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The open operating system for healthcare
OHC Foundation stewards CARE Core, apps, standards, and integrations so governments, hospitals, and implementers can run interoperable health systems without vendor lock-in. CARE is the FHIR-native, open-source EMR from Open Healthcare Network — this wiki is the single source of truth for its concepts, technical references, deployment guides, and playbooks.
Search: concepts, models, flows, guides... /
Knowledge components
How is it built? — module-level technical detail for developers and integrators.
Real-world scenarios: HMIS, palliative care, and facility operations.
Browse by domain
All docs 416
Clinical 82
Billing 28
Facility 25
Medications 23
Scheduling 18
Supply 46
Definitions 38
Access 32
Platform 26
Deployment 15
Start here
The longitudinal anchor — every encounter, observation, and order links back here.
A bounded period of care: OP visit, IP admission, emergency attendance.
Vital signs, lab results, clinical assessments — the measurement primitive.
The access-control tree: health system → hospital → department → ward.
Step-by-step: from search to a saved record ready for an encounter.
Run Care locally, understand the stack, submit changes upstream.
Solutions
Hospital management workflows for registration, encounters, labs, pharmacy, billing, reports, and patient portal.
Hub-and-spoke critical care workflows with remote rounds, escalation, devices, and video context.
Home-based care coordination, longitudinal records, tasks, referrals, follow-up, and field workflows.
Primary care and outpatient workflows for scheduling, prescriptions, investigations, and continuity.
Animal health workflows built on the same open-core pattern for facilities and field programs.
Standards & architecture
Deploy & operate
Two-node cluster running Care + every supporting service — no cloud dependencies.
Helm charts, values overlays, and the apply order for a fresh cluster.
AWS ECS, GCP GKE, DigitalOcean App Platform — pick your target.
Encryption at rest, in transit, access controls, and audit logging.
Technical reference — live model data
Find any field across all 35 Django models via the ModelField table. Example: all JSONField columns in Care:
| Model | Field | Section |
|---|---|---|
| Account | total_price_components | Balances & totals |
| Account | cached_items | Balances & totals |
| Account | service_period | Status |
| Account | extensions | Tags & extensions |
| AllergyIntolerance | code | Substance & coding |
| AllergyIntolerance | onset | Timing |
| BaseModels&Conventions | history | EMRBaseModel fields |
| BaseModels&Conventions | meta | EMRBaseModel fields |
| ChargeItem | code | Description & status |
| ChargeItem | override_reason | Pricing |
| ChargeItem | unit_price_components | Pricing |
| ChargeItem | total_price_components | Pricing |
Playbooks
Outpatient registration, encounter queues, and hospital-desk scenarios.
Patient enrollment, home visits, and care grid workflows.
Who it's for
About the foundation
The OHC Foundation stewards the shared core so health systems can deploy modern software without vendor lock-in:
- Core platform
- Standards
- Quality and security
- Ecosystem
- AI readiness
I had a chance to meet with the Open Healthcare Network, it's fantastic to see what they are doing.
Satya Nadella— CEO, Microsoft