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Bot: careui — fix footer inline style; it referenced --color-base--subtle, which is not a real token, so it always fell back to a hardcoded grey that failed contrast in dark mode - Claude
 
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{{OHC hero
{{OHC hero
|tagline=The open operating system for healthcare
|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]}}
}}
}}


<div class="ohc-search-trigger" id="ohc-main-search" role="button" tabindex="0" aria-label="Search the wiki">
<div class="ohc-search-trigger citizen-search-trigger" id="ohc-main-search" role="button" tabindex="0" aria-label="Search the wiki" data-citizen-search-prefill="">
<span class="ohc-search-trigger__icon">Search:</span>
<span class="ohc-search-trigger__icon">Search:</span>
<span>concepts, models, flows, guides...</span>
<span>concepts, models, flows, guides...</span>
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<div class="ohc-statsbar__item"><span class="ohc-statsbar__num">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='guide'|format=plainlist}}</span><span class="ohc-statsbar__label">Guides</span></div>
<div class="ohc-statsbar__item"><span class="ohc-statsbar__num">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='guide'|format=plainlist}}</span><span class="ohc-statsbar__label">Guides</span></div>
<div class="ohc-statsbar__item"><span class="ohc-statsbar__num">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='playbook'|format=plainlist}}</span><span class="ohc-statsbar__label">Playbooks</span></div>
<div class="ohc-statsbar__item"><span class="ohc-statsbar__num">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='playbook'|format=plainlist}}</span><span class="ohc-statsbar__label">Playbooks</span></div>
</div>

<!-- Knowledge components: doc-type showcase (mirrors Care·ui components-overview) -->
<div class="ohc-section-label">Knowledge components</div>
<div class="ohc-showcase">
<div class="ohc-showcase__card">
<div class="ohc-showcase__head"><span class="ohc-showcase__title">[[Documentation#Concepts|Concepts]]</span><span class="ohc-showcase__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='concept' AND Status='current'|format=plainlist}}</span></div>
<div class="ohc-showcase__desc">What is…? — definitions and platform primitives in plain language.</div>
<div class="ohc-showcase__go">[[Documentation#Concepts|Explore concepts →]]</div>
</div>
<div class="ohc-showcase__card">
<div class="ohc-showcase__head"><span class="ohc-showcase__title">[[Documentation#Flows|Flows]]</span><span class="ohc-showcase__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='flow' AND Status='current'|format=plainlist}}</span></div>
<div class="ohc-showcase__desc">How do I…? — step-by-step tasks for working in CARE.</div>
<div class="ohc-showcase__go">[[Documentation#Flows|Explore flows →]]</div>
</div>
<div class="ohc-showcase__card">
<div class="ohc-showcase__head"><span class="ohc-showcase__title">[[Documentation#References|References]]</span><span class="ohc-showcase__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='reference' AND Status='current'|format=plainlist}}</span></div>
<div class="ohc-showcase__desc">How is it built? — module-level technical detail for developers and integrators.</div>
<div class="ohc-showcase__go">[[Documentation#References|Explore references →]]</div>
</div>
<div class="ohc-showcase__card">
<div class="ohc-showcase__head"><span class="ohc-showcase__title">[[Documentation#Playbooks_&_guides|Guides]]</span><span class="ohc-showcase__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='guide' AND Status='current'|format=plainlist}}</span></div>
<div class="ohc-showcase__desc">Cross-cutting how-tos: contributing, deployment, and operations.</div>
<div class="ohc-showcase__go">[[Documentation#Playbooks_&_guides|Explore guides →]]</div>
</div>
<div class="ohc-showcase__card">
<div class="ohc-showcase__head"><span class="ohc-showcase__title">[[Documentation#Playbooks_&_guides|Playbooks]]</span><span class="ohc-showcase__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=DocType='playbook' AND Status='current'|format=plainlist}}</span></div>
<div class="ohc-showcase__desc">Real-world scenarios: HMIS, palliative care, and facility operations.</div>
<div class="ohc-showcase__go">[[Documentation#Playbooks_&_guides|Explore playbooks →]]</div>
</div>
</div>
</div>


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<div class="ohc-navgrid">
<div class="ohc-navgrid">
<div class="ohc-navpill">[[Documentation|All docs]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation|All docs]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Clinical]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='clinical'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Clinical|Clinical]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='clinical'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Billing]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='billing'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Billing|Billing]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='billing'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Facility]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='facility'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Facility|Facility]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='facility'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Medications]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='medications'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Medications|Medications]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='medications'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Scheduling]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='scheduling'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Scheduling|Scheduling]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='scheduling'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Supply]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='supply'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Supply|Supply]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='supply'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Definitions]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='definitions'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Definitions|Definitions]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='definitions'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Access]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='access-governance'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Access governance|Access]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='access-governance'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Special:RunQuery/Docs domain|Platform]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='platform'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Documentation/Platform|Platform]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='platform'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Contributing|Contributing]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='contributing'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Contributing|Contributing]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='contributing'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Deployment|Deployment]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='deployment'|format=plainlist}}</span></div>
<div class="ohc-navpill">[[Deployment|Deployment]] <span class="ohc-navpill__count">{{#cargo_query:tables=Docs|fields=COUNT(*)=n|where=Domain='deployment'|format=plainlist}}</span></div>
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<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Concepts/Observation|Observation]]</div><div class="ohc-quicklink__desc">Vital signs, lab results, clinical assessments — the measurement primitive.</div></div>
<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Concepts/Observation|Observation]]</div><div class="ohc-quicklink__desc">Vital signs, lab results, clinical assessments — the measurement primitive.</div></div>
<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Concepts/Organization|Organization]]</div><div class="ohc-quicklink__desc">The access-control tree: health system → hospital → department → ward.</div></div>
<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Concepts/Organization|Organization]]</div><div class="ohc-quicklink__desc">The access-control tree: health system → hospital → department → ward.</div></div>
<div class="ohc-quicklink"><div class="ohc-quicklink__title">[[Flows/Create a patient|Create 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">[[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 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>
</div>


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<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/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 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>
</div>


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<div class="ohc-section-label">About the foundation</div>
<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}}
{{#invoke:OHC/data|ul|layers}}


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<!-- Footer links -->
<!-- Footer links -->
<div style="text-align: center; margin: 2em 0 0.5em; padding-top: 1em; border-top: 1px solid var(--border-color-base, #c8ccd1); font-size: 0.9em; color: var(--color-base--subtle, #54595d);">
<div style="text-align: center; margin: 2em 0 0.5em; padding-top: 1em; border-top: 1px solid var(--ohc-border); font-size: 0.9em; color: var(--ohc-soft-foreground);">
[[Documentation|All docs]] · [[Special:CargoTables|Cargo tables]] · [[Special:Categories|Categories]] · [[Special:RecentChanges|Recent changes]] · [[Sandbox/Version demo|Version demo]]
[[Documentation|All docs]] · [[Special:CargoTables|Cargo tables]] · [[Special:Categories|Categories]] · [[Special:RecentChanges|Recent changes]]
</div>
</div>


Latest revision as of 12:52, 12 August 2026

Open Healthcare Network
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
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
FHIR R5
SNOMED CT
LOINC
UCUM
ICD-10
ABDM
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 &amp; totals
Account cached_items Balances &amp; totals
Account service_period Status
Account extensions Tags &amp; extensions
AllergyIntolerance code Substance &amp; coding
AllergyIntolerance onset Timing
BaseModels&Conventions history EMRBaseModel fields
BaseModels&Conventions meta EMRBaseModel fields
ChargeItem code Description &amp; status
ChargeItem override_reason Pricing
ChargeItem unit_price_components Pricing
ChargeItem total_price_components Pricing

More...

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


The nonprofit foundation that builds and stewards CARE, an open operating system for healthcare.

The nonprofit foundation that builds and stewards CARE, an open operating system for healthcare.

The stable platform slab of CARE, providing reusable primitives such as patients, facilities, encounters, orders and observations.

Open Healthcare Network's flagship product: an open-source, FHIR-native electronic medical record (EMR) and healthcare operating system.

Fast Healthcare Interoperability Resources — an HL7 standard for exchanging healthcare data. CARE is built on FHIR R5.

Electronic Medical Record — the digital record of a patient's clinical information.

Hospital Management Information System — software covering registration, encounters, labs, pharmacy, billing and reporting.

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