You can get tested for sleep apnea in two main places: at home with a portable monitoring device or overnight in a sleep lab or clinic. Most people start by visiting their primary care doctor or a sleep specialist, who determines which type of test fits your situation. You can also order a home test through online telehealth companies that connect you with a prescribing physician virtually.
Starting the Process: Your First Step
The typical path begins with a doctor’s visit, either in person or through telemedicine. Your doctor will ask about symptoms like loud snoring, daytime sleepiness, and gasping during sleep, and may use a screening tool called the STOP-BANG questionnaire. This eight-question assessment scores you from 0 to 8 based on factors like snoring, tiredness, observed breathing pauses, blood pressure, BMI, age, neck size, and gender. A score of 0 to 2 puts you in the low-risk category, while 5 to 8 indicates high risk for moderate to severe sleep apnea.
Doctors who diagnose and treat sleep apnea come from several specialties. Sleep medicine certification is offered across family medicine, internal medicine, psychiatry, neurology, pediatrics, and ear-nose-throat surgery. So your referral might go to a pulmonologist, a neurologist, or another specialist depending on your other health conditions and what’s available in your area.
Home Sleep Apnea Tests
Home testing is now the most common diagnostic pathway. In a large study of commercially insured patients in the U.S., about 31% were diagnosed using a home test alone, making it the single most frequent route to diagnosis. Your doctor prescribes a portable device, you pick it up or have it shipped to you, wear it for one or two nights in your own bed, then send it back for analysis by a sleep medicine specialist.
These devices are simpler than what you’d encounter in a lab. Most home tests monitor oxygen levels, breathing effort, nasal airflow, blood volume changes, and body movement. What they typically don’t measure is brain wave activity, which means they can’t precisely track your sleep stages or confirm exactly how long you were asleep versus just lying in bed. They record total time in bed rather than total sleep time, which can affect the accuracy of results.
A newer type of home device uses a different approach, measuring changes in blood flow in your finger to detect breathing disruptions. These devices can better distinguish between wakefulness, light sleep, deep sleep, and REM sleep without needing the brain wave sensors used in a lab. This gives a more accurate picture of how many breathing events occur per hour of actual sleep.
Home tests work well for people whose primary concern is obstructive sleep apnea without other complicating conditions. They cost a few hundred dollars and are usually covered by insurance. Medicare covers Type II, III, and IV home devices as long as you show clinical signs and symptoms of sleep apnea.
In-Lab Sleep Studies
An overnight study in a sleep lab, called polysomnography, is the most thorough option. You spend a night in a clinic room while a technologist monitors your brain waves, eye movements, heart rate and rhythm, breathing patterns, blood oxygen levels, body position, chin muscle activity, leg movements, and snoring. This level of detail makes it the better choice if your doctor suspects something beyond straightforward obstructive sleep apnea, such as central sleep apnea, periodic limb movement disorder, or narcolepsy.
About 24% of patients in the U.S. study were diagnosed through a standard in-lab study alone. Another 20% had a diagnostic study followed by a second night (or second half of the same night) for a titration study, where a CPAP machine is calibrated to the right pressure setting while you sleep. Roughly 15% had what’s called a split-night study, where diagnosis and CPAP calibration happen in a single overnight visit.
In-lab studies cost significantly more than home tests, often running into the thousands of dollars. Insurance increasingly steers patients toward home testing first, though Medicare covers in-lab studies (Type I) when performed in a sleep lab facility. Sleep specialists acknowledge that sleeping in an unfamiliar room while attached to sensors and wires produces a different night of sleep than you’d have at home, but the richness of the data typically compensates for that.
Ordering a Test Online
If you’d rather skip the in-person doctor visit, several telehealth companies let you order a home sleep test directly through their websites. The process generally works like this: you purchase the test, complete a telemedicine consultation with a company-affiliated doctor, and if the physician determines you’re a good candidate, they prescribe the test and ship the device to you. Results are interpreted by a sleep medicine specialist and returned to you, often with treatment recommendations.
This route is convenient, but it has limits. A telemedicine-only interaction may miss physical findings that an in-person exam would catch, and these services are designed to screen for obstructive sleep apnea specifically. If your sleep problems turn out to involve something more complex, you’ll likely still need a referral to a sleep clinic.
What Happens After the Test
Regardless of where your test is done, the key number in your results is the apnea-hypopnea index, or AHI. This counts how many times per hour your breathing partially or fully stops during sleep. An AHI of 5 to 15 indicates mild sleep apnea, 15 to 30 is moderate, and above 30 is severe.
If your home test comes back negative but your doctor still suspects sleep apnea, you may be sent for an in-lab study. Home tests can underestimate the severity of the condition because they measure breathing events per hour of recording time, not per hour of confirmed sleep. A negative home test doesn’t always rule out the diagnosis.
One large analysis found 103 unique care pathways for sleep apnea diagnosis, ranging from a single test to as many as 14 sleep tests over time. But five common pathways accounted for over 92% of patients. Most people follow a straightforward route: one home test or one lab study, sometimes followed by a titration study to set up treatment. The process from your first doctor visit to starting therapy can take weeks to a few months depending on scheduling, insurance approvals, and whether repeat testing is needed.
Choosing Between Home and Lab Testing
For most adults with a strong suspicion of obstructive sleep apnea and no other major sleep or medical conditions, a home test is a reasonable and cost-effective first step. Your insurance company may actually require it before approving a more expensive lab study.
An in-lab study is the better starting point if you have heart failure, chronic lung disease, neuromuscular conditions, or if your doctor suspects a sleep disorder other than obstructive apnea. It’s also preferred for people who’ve had an inconclusive home test or whose symptoms don’t match the home test results. Children are generally tested in a lab rather than at home, since pediatric sleep apnea has different patterns and thresholds.