Electronic Health Record (EHR) App Backend Template
Longitudinal patient records, encounter documentation, signed note workflows, and traceable audit history
A production-ready EHR backend on Back4app for comprehensive patient clinical history, versioned notes, and multi-signature approval flows. Use it to ship healthcare products faster across web and mobile while preserving traceability.
Key Takeaways
This template gives you a clinical-documentation-ready backend for patient records, encounters, note revisions, and co-signature processes so teams can focus on care workflows instead of rebuilding backend foundations.
- Longitudinal patient chart model — Organize demographics, identifiers, encounters, and clinical entries in a structure built for complete patient history views.
- Versioned medical note workflow — Track draft, reviewed, amended, and signed note revisions so documentation history remains explicit and queryable.
- Multi-signature support — Collect attending, resident, specialist, or supervisor signatures with status tracking and timestamped approvals.
- Auditability for chart access — Capture meaningful access and change events to support internal review, compliance reporting, and operational troubleshooting.
- Cross-platform delivery — Serve portals, clinician workstations, and mobile charting apps through REST and GraphQL with optional Live Queries.
What Is the Electronic Health Record (EHR) App Backend Template?
Back4app is a managed backend for rapid product delivery. The Electronic Health Record (EHR) App Backend Template models patients, encounters, note versions, signatures, and audit events so teams can implement healthcare documentation products with a strong backend contract from day one.
Best for:
Overview
Clinical documentation systems must balance usability with traceability. Teams need complete patient timelines, structured encounter records, controlled note revisions, and reliable approval paths for signatures and amendments.
This template defines Patient, Encounter, MedicalNote, NoteSignature, and AuditEvent with ownership rules and optional Live Queries so teams can build EHR experiences quickly and consistently.
Core EHR Features
Every technology card in this hub uses the same EHR schema with Patient, Encounter, MedicalNote, NoteSignature, and AuditEvent.
Patient master record
Store demographic details, medical record numbers, date of birth, contact data, and core chart metadata for each patient.
Encounter-based chart organization
Represent visits, admissions, consultations, or follow-ups with timestamps, care context, status, and responsible clinician pointers.
Versioned medical notes
MedicalNote stores note type, content, revision number, status, amendment metadata, and linkage to patient and encounter.
Multi-signature approval workflow
NoteSignature objects track who must sign, in what role, current status, signed timestamps, and optional comments.
Access and change audit events
AuditEvent records important reads, writes, status changes, and signature actions with actor, target, and timestamp data.
Why Build Your Electronic Health Record (EHR) App Backend with Back4app?
Back4app gives you a managed backend contract for healthcare documentation flows so your team can focus on clinician experience, chart usability, and domain logic instead of infrastructure plumbing.
- •Clinical data building blocks: Predefined classes for patient records, encounters, note versions, and signatures let you implement essential EHR flows without designing the entire backend from zero.
- •Revision and approval traceability: Versioned note records plus explicit signature objects make it easier to represent draft, review, amendment, and sign-off states clearly.
- •Flexible APIs for apps and integrations: Use Live Queries for chart updates while exposing REST and GraphQL endpoints for portals, mobile charting, analytics, and external clinical integrations.
Standardize patient charting across teams and platforms with one backend contract and reduce the time required to ship secure documentation workflows.
Core Benefits
A healthcare documentation backend that helps you move faster while preserving version history and approval traceability.
Faster charting product delivery
Start from a pre-built patient-and-note model so your team can focus on workflows like chart review, documentation, and approval screens.
Clear revision history
Keep explicit note versions and amendment lineage so teams can understand what changed, when it changed, and which version is authoritative.
Signature workflow support
Represent reviewer queues, required signers, co-sign deadlines, and completion states without inventing a separate workflow engine first.
Role-aware access patterns
Apply role and ownership rules so only authorized clinicians or admins can create, edit, sign, or view sensitive chart content.
Real-time chart responsiveness
Live Queries can notify clients when an encounter is updated, a note is amended, or a required signature is completed.
Extensible for integrations
Connect to scheduling tools, patient portals, billing systems, or interoperability layers using REST or GraphQL APIs.
Ready to launch a modern EHR workflow?
Let the Back4app AI Agent scaffold the EHR backend and seed sample patients, clinical encounters, note versions, and audit events from one prompt.
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Technical Stack
Everything included in this EHR backend template.
ER Diagram
Entity relationship model for the EHR schema.
Schema covering patients, encounters, note revisions, signatures, and audit events.
View diagram source
erDiagram
User ||--o{ Patient : "primary_clinician_for"
Patient ||--o{ Encounter : "has"
Patient ||--o{ MedicalNote : "chart_contains"
Encounter ||--o{ MedicalNote : "context_for"
MedicalNote ||--o{ NoteVersion : "versioned_as"
MedicalNote ||--o{ Signature : "requires"
NoteVersion ||--o{ Signature : "attests"
Patient ||--o{ Attachment : "owns"
Encounter ||--o{ Attachment : "context_for"
MedicalNote ||--o{ Attachment : "references"
User ||--o{ MedicalNote : "authors"
User ||--o{ NoteVersion : "edits"
User ||--o{ Signature : "signs"
User ||--o{ AuditEvent : "actor_of"
Patient ||--o{ AuditEvent : "chart_activity"
Patient {
String objectId PK
String mrn
String fullName
Date dateOfBirth
String sexAtBirth
Array allergies
Pointer primaryClinician FK
String status
Date createdAt
Date updatedAt
}
Encounter {
String objectId PK
Pointer patient FK
String encounterNumber
String type
String department
Pointer admittingClinician FK
Date startedAt
Date endedAt
String status
Date createdAt
Date updatedAt
}
MedicalNote {
String objectId PK
Pointer patient FK
Pointer encounter FK
Pointer author FK
String title
String noteType
Number currentVersionNumber
String status
Boolean requiresCosign
Date createdAt
Date updatedAt
}
NoteVersion {
String objectId PK
Pointer medicalNote FK
Number versionNumber
Pointer editor FK
String subjective
String objective
String assessment
String plan
String changeSummary
Boolean isAddendum
Date createdAt
Date updatedAt
}
Signature {
String objectId PK
Pointer medicalNote FK
Pointer noteVersion FK
Pointer signer FK
String signatureRole
String status
Date signedAt
String comment
Date createdAt
Date updatedAt
}
Attachment {
String objectId PK
Pointer patient FK
Pointer encounter FK
Pointer medicalNote FK
File file
String category
Pointer uploadedBy FK
Date createdAt
Date updatedAt
}
AuditEvent {
String objectId PK
Pointer actor FK
Pointer patient FK
String eventType
String targetClass
String targetId
String details
String ipAddress
Date timestamp
}
Integration Flow
Auth-to-CRUD flow for patient chart access, encounter documentation, versioned note updates, and signature workflow.
View diagram source
sequenceDiagram
participant User as Clinician
participant App as Electronic Health Record (EHR) App
participant Back4app as Back4app Cloud
User->>App: Sign in to access patient chart
App->>Back4app: POST /login (username, password)
Back4app-->>App: Session token + user role
User->>App: Open patient timeline
App->>Back4app: GET /classes/Patient + /classes/Encounter + /classes/MedicalNote
Back4app-->>App: Patient chart, active encounters, note list
User->>App: Create amended progress note
App->>Back4app: POST /classes/MedicalNote (patient, encounter, author, status)
Back4app-->>App: MedicalNote objectId
App->>Back4app: POST /classes/NoteVersion (medicalNote, versionNumber, SOAP content)
Back4app-->>App: NoteVersion saved
User->>App: Request attending co-signature
App->>Back4app: POST /classes/Signature (medicalNote, noteVersion, signer, role)
Back4app-->>App: Signature request created
App->>Back4app: POST /classes/AuditEvent (eventType: sign_request, targetClass: MedicalNote)
Back4app-->>App: Audit event saved
Back4app-->>App: Live Query events (new versions, signature status changes)
App-->>User: Real-time chart refresh and signer updatesData Dictionary
Full field-level reference for every class in the EHR schema.
| Field | Type | Description | Required |
|---|---|---|---|
| objectId | String | Auto-generated unique identifier | Auto |
| username | String | Login username for clinicians, scribes, and administrators | |
| String | User email address | ||
| password | String | Hashed password (write-only) | |
| role | String | Role (admin, physician, nurse, scribe, auditor) | |
| displayName | String | Full display name used in signatures and chart headers | — |
| licenseNumber | String | Clinical license or credential identifier | — |
| createdAt | Date | Auto-generated creation timestamp | Auto |
| updatedAt | Date | Auto-generated last-update timestamp | Auto |
9 fields in User
Security and Permissions
How ACL, roles, and CLP strategy secure patient charts, note revisions, signatures, and audit events.
Role-based chart access
Use roles such as clinician, attending, reviewer, and admin to scope who can read patient records, author notes, request signatures, or manage access.
Ownership and signature responsibility
Restrict note edits to authorized authors or supervisors while allowing only designated signers to complete NoteSignature records assigned to them.
Protected audit trails
AuditEvent entries should be append-only and tightly controlled so chart access history and critical changes cannot be tampered with from client apps.
Schema (JSON)
Raw JSON schema definition ready to copy into Back4app or use as implementation reference.
{
"classes": [
{
"className": "User",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"username": {
"type": "String",
"required": true
},
"email": {
"type": "String",
"required": true
},
"password": {
"type": "String",
"required": true
},
"role": {
"type": "String",
"required": true
},
"displayName": {
"type": "String",
"required": false
},
"licenseNumber": {
"type": "String",
"required": false
},
"createdAt": {
"type": "Date",
"required": false
},
"updatedAt": {
"type": "Date",
"required": false
}
}
},
{
"className": "Patient",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"mrn": {
"type": "String",
"required": true
},
"fullName": {
"type": "String",
"required": true
},
"dateOfBirth": {
"type": "Date",
"required": true
},
"sexAtBirth": {
"type": "String",
"required": false
},
"allergies": {
"type": "Array",
"required": false
},
"primaryClinician": {
"type": "Pointer",
"required": false,
"targetClass": "User"
},
"status": {
"type": "String",
"required": true
},
"createdAt": {
"type": "Date",
"required": false
},
"updatedAt": {
"type": "Date",
"required": false
}
}
},
{
"className": "Encounter",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"patient": {
"type": "Pointer",
"required": true,
"targetClass": "Patient"
},
"encounterNumber": {
"type": "String",
"required": true
},
"type": {
"type": "String",
"required": true
},
"department": {
"type": "String",
"required": false
},
"admittingClinician": {
"type": "Pointer",
"required": false,
"targetClass": "User"
},
"startedAt": {
"type": "Date",
"required": true
},
"endedAt": {
"type": "Date",
"required": false
},
"status": {
"type": "String",
"required": true
},
"createdAt": {
"type": "Date",
"required": false
},
"updatedAt": {
"type": "Date",
"required": false
}
}
},
{
"className": "MedicalNote",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"patient": {
"type": "Pointer",
"required": true,
"targetClass": "Patient"
},
"encounter": {
"type": "Pointer",
"required": true,
"targetClass": "Encounter"
},
"author": {
"type": "Pointer",
"required": true,
"targetClass": "User"
},
"title": {
"type": "String",
"required": true
},
"noteType": {
"type": "String",
"required": true
},
"currentVersionNumber": {
"type": "Number",
"required": true
},
"status": {
"type": "String",
"required": true
},
"requiresCosign": {
"type": "Boolean",
"required": false
},
"createdAt": {
"type": "Date",
"required": false
},
"updatedAt": {
"type": "Date",
"required": false
}
}
},
{
"className": "NoteVersion",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"medicalNote": {
"type": "Pointer",
"required": true,
"targetClass": "MedicalNote"
},
"versionNumber": {
"type": "Number",
"required": true
},
"editor": {
"type": "Pointer",
"required": true,
"targetClass": "User"
},
"subjective": {
"type": "String",
"required": false
},
"objective": {
"type": "String",
"required": false
},
"assessment": {
"type": "String",
"required": false
},
"plan": {
"type": "String",
"required": false
},
"changeSummary": {
"type": "String",
"required": false
},
"isAddendum": {
"type": "Boolean",
"required": false
},
"createdAt": {
"type": "Date",
"required": false
},
"updatedAt": {
"type": "Date",
"required": false
}
}
},
{
"className": "Signature",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"medicalNote": {
"type": "Pointer",
"required": true,
"targetClass": "MedicalNote"
},
"noteVersion": {
"type": "Pointer",
"required": true,
"targetClass": "NoteVersion"
},
"signer": {
"type": "Pointer",
"required": true,
"targetClass": "User"
},
"signatureRole": {
"type": "String",
"required": true
},
"status": {
"type": "String",
"required": true
},
"signedAt": {
"type": "Date",
"required": false
},
"comment": {
"type": "String",
"required": false
},
"createdAt": {
"type": "Date",
"required": false
},
"updatedAt": {
"type": "Date",
"required": false
}
}
},
{
"className": "Attachment",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"patient": {
"type": "Pointer",
"required": true,
"targetClass": "Patient"
},
"encounter": {
"type": "Pointer",
"required": false,
"targetClass": "Encounter"
},
"medicalNote": {
"type": "Pointer",
"required": false,
"targetClass": "MedicalNote"
},
"file": {
"type": "File",
"required": true
},
"category": {
"type": "String",
"required": true
},
"uploadedBy": {
"type": "Pointer",
"required": true,
"targetClass": "User"
},
"createdAt": {
"type": "Date",
"required": false
},
"updatedAt": {
"type": "Date",
"required": false
}
}
},
{
"className": "AuditEvent",
"fields": {
"objectId": {
"type": "String",
"required": false
},
"actor": {
"type": "Pointer",
"required": true,
"targetClass": "User"
},
"patient": {
"type": "Pointer",
"required": false,
"targetClass": "Patient"
},
"eventType": {
"type": "String",
"required": true
},
"targetClass": {
"type": "String",
"required": false
},
"targetId": {
"type": "String",
"required": false
},
"details": {
"type": "String",
"required": false
},
"ipAddress": {
"type": "String",
"required": false
},
"timestamp": {
"type": "Date",
"required": true
}
}
}
]
}Build with AI Agent
Use the Back4app AI Agent to generate a full EHR app from this template, including frontend, backend, auth, note revision workflows, and signature flows.
Create an Electronic Health Record (EHR) backend on Back4app with this exact schema and behavior. Schema: 1. Patient: medicalRecordNumber (String, required), fullName (String, required), dateOfBirth (Date), sexAtBirth (String), contact (JSON), primaryClinician (Pointer to User, optional), status (String: active, inactive, archived), objectId, createdAt, updatedAt. 2. Encounter: patient (Pointer to Patient, required), encounterType (String: outpatient, inpatient, emergency, telehealth), startedAt (Date, required), endedAt (Date, optional), location (String), attendingClinician (Pointer to User), status (String: open, closed, cancelled), objectId, createdAt, updatedAt. 3. MedicalNote: patient (Pointer to Patient, required), encounter (Pointer to Encounter, optional), author (Pointer to User, required), noteType (String: progress, admission, discharge, consult, procedure), title (String), content (String, required), versionNumber (Number, required), previousVersion (Pointer to MedicalNote, optional), status (String: draft, under_review, signed, amended), amendmentReason (String, optional), objectId, createdAt, updatedAt. 4. NoteSignature: note (Pointer to MedicalNote, required), signer (Pointer to User, required), signerRole (String), status (String: requested, signed, declined), requestedAt (Date), signedAt (Date, optional), comment (String, optional), objectId, createdAt, updatedAt. 5. AuditEvent: actor (Pointer to User), eventType (String), targetClass (String), targetId (String), details (JSON), timestamp (Date) — append-only. Security: - Role-based CLP and ACL: only authenticated care-team users can access Patient and Encounter data. Only note authors or supervising roles can edit a MedicalNote draft. Only assigned signers can complete NoteSignature actions. AuditEvent is append-only and read-restricted. Auth: - Clinicians sign up and log in via built-in User; roles assigned by administrators. Behavior: - Authenticate user, fetch a patient chart, create or amend a MedicalNote, request one or more NoteSignature approvals, and write an AuditEvent entry for each critical operation. Deliver: - Back4app app with schema, ACLs, CLPs, Cloud Code validations, seeded sample data, and a frontend scaffold per chosen technology.
Press the button below to open the Agent with this template prompt pre-filled.
This base prompt describes the EHR schema and behaviors; you can select tech-specific suffixes afterward.
API Playground
Try REST and GraphQL endpoints against the EHR schema. Responses use mock data and do not require a Back4app account.
Uses the same schema as this template.
Choose Your Technology
Expand each card for integration steps, state patterns, data model examples, and offline notes.
Flutter EHR Backend
React EHR Backend
React Native EHR Backend
Next.js EHR Backend
JavaScript EHR Backend
Android EHR Backend
iOS EHR Backend
Vue EHR Backend
Angular EHR Backend
GraphQL EHR Backend
REST API EHR Backend
PHP EHR Backend
.NET EHR Backend
What You Get with Every Technology
Every stack uses the same EHR backend schema and API contracts.
Comprehensive patient records
Manage complete patient histories for ehr system with ease.
Secure data storage
Ensure patient confidentiality with robust ehr system data protection.
Audit trail for compliance
Maintain an accurate log of all ehr system interactions for regulatory adherence.
REST/GraphQL APIs
Access and manipulate ehr system data seamlessly with modern APIs.
Version control for notes
Track changes in ehr system documentation with efficient note versioning.
Customizable workflows
Adapt processes to fit unique ehr system needs with flexible backend solutions.
Ehr System Framework Comparison
Compare setup speed, SDK style, and AI support across all supported technologies.
| Framework | Setup Time | Ehr System Benefit | SDK Type | AI Support |
|---|---|---|---|---|
| Rapid (5 min) setup | Single codebase for ehr system on mobile and web. | Typed SDK | Full | |
| ~5 min | Fast web dashboard for ehr system. | Typed SDK | Full | |
| About 5 min | Cross-platform mobile app for ehr system. | Typed SDK | Full | |
| Under 5 minutes | Server-rendered web app for ehr system. | Typed SDK | Full | |
| Under 5 min | Lightweight web integration for ehr system. | Typed SDK | Full | |
| Rapid (5 min) setup | Native Android app for ehr system. | Typed SDK | Full | |
| ~5 min | Native iOS app for ehr system. | Typed SDK | Full | |
| About 5 min | Reactive web UI for ehr system. | Typed SDK | Full | |
| Under 5 minutes | Enterprise web app for ehr system. | Typed SDK | Full | |
| ~2 min | Flexible GraphQL API for ehr system. | GraphQL API | Full | |
| Under 2 min | REST API integration for ehr system. | REST API | Full | |
| ~3–5 min | Server-side PHP backend for ehr system. | REST API | Full | |
| About 5 min | .NET backend for ehr system. | Typed SDK | Full |
Setup time reflects expected duration from project bootstrap to first patient chart view populated with encounters and note summaries.
Frequently Asked Questions
Common questions about building an EHR backend with this template.
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