generated: '2026-07-24'
method: derived
source:
- fhir/nextgen-enterprise-r4-capabilitystatement.json
- fhir/nextgen-office-r4-capabilitystatement.json
description: >-
  Entity-relationship graph for the NextGen FHIR APIs, derived from the US Core resource types
  advertised in the live R4 CapabilityStatements (28 for NextGen Enterprise, 26 for NextGen
  Office). Relationships follow the standard HL7 FHIR reference model: the Patient resource is the
  compartment root, and clinical/administrative resources reference it via subject/patient, with
  Encounter, Practitioner and Organization as the other primary hubs.
root_entity: Patient
entities:
- Patient
- AllergyIntolerance
- CarePlan
- CareTeam
- Condition
- Coverage
- Device
- DiagnosticReport
- DocumentReference
- Encounter
- Goal
- Immunization
- Location
- MedicationAdministration
- MedicationDispense
- MedicationRequest
- MedicationStatement
- Observation
- Organization
- Practitioner
- PractitionerRole
- Procedure
- Provenance
- Questionnaire
- QuestionnaireResponse
- RelatedPerson
- ServiceRequest
- Specimen
relationships:
- from: AllergyIntolerance
  to: Patient
  kind: belongs_to
  via: patient
- from: Condition
  to: Patient
  kind: belongs_to
  via: subject
- from: Observation
  to: Patient
  kind: belongs_to
  via: subject
- from: Observation
  to: Encounter
  kind: belongs_to
  via: encounter
- from: Procedure
  to: Patient
  kind: belongs_to
  via: subject
- from: Immunization
  to: Patient
  kind: belongs_to
  via: patient
- from: MedicationRequest
  to: Patient
  kind: belongs_to
  via: subject
- from: MedicationRequest
  to: Practitioner
  kind: belongs_to
  via: requester
- from: MedicationDispense
  to: MedicationRequest
  kind: belongs_to
  via: authorizingPrescription
- from: DiagnosticReport
  to: Patient
  kind: belongs_to
  via: subject
- from: DiagnosticReport
  to: Observation
  kind: has_many
  via: result
- from: DocumentReference
  to: Patient
  kind: belongs_to
  via: subject
- from: Encounter
  to: Patient
  kind: belongs_to
  via: subject
- from: Encounter
  to: Location
  kind: has_many
  via: location
- from: CarePlan
  to: Patient
  kind: belongs_to
  via: subject
- from: CareTeam
  to: Patient
  kind: belongs_to
  via: subject
- from: Goal
  to: Patient
  kind: belongs_to
  via: subject
- from: Coverage
  to: Patient
  kind: belongs_to
  via: beneficiary
- from: ServiceRequest
  to: Patient
  kind: belongs_to
  via: subject
- from: Specimen
  to: Patient
  kind: belongs_to
  via: subject
- from: PractitionerRole
  to: Practitioner
  kind: belongs_to
  via: practitioner
- from: PractitionerRole
  to: Organization
  kind: belongs_to
  via: organization
- from: RelatedPerson
  to: Patient
  kind: belongs_to
  via: patient
- from: Provenance
  to: Patient
  kind: belongs_to
  via: target