How Long Diagnostic Test Results Take in Canada

How Long Diagnostic Test Results Take in Canada

Timelines vary according to the type of imaging, the clinical priority assigned by the hospital or imaging centre, and local appointment availability. The Ontario government notes that patients typically wait less than a week for their physician to receive or discuss diagnostic imaging results, although this reporting wait is not formally tracked.

X-Ray

Routine X-ray reports generally follow the same reporting window as other imaging exams, typically 2 to 3 business days from when the images are ready for review, using best efforts. Studies flagged as STAT are prioritized for review within 2 hours, and studies marked urgent are typically finalized within 24 hours, ahead of routine cases in the queue.

Ultrasound

For routine outpatient ultrasound, reports typically take 2 to 3 business days (up to 72 hours) to finalize from scan completion, using best efforts. Complex or multi-area studies requiring subspecialty review may take longer depending on radiologist availability. STAT studies are reviewed within 2 hours, and urgent studies within 24 hours. 

CT and MRI

Routine outpatient CT and MRI reports are typically targeted within 2 to 3 business days (up to 72 hours) at outpatient imaging centres, using best efforts. STAT cases are prioritized for review within 2 hours, and urgent cases within 24 hours. Hospital-based CT and MRI wait times in Ontario are tracked publicly. The Ontario government’s diagnostic imaging wait time data shows that priority levels 2 through 4 have defined target wait times from requisition receipt to scan completion, but the reporting window after the scan is separate from these access wait times.

Cardiology Tests

An ECG report is usually available within hours, as it requires a relatively brief review period. Echocardiogram and Holter monitor reports involve more detailed analysis and typically take 1 to 5 business days to reach the referring provider. Nuclear stress test reports, which require subspecialty nuclear cardiology review, may take longer depending on facility workflow and specialist availability.

Pulmonary Function Tests

A respiratory therapist or pulmonologist prepares spirometry and full pulmonary function test reports and is typically available within 1 to 3 business days of the appointment. The report is sent directly to your referring physician, who contacts you once they have reviewed the findings.

Factors That Affect Reporting Timelines

Several variables influence how long a diagnostic report takes to reach your physician after your appointment.

• Test complexity: Studies requiring subspecialty review, comparison with prior imaging, or multi-region analysis take longer than straightforward single-area exams.
• Urgency designation: STAT and urgent referrals are placed ahead of routine cases in the reading queue; correct priority designation at the time of requisition directly affects turnaround speed.
• Facility volume: Higher caseloads at busy imaging centres extend queue times for routine reads without affecting urgent case processing.
• Radiologist availability: Subspecialty or after-hours coverage gaps can extend turnaround for studies requiring specific expertise.
• Transmission method: Electronic transmission via PACS or eHealth Ontario’s clinical viewer delivers reports to physicians faster than fax or physical mail.
• Report complexity: Findings that require correlation with clinical history, prior studies, or specialist input extend the time to final sign-off.

How Results Are Sent to Physicians

Diagnostic imaging reports may also be delivered directly to a referring clinician’s electronic medical record through OntarioMD’s Health Report Manager. HRM securely delivers narrative diagnostic imaging reports, excluding images, from participating hospitals and specialty clinics, including independent facilities that provide X-ray, ultrasound, nuclear medicine and cardiology services. The referring clinician reviews the report and determines any required follow-up.

When Patients Receive Follow-Up

You receive follow-up from your physician, not from the imaging facility, once your doctor has reviewed the report. The time between report transmission and your physician contacting you depends on your doctor’s schedule, how the result was transmitted, and whether the finding is routine or requires urgent action. For routine outpatient results, most patients hear from their physician within a few days to a week of the test being completed.

In Ontario, patients can access their own diagnostic imaging reports and images directly through PocketHealth, a secure patient-facing platform. Once enrolled, you are notified the moment your report is uploaded, allowing you to view it before your physician’s office calls. The NCBI review on patient access to medical imaging results via portals notes that Ontario has established patient portal service standards requiring imaging reports to be accessible, though organizations may delay access for clinical or safety reasons.

Delays and Escalation Scenarios

Not all delays indicate a problem with care. High facility volume, holiday periods, and complex cases requiring additional specialist input all extend normal timelines without affecting the clinical quality of the result.

When to Follow Up

If you have not received contact from your physician within the expected window for your test type, typically 3 to 7 business days for routine outpatient imaging, contact your doctor’s office directly. Ask specifically about the status of the imaging report and whether it has been received. You can also contact the imaging facility to confirm the date the report was transmitted to your referring provider.

Urgent Findings

Radiologists are required to contact the referring provider directly by phone for findings that are clinically significant and require prompt action. These are called critical findings. If the imaging centre identifies such a finding after your appointment, your physician will be contacted immediately regardless of the normal reporting timeline. Your doctor then contacts you as quickly as possible to discuss next steps.

Technical Issues

Occasional transmission failures, report upload errors, or PACS system issues can delay a report from reaching your provider even after it has been finalized by the radiologist. If your physician’s office indicates they have not received a report you believe should already be complete, the imaging facility can resend it directly. This is uncommon but does occur, particularly when reports are transmitted to multiple provider addresses.

Frequently Asked Questions

Why haven’t I received my diagnostic results after a week?

A week without contact from your physician is within the normal range for many routine outpatient tests, particularly if the findings are unremarkable and your doctor reviews results on a scheduled basis. Contact your physician’s office directly to ask about the report status. If they have not received it, contact the imaging facility to confirm transmission.

Can I access my diagnostic results before my doctor calls me?

Yes, in Ontario. Well Diagnostics offers secure patient access to imaging reports and images through PocketHealth. Once enrolled, you receive a notification the moment your report is uploaded and can view it directly without waiting for a physician call. Accessing your results in advance does not replace your physician’s review and follow-up.

Do urgent diagnostic results get reported faster than routine ones?

Yes. Studies flagged as STAT are prioritized for review within 2 hours, and those marked urgent are typically completed within 24 hours, ahead of routine cases in the reporting queue. Critical findings, those requiring immediate clinical action, are communicated to the referring provider by phone at the time of identification, before the formal written report is finalized. Your physician is responsible for contacting you if a critical finding is reported.

Understanding Your Diagnostic Reporting Timeline

Diagnostic test result timelines reflect the steps required to produce an accurate, clinically useful report rather than administrative delays in most cases. Knowing the expected window for your test type helps you decide when to follow up and what to ask when you contact your physician’s office. If you want earlier access to your results, ask your imaging clinic about patient portal enrollment before your appointment.