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devsofttech_hms_ci4/ABDM_IPD_DISCHARGE_FHIR_REFERENCE.md

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ABDM IPD Discharge Summary FHIR R4 Integration & Fixes

Last Updated: 2026-09-06
Module: ABDM Gateway / IPD Discharge FHIR Generator
Files Modified:

  • app/Libraries/Abdm/Fhir/Generators/DischargeFhirGenerator.php
  • app/Controllers/Ipd_discharge.php
  • app/Controllers/AbdmGateway.php
  • tests/unit/Abdm/FhirGeneratorsTest.php

1. Problem Summary

When generating and pushing an IPD Discharge Summary FHIR Bundle with attached PDF documents (Discharge Summary & IPD Bill) to an ABDM PHR app (e.g. ABHA / Aarogya Setu / Driefcase / Eka Care), the PHR application failed with:

"Error in parsing the data. your data is incorrect"

2. Root Cause Analysis (ABDM NRCES FHIR R4 Profile)

According to the official NRCES India ABDM FHIR R4 profile https://nrces.in/ndhm/fhir/r4/StructureDefinition/DischargeSummaryRecord:

  1. Composition Section Slicing Rules:

    • The discriminator for Composition.section is code.coding.code.
    • Every section slice has a strict cardinality of 0..1 (Max: 1).
    • Using non-standard codes or repeating slice codes (e.g., multiple sections with code 425044008) violates the profile.

  2. Code Discrepancies:

    • Medications Section: Previously assigned 721981007 (SNOMED for Diagnostic studies report / Investigations). Because PHR parsers expect DiagnosticReport entries under 721981007, receiving MedicationRequest entries triggered a schema validation error.
    • Discharge Diagnosis: Previously used code 397659008. In ABDM DischargeSummaryRecord, diagnoses must be grouped under the standard MedicalHistory slice (1003642006).
    • Procedures: Previously used code 371525003 instead of profile slice code 1003640003.
    • Care Plan / Advice: Previously used code 736271009 instead of profile slice code 734163000.

  3. Standard ABDM Discharge Summary Section Slices:

    Slice Name Standard SNOMED Code Standard Display Target Profile
    ChiefComplaints 422843007 Chief complaint section Condition
    MedicalHistory 1003642006 Past medical history section Condition, Procedure
    PhysicalExamination 425044008 Physical exam section Observation
    Procedures 1003640003 History of past procedure section Procedure
    Medications 1003606003 Medication history section MedicationRequest
    Investigations 721981007 Diagnostic studies report DiagnosticReportLab, DiagnosticReportImaging
    CarePlan 734163000 Care plan CarePlan
    DocumentReference 373942005 Discharge summary DocumentReference
    Allergies 722446000 Allergy record AllergyIntolerance
    FamilyHistory 422432008 Family history FamilyMemberHistory

  4. DocumentReference Requirements:

    • DocumentReference requires valid status, type, subject, content[0].attachment (contentType, data, title, creation), description, and text (XHTML narrative).

3. Implemented Fixes

  1. DischargeFhirGenerator.php:

    • Aligned all Composition.section slices to standard ABDM SNOMED codes and displays.
    • Merged diagnoses and clinical history under Medical History (1003642006).
    • Consolidated physical exam observations (admission/discharge) under single Physical Examination (425044008) slice.
    • Assigned correct Medications code (1003606003) to MedicationRequest entries.
    • Assigned Care Plan code (734163000) for follow-up and discharge advice.
    • Ensured DocumentReference includes description and valid text narrative.

  2. Ipd_discharge.php:

    • Added generateDischargeSummaryPdfBinary(int $ipdId, bool $withHeader = true) to render mPDF binaries and cache to writable/uploads/abdm/ipd/{ipdId}/discharge-summary.pdf.
    • Linked buildIpdPdfDocumentsList() to auto-generate and include the PDF binary in ABDM FHIR requests.

  3. AbdmGateway.php:

    • Integrated automatic generation of discharge summary PDFs when bundling or serving IPD care context records.

  4. Unit Tests:

    • Updated tests/unit/Abdm/FhirGeneratorsTest.php assertions to match standard section slice titles.
    • All 42 unit tests pass.

4. Verification Command

To dump and verify the IPD discharge bundle from CLI:

php spark fhir:dump

Output is saved to writable/ipd9_bundle.json.