Ontario high-school grades: does a sick absence require a medical note?

Attendance and participation now count toward final high-school grades in Ontario for the 2026-27 school year. That change has triggered a practical question: does one sick day now require a medical note? The provincial sources point to a more careful answer than a blanket yes or no.

An excused absence does not lower the attendance mark, and the provincial rules do not create a blanket medical-note requirement for every sick day. Report the reason and ask the school what evidence it requires. (Read more)

What actually changed in the final grade

Starting in 2026-27, attendance and participation make up 15% of the final grade in Grades 9 and 10 and 10% in Grades 11 and 12. The ministry says an excused absence does not negatively affect the mark and that illness or another unavoidable circumstance may be treated as excused. The measure is therefore not just a count of days: it combines attendance and participation under the provincial criteria. Sources: Government of Ontario.

Giving a reason is not always the same as providing a medical note

Ontario Regulation 298 says that after an absence, a parent — or the student if they are an adult — must give the reason orally or in writing as the principal requires. It also allows a principal to excuse a student temporarily on the written request of a parent or adult student. Those provisions do not say that every illness needs a medical note. A school or board may still have a process for classifying an absence or requesting documents in a particular situation. Source: Ontario Regulation 298.

Clarify the school’s rule first

Check in writing: is the absence currently recorded as excused or unexcused? Which school or board rule applies? Would a letter from the parent or adult student be enough? If medical evidence is required, which dates and minimum information must it cover? Keep the response, instructions and deadline. This clarification can prevent a clinical visit from starting without a precise administrative requirement.

What a clinician can — and cannot — document

The College of Nurses of Ontario documentation standard requires records to be appropriate, accurate and secure. A clinician can document only what the assessment and available information support. They cannot promise a note, create an unsupported retroactive date or guarantee that the school will accept it. Bring the school’s request, dates, reason and relevant records; the clinical documentation decision remains separate from the school’s administrative decision. Sources: College of Nurses of Ontario and MedVibe.

When a MedVibe request may fit

For an adult student aged 18 or older who is physically located in Ontario, MedVibe’s medical-note service can receive a school-absence request when the school actually requires documentation. The clinician reviews the situation and decides whether a document is clinically supported and whether virtual care is appropriate. The service is not for minors, does not replace school policy and does not guarantee that a note will be issued or accepted. Source: MedVibe.

This guide summarizes general provincial rules as verified on September 11, 2026; it does not decide the policy of a school, school board or private institution. A prolonged absence, accommodation, chronic illness or special program may follow a different process. Start with the school administration and ask for the written rule that applies to the record.