Subject: Leaving early. Hi [Manager], I have a doctor's appointment on [day] and will need to leave by [time]; I'll finish my priorities first. Thanks, [Name].
By email
How to Email Your Boss About A doctor's appointment
When your workplace expects things in writing, a short email about a doctor's appointment keeps a clear record. Put the key facts up front.
Say what you need, briefly
A doctor's appointment often only runs in work hours. Give the date and your leaving time; a medical appointment is a complete reason without further detail.
Structure it as a short email
In an email, lead with a plain subject line, put the day and leaving time in the first line, add one line on how your work is covered, and keep a courteous sign-off. An email should be shorter than a chat message, not longer.
Example messages
Subject: Leaving early. Hi [Manager], Quick reminder that I have my appointment this afternoon and will head out around [time]. Thanks, [Name].
Subject: Leaving early. Hi [Manager], I need to leave by [time] for an appointment I can't move; my key work will be done beforehand. Thanks, [Name].
Mistakes to avoid
Don't write a long paragraph or bury the ask. Put the day and leaving time in the first line so it's seen at a glance.
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This page shares wording ideas, not legal or HR advice. Follow your own employer's time-off policy.
Common questions
Do I have to say it's the doctor?
No. A medical appointment you can't move is complete.
Email or a quick message?
Use email where a written record is expected; a chat message is fine elsewhere.