoryArchive is populated only when Field Audit Trail (FAT) retention policies are configured and the original field history records have aged past the standard 18-month retention window. Recently changed records remain in the [Object]History sub-object, not in FieldHistoryArchive.

Resolution: To extend retention, license Field Audit Trail and configure a HistoryRetentionPolicy on the clinical object using the Metadata API. Until records age out under that policy, query [Object]History (for example HealthcareProviderHistory) instead of FieldHistoryArchive.

Confirm the issue is resolved by:

1.Running the following query in the Developer Console:

SELECT Id, Field, OldValue, NewValue, CreatedDate 
FROM [Object]History 
WHERE ParentId = '[Record Id]'

2. Verifying that the field changes you expected to report on are returned
3. Viewing the [Object Name] History related list on the parent record page