What is OSCAR EMR?

The short answer

OSCAR stands for Open Source Clinical Application and Resource. It was built at McMaster University as a web-based EMR for academic primary care clinics, and it is released under the GPL v2, which is why anyone can host and sell a version of it.

OSCAR has held OntarioMD certification continuously since December 2005 and carries ISO 13485 and ISO/IEC 27001. As of 2016 it accounted for roughly a fifth of the certified clinical management system market in Canada, and for a long stretch it was the only open-source system on the certified list.

Why there are so many OSCARs

Because the licence permits it, OSCAR is supported commercially by vendors known as OSCAR Service Providers, or OSPs. An OSP hosts the software, supports it, trains your staff, and bills you monthly. Most clinics do not run OSCAR themselves; they run an OSP’s version of it.

That explains the naming. Juno, OSCAR Pro, and Avaros are different vendors’ treatments of a shared foundation, each with its own hosting, interface, pricing, and support desk, rather than rival products built from scratch.

When a vendor tells you they integrate with OSCAR, the useful question is which of these they mean, and how deeply.

The variants

OSCAR McMaster is the upstream project, the original academic release everything else descends from.

OSCAR Pro is the one most OSCAR clinics are on. WELL Health runs it, more than 10,700 physicians across roughly 2,200 clinics use it, and it grew by absorbing most of the independent OSPs that came before it. Start here if you are not sure which variant you have.

Juno EMR is a cloud-hosted branch built around hosting, stability, and third-party integrations, also within WELL Health.

Avaros is an OSCAR-derived hosted EMR with a newer interface, its own login, and its own provider support.

Open OSP is a member-owned cooperative offering hosted and on-site options, including migration from other EMRs. Its name comes from the OSP model above.

Self-hosted OSCAR still exists, run by clinics with their own infrastructure and appetite for maintaining it.

They differ in hosting, price, interface polish, and who picks up the phone. How the chart itself is built is the same across all of them, and that is the part that decides your workload.

What every OSCAR shares

The encounter note is a single free-text progress note in one box. There are no separate Subjective, Objective, Assessment, and Plan fields to fill, which keeps writing the note quick.

The structured record sits apart from the note, in the Cumulative Patient Profile. The CPP holds what is true about the patient rather than what happened today, across six sections: Ongoing Concerns, Medical History, Social History, Family History, Reminders, and Risk Factors. Each section is maintained by hand, one entry at a time. You find the section, add the entry, fill the overlay, place it in the list, save, and repeat.

Writing the note takes a minute. Keeping the CPP current across a full clinic day is the work that gets postponed, which is why problem lists drift and the next clinician inherits a record that is behind.

Meet and greets go from forty minutes to fifteen

The first visit with a new patient is the worst case. A meet and greet is one long history-taking session, and nearly everything the patient tells you is CPP material rather than note material: past surgeries, chronic conditions, current medications, allergies, family history, social history, risk factors.

So the encounter runs long twice. Once while you take the history, and again afterward while you retype it into six sections.

If you already run an AI scribe, this is the part it hands back to you. It writes the note, which was never the slow half, and the CPP is still yours to fill.

Medulla turns that forty minute meet and greet into a fifteen minute one. The visit does not change. Medulla proposes the CPP entries from what was said, grouped by section, and the ones you accept go into the chart together instead of one overlay at a time.

A routine follow-up saves you a few minutes. A meet and greet saves you the hour after clinic.

It also changes what your practice can take on. A panel grows through meet and greets, so when each one costs forty minutes of typing, accepting new patients means giving up evenings. At fifteen minutes it becomes a question of how many slots you have.

Where Medulla fits

Medulla runs inside the encounter you already have open, on Med Access and Oscar-based EMRs including Juno, Oscar Pro, Oscar 19, Open OSP, and Avaros. No separate tab, and no copy and paste between a scribe and your chart.

It reads the visit and the chart together, then proposes the updates the visit calls for: new diagnoses, medication changes, care plan items, follow-ups. Each is a checkbox you accept or discard, and the accepted ones go into the chart in one click. Nothing reaches the record on its own.

Because Medulla reads the chart as well as writing to it, billing and diagnostic code suggestions come from what is in the record rather than from the conversation alone.

See it on your own charts. The trial is free for a month with no credit card required.