Getting a sleep study typically starts with a visit to your primary care doctor, who can either order the test directly or refer you to a sleep specialist. Most people need a documented reason, such as loud snoring, witnessed breathing pauses, or excessive daytime sleepiness, before insurance will cover the study. The process from that first appointment to results usually takes a few weeks, and in many cases you can do the test at home rather than spending a night in a sleep lab.
Step 1: Talk to Your Doctor
Your primary care doctor is the usual starting point. Describe your sleep problems in specific terms: how long they’ve been happening, whether a partner has noticed snoring or gasping, and how tired you feel during the day. Doctors look for a cluster of indicators that suggest a condition like obstructive sleep apnea, including intense snoring, waking up choking, high blood pressure, large neck circumference, obesity, daytime sleepiness, and irregular heart rhythm. A BMI above roughly 31 in men or 32 in women significantly raises the likelihood of sleep apnea and strengthens the case for testing.
Your doctor may have you fill out a questionnaire about daytime sleepiness to gauge severity. Based on your symptoms and medical history, they’ll either order a sleep study themselves or send you to a board-certified sleep medicine physician for further evaluation. If your insurance requires a referral or prior authorization, your doctor’s office typically handles that paperwork.
Step 2: Get the Right Type of Study
There are two main options: an in-lab sleep study (polysomnography) and a home sleep apnea test. Which one you need depends on what your doctor suspects and whether you have other health conditions.
Home Sleep Apnea Test
If you’re otherwise healthy and your doctor strongly suspects moderate to severe obstructive sleep apnea, a home test is often the first choice. You pick up a small device from your doctor’s office or a sleep clinic, or it arrives by mail. The kit typically includes a finger clip to measure blood oxygen, a nasal sensor to track airflow, and a belt or strap to monitor breathing effort. You wear it for one or two nights in your own bed, then return or mail back the device. A sleep physician reviews the data and schedules a follow-up to discuss results.
Home tests are simpler and cheaper, but they have a notable limitation: most don’t measure brain waves, so they can’t track your sleep stages or confirm how much you actually slept. That means they sometimes underestimate severity or miss the diagnosis entirely. If your home test comes back negative, inconclusive, or has technical problems, guidelines from the American Academy of Sleep Medicine strongly recommend following up with a full in-lab study.
In-Lab Polysomnography
A lab-based study is the gold standard. You spend a night at a sleep center, usually arriving in the evening and leaving the next morning. A technician places sensors on your scalp to record brain activity, a clip on your finger for oxygen levels, sensors at your nostrils for airflow, belts around your chest and abdomen to measure breathing effort, and electrodes to monitor heart rhythm and chin muscle activity. It sounds like a lot of hardware, but most people do manage to fall asleep.
In-lab testing is specifically recommended over home testing if you have significant heart or lung disease, neuromuscular conditions, a history of stroke, chronic opioid use, severe insomnia, or if your doctor suspects a condition other than obstructive sleep apnea, such as central sleep apnea, narcolepsy, or parasomnias like sleepwalking. The brain wave monitoring makes it possible to diagnose these conditions, which a home test simply cannot do.
Insurance and Cost Considerations
Most insurance plans, including Medicare, cover sleep studies when there’s documented medical necessity. That means your medical record needs to show symptoms of a sleep disorder confirmed by a physician examination. For home sleep testing specifically, Medicare requires that you have a high likelihood of moderate to severe obstructive sleep apnea and that the test is performed as part of a comprehensive sleep evaluation. Patients with significant lung disease, neuromuscular disease, or heart failure generally won’t qualify for a home test under Medicare and will need the in-lab version instead.
If your insurance requires prior authorization, your doctor’s office will submit your clinical information before the study is scheduled. Without insurance, an in-lab polysomnography can run $1,000 to $3,000 or more depending on the facility and location, while home sleep tests typically cost $200 to $600. With insurance, your out-of-pocket share depends on your plan’s copay and deductible structure. Calling your insurer before scheduling to confirm coverage is worth the five minutes.
How to Prepare for the Night
On the day of your study, follow your normal routine as closely as possible. The goal is to capture a typical night of sleep. Avoid naps that day, since they can make it harder to fall asleep during the test. Skip caffeine from the afternoon onward. If you take prescription medications, continue them unless your sleep doctor specifically tells you to pause something.
For an in-lab study, bring whatever you normally sleep in, plus a change of clothes for the morning. Most sleep centers have private rooms that look more like hotel rooms than hospital rooms. You can read, watch TV, or scroll your phone before lights out. For a home test, follow the device instructions carefully. Loose sensors are the most common reason for unusable data, which would mean repeating the test.
Understanding Your Results
The key number in a sleep apnea evaluation is the apnea-hypopnea index, or AHI. This counts how many times per hour your breathing partially or completely stops during sleep. The severity scale, as defined by Harvard Medical School’s sleep program, breaks down like this:
- Normal: fewer than 5 events per hour
- Mild sleep apnea: 5 to 14 events per hour
- Moderate sleep apnea: 15 to 29 events per hour
- Severe sleep apnea: 30 or more events per hour
An in-lab study also produces data on your sleep stages, oxygen dips, heart rhythm, and limb movements, giving a much fuller picture than the AHI alone. Your sleep doctor will walk you through all of this at a follow-up appointment, typically scheduled within one to two weeks after the study.
If your AHI lands in the moderate or severe range, treatment usually involves a CPAP machine, which delivers steady air pressure through a mask to keep your airway open. In some cases, your doctor may recommend a second night in the lab (called a CPAP titration study) to dial in the right pressure setting. Mild cases may be managed with a dental appliance, positional therapy, or lifestyle changes like weight loss, depending on your specific situation.
What If Your Doctor Pushes Back
Some people feel dismissed when they bring up sleep concerns, especially if they don’t fit the classic profile of a middle-aged, overweight man. Sleep apnea occurs in women too, particularly after menopause, and in people who aren’t obviously overweight. If your doctor doesn’t think a study is warranted but you have persistent symptoms like waking up exhausted despite adequate sleep hours, excessive daytime sleepiness, or a partner reporting loud snoring and breathing pauses, you can ask for a referral to a sleep specialist directly. Sleep medicine physicians evaluate the full range of sleep disorders and are more likely to order testing based on subtle presentations.
Some direct-to-consumer services now offer home sleep apnea tests that you can order without a referral, though a licensed physician still reviews the results. These can be a reasonable option if access to a sleep specialist is limited in your area, but keep in mind that insurance reimbursement may be harder to secure without a traditional referral pathway.