Ontario has some of the most advanced hospitals, physicians, nurses, laboratories and medical technology in Canada.
Yet a surprisingly basic problem still follows patients around the province:
Their complete medical record often does not.
A patient can visit a family doctor, an emergency department, a specialist, a walk-in clinic, a pharmacy and another hospital, and each provider may be looking at a different piece of that person’s medical history.
Some laboratory information may be available electronically. Hospital reports may appear in another system. Prescription information may be available through a provincial repository. The family doctor’s notes may remain inside the doctor’s own electronic medical record system.
And sometimes the patient is still asked:
“What medications are you taking?”
“When did you have that surgery?”
“What did the specialist tell you?”
“Have you had this test before?”
In a publicly funded health-care system serving roughly 16 million Ontarians, it raises an obvious question:
Why doesn’t Ontario simply have one integrated electronic medical record that follows the patient throughout the health-care system?
The surprising answer is that Ontario already has many of the pieces required to build such a system.
What it has historically lacked is a single, universal clinical record used seamlessly across the entire health-care system.
And Ontario itself now appears to recognize that this needs to change.
First, There Is an Important Difference Between an EMR and an EHR
The terminology can be confusing.
An Electronic Medical Record (EMR) is generally the clinical chart used within a physician’s office or health-care organization.
It might contain:
- medical history
- physician notes
- diagnoses
- prescriptions
- allergies
- laboratory results
- referrals
- immunizations
- screening information
- chronic disease information
OntarioMD describes an EMR as the secure software and database physicians use to capture patient information.
An Electronic Health Record (EHR) is broader.
It attempts to bring health information from multiple sources together so authorized health professionals can see relevant information about a patient.
Ontario actually has a provincial EHR infrastructure.
The problem is that it isn’t the same thing as every physician, hospital, specialist, pharmacist and other authorized health professional working from one continuously updated patient chart.
Ontario Already Has a Large Electronic Health Information Network
It would be incorrect to say Ontario has no electronic health record system.
It has several major provincial repositories containing different categories of patient information.
Among them are:
Ontario Laboratories Information System — OLIS
OLIS provides access to laboratory information.
Authorized health-care providers can electronically retrieve laboratory information through connected systems.
Digital Health Drug Repository — DHDR
The Digital Health Drug Repository contains medication and pharmacy-service information.
Ontario Health describes it as a key component of Ontario’s provincial electronic health record.
Diagnostic Imaging Common Service
This provides access to information related to diagnostic imaging such as:
- X-rays
- CT scans
- MRIs
- ultrasounds
- other diagnostic imaging
Acute and Community Clinical Data Repository
This repository can contain information including:
- emergency department reports
- hospital discharge summaries
- consultation reports
- hospital encounters
- home and community-care information
- diagnostic information
Ontario Health says the repository is intended to provide health-care teams with access to integrated clinical information and reduce unnecessary duplicate testing.
These are significant systems.
But they illustrate the underlying problem.
Ontario hasn’t historically had one medical record.
It has had numerous systems that exchange portions of medical information.
Ontario Even Has Multiple Provincial Clinical Viewers
The fragmentation becomes particularly obvious when looking at how clinicians access provincial information.
Ontario currently has three major clinical viewers:
- ConnectingOntario ClinicalViewer
- ClinicalConnect
- electronic Child Health Network
Ontario Health itself acknowledges that these systems differ in both their data and user experience.
Which viewer a health professional uses can depend partly on where they work.
ConnectingOntario primarily serves Ontario Health’s Central, Toronto, East and North regions.
ClinicalConnect primarily serves Ontario Health West.
The electronic Child Health Network primarily serves pediatric health professionals.
Ontario Health is therefore working on consolidating these systems into one provincial clinical viewer.
Its stated goal is a single point of access to province-wide patient information.
That tells us something important:
Ontario knows the current system is fragmented.
The Bigger Problem Is at the Doctor’s Office
Hospitals aren’t the only issue.
Thousands of primary-care physicians operate their own electronic medical record systems.
OntarioMD maintains a list of certified EMR products used in the province.
As of August 2026, that list included systems such as:
- Accuro EMR
- Avaros
- Collaborative Health Record
- EMR Advantage
- GlobeMed
- Juno
- Med Access
- MYLE
- OSCAR Pro
- PS Suite
- several others
These systems may all meet Ontario certification requirements.
But they are still different products operated by different vendors.
That means Ontario’s health system developed somewhat like having a province where everybody has email—but some email systems cannot easily exchange all types of information with one another.
OntarioMD says more than 20,000 clinicians use an OntarioMD-certified EMR.
Many of those EMRs can connect to certain provincial services including laboratory information, reports and medication repositories.
However, the degree of integration varies between systems.
This is very different from having one continuously synchronized provincial patient record.
A Patient’s Medical Record Is Therefore Scattered Across the Health System
Imagine an Ontario resident named Sarah.
Her family doctor may have:
- her long-term medical history
- medication changes
- family history
- blood-pressure readings
- physician notes
- preventive screening records
Her cardiologist may maintain separate specialist notes.
Her local hospital may maintain:
- emergency visits
- admission records
- imaging
- surgery information
- discharge summaries
A laboratory contributes results to OLIS.
Her pharmacy contributes medication information to provincial drug systems.
Home care may generate another set of records.
A walk-in clinic might maintain another chart.
Technically, many of these systems can exchange certain pieces of information.
But nobody necessarily owns a single master clinical record containing everything in a structured, easily accessible timeline.
That distinction matters.
Why Does This Matter?
Medical information isn’t simply paperwork.
It can directly affect clinical decisions.
Consider someone arriving unconscious at an emergency department while travelling elsewhere in Ontario.
Ideally the physician should immediately be able to see:
Current medications
including when they were last dispensed.
Medication allergies
including the severity of previous reactions.
Major diagnoses
such as diabetes, heart disease, epilepsy or kidney disease.
Previous surgeries
including relevant operative reports.
Recent laboratory results
so doctors can determine whether something has changed.
Recent diagnostic imaging
to avoid repeating scans unnecessarily.
Specialist reports
showing what another doctor has already investigated.
Hospital admissions
including why they occurred and what treatment was provided.
Immunization history
where clinically relevant.
Advance-care information
where applicable.
Ideally, all of this should appear almost immediately after the patient is identified.
The technology to accomplish much of this already exists.
So Why Hasn’t Ontario Done It?
There isn’t one single reason.
The current situation developed over decades.
1. Health Care Was Digitized Organization by Organization
Ontario did not originally create one provincial electronic medical record and then require everyone to use it.
Hospitals purchased hospital information systems.
Doctors purchased physician EMRs.
Laboratories developed laboratory systems.
Pharmacies developed pharmacy systems.
Home-care organizations used other systems.
Specialty clinics developed still more systems.
Each organization solved its own immediate problem.
Over time Ontario attempted to connect them.
That is much harder than designing an integrated system from the beginning.
2. Ontario Has Many EMR Vendors
Competition between software vendors can be beneficial.
Different medical practices have different requirements.
A pediatrician doesn’t necessarily need exactly the same workflow as a cardiologist or family doctor.
But there is a difference between allowing different software interfaces and allowing incompatible medical-data structures.
This is where health-care interoperability becomes essential.
Different medical programs should be able to communicate using common standards.
Think of banking.
TD, RBC, Scotiabank, CIBC and BMO all use different internal computer systems.
Yet Canadians can transfer money between banks because common financial networks and standards exist.
Health information should increasingly work the same way.
The software does not necessarily need to be identical.
The information needs to be interoperable.
3. Medical Records Are Extremely Sensitive
There is another reason governments move cautiously.
Health information is among the most sensitive information government or private organizations can hold.
Ontario’s Personal Health Information Protection Act — PHIPA regulates how personal health information can be collected, used and disclosed.
A province-wide system would require extremely strong controls surrounding:
- authentication
- authorization
- encryption
- audit logs
- patient consent
- data retention
- cybersecurity
- emergency access
- inappropriate employee access
A hospital receptionist should not automatically have the same access as an emergency physician.
A dermatologist does not necessarily need access to every piece of psychiatric information.
A pharmacist does not require every hospital progress note.
Good health-information systems therefore use role-based access controls.
That means users receive access to the information appropriate for their role.
Every access should also be logged.
If someone improperly opens a patient’s medical record, the system should identify:
- who accessed it
- when
- where
- what information they viewed
Privacy is therefore a legitimate concern.
But privacy should not be confused with an argument against interoperability.
Secure information sharing and privacy can coexist.
Banks demonstrate this every day with financial information.
4. Cybersecurity Has Become a Major Concern
A centralized health-information system would be an attractive target for cybercriminals.
Ontario hospitals and health-care organizations have already experienced serious ransomware and cybersecurity incidents.
A compromised provincial system could potentially expose enormous amounts of personal information.
That means a modern provincial health-information architecture would require:
- strong encryption
- multi-factor authentication
- network segmentation
- redundant infrastructure
- offline recovery systems
- continuous security monitoring
- immutable backups
- disaster recovery
- intrusion detection
- strict vendor-security requirements
But again, fragmentation is not automatically safer.
Thousands of independently operated systems can also create thousands of potential vulnerabilities.
A province-wide architecture can potentially provide stronger security standards if properly designed.
5. Replacing Existing Systems Is Expensive and Disruptive
Ontario cannot simply turn off thousands of existing systems on Friday evening and launch a new provincial system Monday morning.
Existing medical records contain decades of information.
Those records would have to be:
- extracted
- standardized
- cleaned
- matched to the correct patient
- imported
- verified
- preserved
Clinicians would need training.
Hospitals would require interfaces.
Pharmacies would need integration.
Laboratories would need integration.
Medical-device systems would need integration.
Billing systems would need integration.
And patient care would have to continue throughout the transition.
It would be one of the largest information-technology projects the Ontario government could undertake.
6. Health Care Is Institutionally Fragmented
Ontario’s health-care system isn’t actually one organization.
It contains:
- hospitals
- family-health organizations
- independent physician practices
- pharmacies
- laboratories
- long-term-care homes
- home-care organizations
- public-health units
- private clinics
- community health centres
- mental-health organizations
- specialist clinics
- rehabilitation facilities
They operate under different governance structures and funding arrangements.
Creating one information environment requires getting all of them to follow common standards.
That is partly a technology problem.
But it is also a governance problem.
Ontario Is Finally Moving Toward Something Much Closer to This
This is where the story becomes particularly interesting.
In March 2026, Ontario announced plans to advance a province-wide electronic medical record system for primary care.
The province calls it the:
Primary Care Medical Record System
Ontario explicitly says the system is intended to replace thousands of isolated chart systems with an interoperable and secure platform.
According to the Ontario government, the system is intended to provide:
- better integration across the health system
- improved interoperability
- better health-system data
- population-health management
- province-wide digital tools
- improved cybersecurity
The province has begun moving toward procurement of the system.
That is potentially one of the largest changes to Ontario medical information technology in decades.
Ontario Is Also Standardizing How Health Systems Communicate
Another important development is happening quietly in the technical background.
Ontario Health is creating provincial interoperability standards based increasingly on modern health-information standards including HL7 FHIR.
FHIR stands for:
Fast Healthcare Interoperability Resources.
It is an international standard for exchanging health information electronically.
Instead of requiring every health organization to use identical software, FHIR allows different systems to exchange standardized information.
Ontario now has FHIR implementation standards covering areas including:
- patient identification
- laboratory information
- medications
- clinical reports
- referrals
- assessments
- patient summaries
- health-service providers
Ontario Health approved a provincial Clinical Report Exchange FHIR standard in March 2026.
It has also established standards for electronic notifications when information changes inside provincial repositories.
Those developments may sound highly technical.
But they are exactly the infrastructure needed to build a health system where information follows the patient.
Historically much of Ontario’s health-information integration developed voluntarily or through individual projects.
That is beginning to change.
Ontario’s Digital Health Information Exchange framework allows Ontario Health to establish mandatory interoperability requirements.
Changes that took effect January 1, 2025, require certain community pharmacies and Integrated Community Health Service Centres to contribute specified personal health information to Ontario’s provincial electronic health record according to provincial interoperability requirements.
Ontario Health is also introducing new contribution standards for hospital and community clinical information.
Some current standards approved in 2026 have compliance deadlines extending to December 31, 2029.
That date demonstrates an important reality.
Ontario’s integrated digital-health system isn’t being constructed overnight.
It is being built incrementally.
What Ontario Should Ultimately Create
Ontario doesn’t necessarily need every medical professional using the exact same software screen.
What Ontario needs is something more important:
Every authorized medical professional should be able to retrieve the clinically relevant information they are permitted to access.
The patient’s health card number—or another secure provincial identifier—could act as part of the mechanism that links information together.
The system could present a standardized summary containing:
Patient identity
- name
- date of birth
- health card information
- contact information
- emergency contact
Medical conditions
A continuously updated problem list showing active and historical diagnoses.
Allergies
Medication, food and other clinically significant allergies.
Medication record
Prescribed medications, dispensing history and medication changes.
Laboratory results
A longitudinal history allowing clinicians to see changes over time.
Diagnostic imaging
Reports and links to previous imaging.
Hospital history
Admissions, emergency visits, procedures and discharge summaries.
Surgery history
Major procedures and operative information.
Specialist consultations
Reports from cardiology, oncology, neurology and other specialties.
Immunizations
A verified provincial vaccination history.
Primary-care notes
Relevant portions of the family physician record.
Care plans
Particularly for chronic disease, complex-care and home-care patients.
Imagine the Difference in an Emergency Department
A patient arrives in Windsor.
They normally live in Thunder Bay.
Instead of relying primarily on the patient remembering their medical history, the emergency physician securely opens a provincial health record.
Within seconds the physician sees:
Allergies
Penicillin — severe reaction.
Current medications
Including doses and recent dispensing history.
Major conditions
Atrial fibrillation, diabetes and chronic kidney disease.
Recent blood tests
Including kidney function from two weeks earlier.
Recent CT scan
Performed at another Ontario hospital three months earlier.
Cardiology consultation
Including treatment recommendations.
Previous hospitalization
Including the discharge summary.
The physician now has considerably more information before ordering treatment.
That could prevent medication errors.
It could prevent unnecessary testing.
It could save time.
And in some circumstances, it could save a life.
Patients Should Also Be Able to See Their Own Record
A truly modern health-information system should not only serve doctors.
Patients should have access too.
Ontario currently has multiple patient portals operated by different hospitals and health organizations.
Ontario Health has developed standards for patient portals, but Ontario still does not have one universal patient experience containing every piece of provincial health information.
A mature system could allow Ontarians to securely view:
- laboratory results
- medications
- vaccination records
- hospital reports
- imaging reports
- specialist consultations
- upcoming appointments
- referrals
- discharge instructions
Patients could also see who accessed their medical record.
That would improve transparency and potentially strengthen confidence in the system.
The Patient Should Be at the Centre of the Record
Historically health-care records have often followed organizations.
The hospital owns its chart.
The family doctor’s office maintains another chart.
The specialist maintains another.
The laboratory maintains its results.
The pharmacy maintains dispensing information.
From the patient’s perspective, however, those are not separate medical lives.
They are one medical history.
A modern health-information system should therefore be organized around the patient rather than around the institution providing the care.
Could Artificial Intelligence Eventually Help?
Possibly—but only after the information problem is solved.
An integrated provincial record could eventually allow clinical software to identify important patterns such as:
- dangerous medication interactions
- duplicated prescriptions
- overdue cancer screening
- worsening kidney function
- rapidly changing laboratory results
- repeated emergency visits
- missing follow-up appointments
But AI should assist clinicians, not replace them.
And sophisticated AI is of limited use when important patient information remains scattered between incompatible databases.
Good artificial intelligence depends on good information.
The Most Important Principle: Enter Information Once, Use It Wherever Care Is Delivered
Ontario’s long-term goal should be simple.
Information should follow the patient.
If a physician records a serious medication allergy in Ottawa, an emergency physician in London should not need the patient to remember it.
If an MRI was performed in Toronto, a specialist in Sudbury should know it exists.
If a pharmacist dispensed a medication yesterday, an emergency physician treating the patient tonight should be able to see it where clinically appropriate.
If a specialist changes medication, the family physician should not have to wait for a fax.
And patients should not repeatedly become the courier carrying medical information between different parts of the health-care system.
Ontario Has Spent Decades Building the Pieces
Ontario already has:
- provincial laboratory databases
- diagnostic-imaging infrastructure
- medication repositories
- hospital clinical repositories
- provincial patient registries
- certified physician EMRs
- clinical viewers
- digital identity infrastructure
- interoperability standards
The missing piece has historically been making all of those systems behave like one coherent health-information environment.
Ontario Health’s current consolidation of clinical viewers, expanding interoperability requirements and the province’s proposed Primary Care Medical Record System indicate Ontario is moving closer to that goal.
But it is a transformation that arguably should have happened much earlier.
The Technology Is No Longer the Main Barrier
There was a time when connecting millions of medical records across an entire province was an enormous technical challenge.
Today many of the technologies required already exist.
Secure cloud infrastructure exists.
Standardized health-data protocols exist.
Digital identity systems exist.
Encryption exists.
Role-based access exists.
Audit logging exists.
International interoperability standards such as FHIR exist.
Ontario itself has begun implementing those standards.
The remaining challenge is largely one of implementation, governance, procurement, cybersecurity, funding and political commitment.
The Question Ontario Should Be Asking
Perhaps the question is no longer:
“Could Ontario create an integrated provincial health record?”
Clearly it could.
The better questions are:
How quickly can Ontario finish building one?
How interoperable will the new Primary Care Medical Record System actually be?
Will hospitals, specialists, laboratories, pharmacies, home care and primary care ultimately connect to the same patient-centred information architecture?
Will patients have access to the same core information?
And perhaps most importantly:
Will Ontario finally reach the point where a patient’s medical history follows the patient instead of remaining scattered throughout the health-care system?
Because in an emergency, the location of a person’s medical information should not depend on which doctor’s office, hospital, laboratory or computer system happens to have it.
A health-care system can only be truly connected when its information is connected too.
Sources and Further Reading
- Ontario Health — Clinical Viewer Consolidation
Explains Ontario’s work to consolidate ConnectingOntario ClinicalViewer, ClinicalConnect and the electronic Child Health Network into a single provincial clinical viewer. - Ontario Health — Digital Standards in Health Care
Ontario Health’s overview of provincial standards for digital health information exchange, connectivity, patient portals and interoperability. - Ontario Health — Data Standards
Covers Ontario’s technical standards for exchanging patient information consistently between different health-care systems. - Ontario Health — Acute and Community Clinical Data Repository Input Standard
Explains how hospitals and other health-service providers contribute patient information to Ontario’s provincial clinical data repository. The current standard has a compliance date of December 31, 2029. - Ontario Health — Patient Portal Standards
Describes provincial standards intended to give patients secure online access to their own health information. - OntarioMD — Certified EMR Offerings
Lists the electronic medical record products currently certified for use in Ontario. - OntarioMD — Integrated EHR Products and EMR Services
Shows which provincial services—including OLIS, the Digital Health Drug Repository, eConsult and ClinicalConnect—are integrated with individual Ontario EMR products. OntarioMD says more than 20,000 clinicians use an OntarioMD-certified EMR. - OntarioMD — Digital Health Tools
Describes access to OLIS laboratory results, hospital reports, medication information and other provincial digital-health services through physician EMRs. - OntarioMD — Provincial EMR-Integrated Access Statistics
Provides current statistics showing how many clinicians use individual provincial EHR services through Ontario-certified EMRs. - Government of Ontario — Ontario’s Primary Care Action Plan: Next Steps in Budget 2026
This is particularly important. Ontario explicitly says it is advancing a province-wide Primary Care Medical Record System intended to replace “thousands of isolated chart systems” with an interoperable and secure platform.
Primary Source Worth Highlighting
The most important source for this article is the Ontario government’s own description of the proposed Primary Care Medical Record System:
Read Ontario’s official Primary Care Action Plan
The province says the new system is intended to improve interoperability across the health-care system, connect clinicians with provincial digital tools, improve population-health management and provide stronger province-wide cybersecurity.
Editorial Note
This article describes Ontario’s health-information infrastructure and discusses potential public-policy improvements. Descriptions of existing provincial systems and programs are based primarily on Ontario Health, OntarioMD and Government of Ontario documentation current to September 2026. Recommendations and conclusions are analysis and should not be interpreted as medical advice.
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