Cerner-to-Epic data migration — step-by-step
The short answer: Cerner-to-Epic migration is the dominant 2024–2026 migration pattern for commercial IDNs that adopted Epic after a Cerner Millennium deployment. The pattern follows three workstreams: clinical-data mapping (Cerner CCL/PowerChart → Epic Foundation), defensible archival of Cerner historical records via BytePad, and a credentialed go-live bench. Typical single-IDN duration is 12–18 months.
Key takeaways
- Three-workstream pattern: mapping, archival, cutover bench
- Bring forward active patients' problem list, meds, allergies, immunizations, look-back notes
- Archive everything else into BytePad with FOIA / chart-recall workflows intact
- Cerner Bedrock mapping to Epic Foundation is the standard reference pattern
- Standard duration: 12–18 months single-IDN; 18–36 months multi-IDN enterprise
The numbers
Three sub-patterns for Cerner-to-Epic
Sub-pattern A — clean Epic implementation with archived Cerner history. Best when active-patient overlap is small and historical access is occasional. Archive captures the full Cerner corpus; Epic is the system of record from go-live forward.
Sub-pattern B — Cerner Bedrock mapping to Epic Foundation, common for academic medical centers. Detailed clinical-content mapping (order sets, doc templates, smart phrases) plus a defined look-back window of Cerner clinical data brought forward.
Sub-pattern C — Cerner Millennium to Epic with phased ancillary migration. Used when surgical, lab, or radiology systems are being modernized alongside the EHR cutover.
Clinical-data mapping reference
Standard target mappings used by InterScripts:
- Cerner PowerChart structured data → Epic Foundation (Problem List, Medication List, Allergies, Immunizations)
- Cerner clinical notes → Epic clinical documents via C-CDA + FHIR DocumentReference
- Cerner labs (PathNet) → Epic Beaker / external lab gateway
- Cerner Radiology (RadNet) → Epic Radiant + PACS integration
- Cerner billing (RevElate) → Epic Resolute Hospital Billing / Professional Billing
- Historical Cerner corpus → BytePad archival with FHIR + C-CDA exposure
Frequently asked questions
How long does a Cerner-to-Epic migration take?
A single-IDN Cerner-to-Epic migration typically runs 12–18 months from project kickoff to go-live, with a 2–4 week at-elbow support window and a 3–6 month optimization tail. Multi-IDN enterprise programs run 18–36 months.
What Cerner data should migrate forward to Epic?
For active patients: problem list, medication list, allergy list, immunization record, and a clinically relevant look-back window of notes. Everything else — historical encounters past the look-back window, financial records past AR transition, ancillary system data — goes to archive.
Does InterScripts migrate Cerner Bedrock content to Epic Foundation?
Yes. Cerner Bedrock to Epic Foundation mapping is the standard reference pattern for academic medical centers. Order sets, doc templates, and smart-phrase libraries are mapped under credentialed analyst supervision.
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