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Electronic Health Information (EHI) Export for Patient Population

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This document provides detailed information about the Electronic Health Information (EHI) export formats used by the certified health IT product for patient population export. The format complies with the ONC certification criterion §170.315(b)(10).

Population-Level Batch Export is implemented using AWS HealthLake FHIR-based batch export

Product Information #

  • Product Name: Legend EHR, LLC
  • Version: 5.3
  • Population Export Type: AWS HealthLake Bulk FHIR Export

Population-Level Batch Export (AWS HealthLake) #

For population-level data export, the system utilizes AWS HealthLake’s bulk export capabilities in compliance with the FHIR standard (FHIR R4). The export produces data in NDJSON (Newline Delimited JSON) format, with each line representing a complete FHIR resource.

Export Structure: #

  • Format: FHIR R4 Resources in NDJSON format
  • Compression: GZIP compressed bundles
  • Resource Types: Patient, Observation, Condition, Medication, Encounter, Procedure, etc.
  • Metadata: Export manifest with file checksums and resource counts

Key Features: #

  • Scalable export for entire patient populations
  • Incremental export support (delta changes)
  • Compressed output for efficient data transfer
  • FHIR-standard compliance for interoperability

Example AWS HealthLake Batch Export – Population Level #

File Structure:

text
export-2024-01-15/
├── Patient-1.ndjson.gz
├── Observation-1.ndjson.gz
├── Condition-1.ndjson.gz
├── Medication-1.ndjson.gz
└── export_manifest.json
Sample FHIR Resource (Patient.ndjson):
json
{“resourceType”:”Patient”,”id”:”patient-123″,”meta”:{“versionId”:”1″,”lastUpdated”:”2024-01-15T10:30:00Z”},”identifier”:[{“system”:”http://hospital.org/patient“,”value”:”12345″}],”name”:[{“use”:”official”,”family”:”Smith”,”given”:[“John”]}],”gender”:”male”,”birthDate”:”1980-05-15″}
{“resourceType”:”Patient”,”id”:”patient-124″,”meta”:{“versionId”:”1″,”lastUpdated”:”2024-01-15T10:31:00Z”},”identifier”:[{“system”:”http://hospital.org/patient“,”value”:”12346″}],”name”:[{“use”:”official”,”family”:”Doe”,”given”:[“Jane”]}],”gender”:”female”,”birthDate”:”1975-08-22″}
Export Manifest Example:
json
{
  “transactionTime”: “2024-01-15T10:00:00Z”,
  “requiresAccessToken”: false,
  “output”: [
    {
      “type”: “Patient”,
    },
    {
      “type”: “Observation”,
    }
  ],
  “error”: []
}

Validation and Compliance #

FHIR Export: Validated against FHIR R4 specification and AWS HealthLake compliance requirements

Public Accessibility #

This document serves as the publicly available documentation describing export format of the EHI data for patient population. It is intended to be linked via a publicly accessible hyperlink on the Certified Health IT Product List (CHPL) without preconditions or login requirements.

Versioning and Maintenance #

The product team maintains this documentation to ensure it reflects the current export formats. Any structural or version changes to export implementation will be reflected in future updates to this documentation.

Last Updated: January 2024
Export Format Versions: FHIR R4
Supported Standards: FHIR R4, ONC §170.315(b)(10)

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