
Key takeaways
- Hazelwood and Tesson Ferry are open Friday 9 to 12 only. O'Fallon is by appointment on Wednesday and Friday.
- All three rooms close 12 to 2 every weekday. A 12:15 call goes to voicemail; a 2:05 call does not.
- A Friday-afternoon crash means the lag plays out over the weekend. That is uncomfortable, not dangerous, unless something on the emergency list appears.
- Use the weekend to write down what changes and when. Call Monday at nine.
- Worse, not stiffer, is an emergency room trip regardless of the day.
Most of the desk's mail arrives on Monday morning, and a lot of it starts the same way: it happened Friday, I felt fine, I did not feel fine by Sunday, and now what. Here is the calendar piece we should have run years ago.
The hours, as published
Hazelwood and South County on Tesson Ferry run Monday through Thursday 9 to 6 and Friday 9 to 12. O'Fallon runs Monday, Tuesday, and Thursday 9 to 6, with Wednesday and Friday by appointment. Every room closes from noon to two every day. The clinic publishes all of this, and the desk reprints it because the Friday noon line is the one that bites.
What that means in practice: a Thursday-night crash has a real Friday-morning window, nine to twelve. A Friday-afternoon crash does not, and the next open door is Monday at nine.
Friday afternoon
First, the bright line. Chest pain, a sudden severe headache, weakness or numbness on one side, trouble speaking, a loss of bowel or bladder control, or a head injury with vomiting or worsening confusion is an emergency room trip right now, not a call to a clinic. Weekends do not change that list. If any of it is true, the emergency room is open and the clinic is not, and that is the correct arrangement.
If none of it is true, you are in the lag. Adrenaline covers the afternoon. Evening brings the first stiffness. The explainer lays out why, but the short version is that the next two mornings will each be a little worse than the last, and that this is expected rather than alarming.
Saturday and Sunday
Use the weekend to take notes. Not a diary, a list: where it hurts, what makes it worse, whether the headache is morning or evening, how far the head turns before it objects, how you slept. You are not diagnosing yourself. You are taking notes for the person who will on Monday, and notes beat memory by a wide margin.
Watch for the difference between stiffer and worse. Stiffer is the lag. Worse is escalating pain, spreading numbness or weakness, a headache that is building rather than settling, confusion, repeated vomiting. Worse goes to the ER, on a Saturday or any other day. The standing correction has the full list.
Leave a voicemail at the room you plan to use if it makes you feel better. It will not be heard until Monday, but it puts your name and the crash date in the queue, and it saves you the Monday-morning scramble.
Monday at nine
Call. Say it was an auto injury, give the date (Friday), mention the head if the head is involved, ask for the earliest opening. South County (314) 530-5480, Hazelwood (314) 627-1411, O'Fallon (636) 280-0990. The first visit is an exam with findings written down and dated, and a plan you take home. Bring your weekend notes, your insurance card, and any paperwork from an ER or urgent care if you went. The service desk page has the full list.
Do not call at 12:10. Every room is closed from noon to two, and the desk hears from readers every week who took the silence personally.
West Terra Lane is by appointment on Wednesday and Friday, so a Monday call is also how you get a Wednesday slot. If Monday is a holiday and the room is closed, Tuesday is the next full day. Confirm on the phone; the clinic's site is the authority on hours and this desk is not.
Why the weekend does not cost you the exam
Three days is a lag, not a deadline. The exam on Monday still describes a fresh injury, and the dated record from that first visit is the document your care runs on from there. If a claim is ever part of your story, it is also the document everyone will ask for. You do not need to have decided anything about that before you walk in. This page is educational and is not medical advice, and, as the footer says, it is advertising.
Service desk
Monday at nine. Or now, if it is before noon.
Call the nearest room, say auto injury, give the date, take the earliest opening.