EMR Data Migration Services
Migrate clinical data from any legacy EMR to your new system — HL7 v2, CDA, and structured data to FHIR R4, with full validation, reconciliation, and zero clinical data loss.
The Challenge
EMR Migrations Carry Clinical and Regulatory Risk — They Must Be Done Right
An EMR migration is not a standard data migration. Clinical records contain decades of patient history, medication records, lab results, and care plans. A missed allergy, a lost medication record, or a duplicated patient record is not a data quality issue — it is a patient safety event. Beyond clinical risk, EMR migrations carry regulatory risk: HIPAA compliance must be maintained throughout, audit trails must be preserved, and clinicians must have continuity of access to patient records throughout the cutover. The technical complexity of transforming legacy HL7 v2 messages, CDA documents, and proprietary database exports into FHIR R4 resources — with correct terminology mapping, patient matching, and relationship preservation — requires specialist healthcare data engineering expertise.
Deliverables
EMR Migration Capabilities
- Legacy format parsing — HL7 v2.x message processing (ADT, ORM, ORU, MDM, DFT), CDA R2 document parsing, CSV/flat file clinical data extraction
- FHIR R4 transformation — mapping to FHIR Patient, Encounter, Observation, Condition, MedicationRequest, AllergyIntolerance, DiagnosticReport, and DocumentReference resources
- Terminology mapping — ICD-9 to ICD-10, SNOMED CT, LOINC, RxNorm mapping with custom code system support and unmapped code handling
- Patient matching and deduplication — probabilistic matching across source systems using demographics, MRN, and clinical identifiers
- Data validation and reconciliation — row-level counts, aggregate statistics, clinical spot checks, and automated validation rules
- Cutover planning — phased migration strategy, rollback procedures, read-only period management, and clinician communication
- Zero-downtime migration — dual-write, catch-up, and cutover approach that maintains clinical access throughout the migration
- Epic, Cerner, Athena target system configuration — working with vendor professional services on configuration, testing, and go-live
- HIPAA compliance throughout — encrypted pipelines, PHI access logging, BAA management, and data retention during migration
- Post-migration support — data quality monitoring, issue resolution, and reconciliation reporting
Stack
Migration Technology Stack
Process
Migration Delivery Process
A clear, predictable engagement model with no surprises.
Source System Analysis
Extract and profile source data — volume, format quality, terminology coverage, patient population, and clinical domain coverage. Identify data gaps, format inconsistencies, and complex cases requiring manual handling.
Mapping & Transformation Design
Design field-level mappings for every source format to the target FHIR profile set. Define terminology mapping rules, patient matching algorithm, and business rules for clinical edge cases.
Pipeline Build & Initial Load
Build and test the ETL pipeline. Perform initial full load against a test environment. Validate output against source counts and run automated data quality rules.
Clinical Validation & UAT
Present sampled migrated records to clinical staff for review. Resolve issues identified. Run full reconciliation report. Obtain sign-off from clinical leadership before cutover.
Cutover & Go-Live
Execute delta migration for data created since initial load. Perform final reconciliation. Execute cutover according to agreed plan. Hypercare period with 24-hour support for clinical issues.
FAQ
Frequently Asked Questions
Planning an EMR Migration?
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