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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.

Browse documentationStart contributingExplore CAREohc.network

Search: concepts, models, flows, guides... /

Verified DPGMIT licensedSelf-hostableFHIR-native

54Concepts

102References

780Model fields

31Guides

7Playbooks

Knowledge components

Concepts54

What is…? — definitions and platform primitives in plain language.

Explore concepts →

Flows216

How do I…? — step-by-step tasks for working in CARE.

Explore flows →

References98

How is it built? — module-level technical detail for developers and integrators.

Explore references →

Guides31

Cross-cutting how-tos: contributing, deployment, and operations.

Explore guides →

Playbooks7

Real-world scenarios: HMIS, palliative care, and facility operations.

Explore playbooks →

Browse by domain

All docs 417

Clinical 82

Billing 28

Facility 25

Medications 23

Scheduling 18

Supply 46

Definitions 38

Access 32

Platform 26

Contributing 7

Deployment 16

Start here

Patient

The longitudinal anchor — every encounter, observation, and order links back here.

Encounter

A bounded period of care: OP visit, IP admission, emergency attendance.

Observation

Vital signs, lab results, clinical assessments — the measurement primitive.

Organization

The access-control tree: health system → hospital → department → ward.

Register a patient

Step-by-step: from search to a saved record ready for an encounter.

Contributing guide

Run Care locally, understand the stack, submit changes upstream.

Solutions

CARE HMIS

Hospital management workflows for registration, encounters, labs, pharmacy, billing, reports, and patient portal.

TeleICU

Hub-and-spoke critical care workflows with remote rounds, escalation, devices, and video context.

Palliative Care Grid

Home-based care coordination, longitudinal records, tasks, referrals, follow-up, and field workflows.

Care Clinics

Primary care and outpatient workflows for scheduling, prescriptions, investigations, and continuity.

Care Janwar

Animal health workflows built on the same open-core pattern for facilities and field programs.

Standards & architecture

Deploy & operate

Kubernetes reference architecture

Two-node cluster running Care + every supporting service — no cloud dependencies.

Deploying Care

Helm charts, values overlays, and the apply order for a fresh cluster.

Cloud providers

AWS ECS, GCP GKE, DigitalOcean App Platform — pick your target.

Data security

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

More...

→ Browse all 500 fields

Playbooks

HMIS playbook

Outpatient registration, encounter queues, and hospital-desk scenarios.

Palliative care playbook

Patient enrollment, home visits, and care grid workflows.

Who it's for

Governments

Funders

Hospitals

Implementation partners

Developers

Clinicians

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

All docs · Cargo tables · Categories · Recent changes

@@ Line 3: / Line 3: @@
 {{OHC hero
 |tagline=The open operating system for healthcare
-|summary=CARE is the FHIR-native, open-source EMR from Open Healthcare Network. This wiki is the single source of truth for concepts, technical references, deployment guides, and playbooks.
+|summary=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.
-|cta={{OHC button|[[Documentation|Browse documentation]]}}{{OHC button|ghost=1|[[Contributing|Start contributing]]}}{{OHC button|ghost=1|[https://ohc.network ohc.network]}}
+|cta={{OHC button|[[Documentation|Browse documentation]]}}{{OHC button|ghost=1|[[Contributing|Start contributing]]}}{{OHC button|ghost=1|[[CARE (software)|Explore CARE]]}}{{OHC button|ghost=1|[https://ohc.network ohc.network]}}
 }}
@@ Line 80: / Line 80: @@
 <div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Flows/Register a patient|Register a patient]]</div><div class="ohc-quicklink__desc">Step-by-step: from search to a saved record ready for an encounter.</div></div>
 <div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Contributing|Contributing guide]]</div><div class="ohc-quicklink__desc">Run Care locally, understand the stack, submit changes upstream.</div></div>
+</div>
+<!-- Solutions: deployable workflows (mirrors ohc.network) -->
+<div class="ohc-section-label">Solutions</div>
+<div class="ohc-quicklinks">
+<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[CARE HMIS]]</div><div class="ohc-quicklink__desc">Hospital management workflows for registration, encounters, labs, pharmacy, billing, reports, and patient portal.</div></div>
+<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[TeleICU]]</div><div class="ohc-quicklink__desc">Hub-and-spoke critical care workflows with remote rounds, escalation, devices, and video context.</div></div>
+<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Palliative Care Grid]]</div><div class="ohc-quicklink__desc">Home-based care coordination, longitudinal records, tasks, referrals, follow-up, and field workflows.</div></div>
+<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Care Clinics]]</div><div class="ohc-quicklink__desc">Primary care and outpatient workflows for scheduling, prescriptions, investigations, and continuity.</div></div>
+<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Care Janwar]]</div><div class="ohc-quicklink__desc">Animal health workflows built on the same open-core pattern for facilities and field programs.</div></div>
+</div>
+<!-- Standards -->
+<div class="ohc-section-label">Standards & architecture</div>
+<div class="ohc-navgrid">
+<div class="ohc-navpill">[[Standards and architecture|FHIR R5]]</div>
+<div class="ohc-navpill">[[Standards and architecture|SNOMED CT]]</div>
+<div class="ohc-navpill">[[Standards and architecture|LOINC]]</div>
+<div class="ohc-navpill">[[Standards and architecture|UCUM]]</div>
+<div class="ohc-navpill">[[Standards and architecture|ICD-10]]</div>
+<div class="ohc-navpill">[[Standards and architecture|ABDM]]</div>
 </div>
@@ Line 112: / Line 133: @@
 <div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Playbooks/HMIS|HMIS playbook]]</div><div class="ohc-quicklink__desc">Outpatient registration, encounter queues, and hospital-desk scenarios.</div></div>
 <div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Playbooks/Palliative|Palliative care playbook]]</div><div class="ohc-quicklink__desc">Patient enrollment, home visits, and care grid workflows.</div></div>
+</div>
+<!-- Who it's for (mirrors ohc.network audiences) -->
+<div class="ohc-section-label">Who it's for</div>
+<div class="ohc-navgrid">
+<div class="ohc-navpill">[https://ohc.network/contact Governments]</div>
+<div class="ohc-navpill">[https://ohc.network/support Funders]</div>
+<div class="ohc-navpill">[[CARE HMIS|Hospitals]]</div>
+<div class="ohc-navpill">[[Contributing|Implementation partners]]</div>
+<div class="ohc-navpill">[[Contributing|Developers]]</div>
+<div class="ohc-navpill">[[Contributing|Clinicians]]</div>
 </div>
@@ Line 117: / Line 149: @@
 <div class="ohc-section-label">About the foundation</div>
-The '''[[Open Healthcare Network Foundation|OHC Foundation]]''' stewards the shared core so health systems can deploy modern software without vendor lock-in:
+The '''[[Open Healthcare Network|OHC Foundation]]''' stewards the shared core so health systems can deploy modern software without vendor lock-in:
 {{#invoke:OHC/data|ul|layers}}