# Sleep study guides

SleepStudies has 10 guides on sleep studies and sleep disorder diagnostic clinics, grouped by country.

## General

- [CPAP Titration and Split-Night Sleep Studies](https://sleepstudies.fyi/guides/cpap-titration-and-split-night-sleep-studies.md): A CPAP titration study finds the air pressure that keeps your airway open; a split-night study combines diagnosis and titration in one night when sleep apnea is clear early on.
- [Home Sleep Apnea Test vs In-Lab Sleep Study](https://sleepstudies.fyi/guides/home-sleep-apnea-test-vs-in-lab-sleep-study.md): A home sleep apnea test (HSAT) is cheaper and more convenient and works well for adults with likely moderate-to-severe obstructive sleep apnea; an in-lab study is more complete and is needed for complex cases and children.
- [How Much Does a Sleep Study Cost? CPT Codes and Prices](https://sleepstudies.fyi/guides/how-much-does-a-sleep-study-cost-cpt-codes.md): A home sleep apnea test typically costs $150 to $600 cash, while an in-lab sleep study ranges from about $800 to over $3,500; the CPT code, facility type and insurance determine what you pay.
- [Medicare and DOT CPAP Compliance Rules](https://sleepstudies.fyi/guides/medicare-and-dot-cpap-compliance-rules.md): Medicare continues CPAP coverage if you use it at least 4 hours a night on 70% of nights in a 30-day stretch within the first 3 months and see a clinician between day 31 and 91; DOT examiners often apply a similar standard.
- [Multiple Sleep Latency Test (MSLT) for Narcolepsy](https://sleepstudies.fyi/guides/multiple-sleep-latency-test-mslt-narcolepsy.md): The MSLT is a daytime nap study done the morning after an overnight sleep study; a mean sleep latency of 8 minutes or less with two or more REM-onset naps supports a diagnosis of narcolepsy.
- [Oral Appliance Therapy and Inspire: CPAP Alternatives](https://sleepstudies.fyi/guides/oral-appliance-therapy-and-inspire-alternatives.md): If you can't tolerate CPAP, a custom oral appliance or hypoglossal nerve stimulation (Inspire) can treat obstructive sleep apnea; each has specific eligibility criteria and insurance rules.
- [Pediatric Sleep Studies: What Parents Should Know](https://sleepstudies.fyi/guides/pediatric-sleep-studies-what-parents-should-know.md): A pediatric sleep study is an overnight in-lab polysomnography for children, often ordered for snoring, pauses in breathing or restless sleep; a parent stays overnight and home tests are not recommended for kids.
- [Understanding AHI: Apnea-Hypopnea Index Scores](https://sleepstudies.fyi/guides/understanding-ahi-apnea-hypopnea-index-scores.md): The apnea-hypopnea index (AHI) is the number of breathing pauses and shallow-breathing events per hour of sleep; in adults, under 5 is normal, 5–14 mild, 15–29 moderate and 30 or more severe sleep apnea.
- [What Is a Sleep Study? Polysomnography Explained](https://sleepstudies.fyi/guides/what-is-a-sleep-study-polysomnography.md): A sleep study, or polysomnography (PSG), is an overnight test that records your brain waves, breathing, oxygen, heart rhythm and movements to diagnose sleep disorders such as sleep apnea.
- [What to Bring to an Overnight Sleep Study](https://sleepstudies.fyi/guides/what-to-bring-to-an-overnight-sleep-study.md): Bring your ID, insurance card, medication list, comfortable two-piece sleepwear, your own pillow, toiletries and a phone charger; arrive with clean, dry hair and no caffeine after noon.