# Sleep doctors in O Fallon

> 2 sleep medicine specialists in O Fallon, Illinois — with contact details and clinic affiliations.

Canonical: https://findsleepdoctors.com/us/il/o-fallon
Last updated: 2026-10-30

O Fallon, Illinois, United States — sleep medicine doctors with verified addresses, phone numbers and clinic affiliations. Cost varies; confirm with your provider and insurer/health fund.

2 sleep specialists listed.

## Sleep doctors in O Fallon

Looking for someone closer? Use the location search on the home page to sort every nearby practice by distance.

### MSA ALLIANCE, LLC

Sleep Medicine · Affiliated with MSA ALLIANCE, LLC · Phone: 618-628-2502

Profile: [view details](https://findsleepdoctors.com/us/il/o-fallon/msa-alliance-llc)

### ST ELIZABETHS HOSPITAL OF THE HOSPITAL SISTERS OF THE THIRD ORDER

Sleep Medicine · Affiliated with ST ELIZABETHS HOSPITAL OF THE HOSPITAL SISTERS OF THE THIRD ORDER · Phone: 866-650-4660

Profile: [view details](https://findsleepdoctors.com/us/il/o-fallon/st-elizabeths-hospital-of-the-hospital-sisters-of-the-third-order)

## Sleep doctors near O Fallon

- [O'Fallon](https://findsleepdoctors.com/us/il/ofallon) — 1 doctors
- [Shiloh](https://findsleepdoctors.com/us/il/shiloh) — 3 doctors
- [Belleville](https://findsleepdoctors.com/us/il/belleville) — 4 doctors
- [Maryville](https://findsleepdoctors.com/us/il/maryville) — 1 doctors
- [Glen Carbon](https://findsleepdoctors.com/us/il/glen-carbon) — 1 doctors
- [Centreville](https://findsleepdoctors.com/us/il/centreville) — 1 doctors
- [Sauget](https://findsleepdoctors.com/us/il/sauget) — 1 doctors
- [Edwardsville](https://findsleepdoctors.com/us/il/edwardsville) — 1 doctors

## Frequently asked questions

### How do I find a sleep doctor near me?

Start with the list on this page — every sleep medicine doctor below was verified from a public source. Use the phone number or website on each profile to book; most practices ask for a GP referral first.

### What does a sleep doctor treat?

Sleep specialists diagnose and treat obstructive sleep apnoea, insomnia, narcolepsy, restless legs syndrome, circadian rhythm disorders and snoring-related problems.

### How much does an appointment cost?

Cost varies by practice, insurer and treatment. This directory does not publish prices — confirm the cost with the practice and your insurer or health fund before booking.

## Related
- [All sleep doctors in Illinois](https://findsleepdoctors.com/us/il)
- [Sleep doctors in United States](https://findsleepdoctors.com/us)
- [Home](https://findsleepdoctors.com/)