Can I just pick a home sleep test instead of polysomnography?

Not unilaterally — all sleep tests need a physician order. But you can advocate for the home test if your situation is straightforward. Most physicians agree when there's no central apnea suspicion, no significant heart or lung disease, and nothing else they need to rule out.

Is a home sleep test as accurate as polysomnography?

For uncomplicated obstructive sleep apnea in adults, the apnea-hypopnea index from a home test is clinically equivalent. For other sleep disorders (narcolepsy, REM behavior disorder) or patients with serious cardiopulmonary disease, in-lab PSG is more accurate because it records sleep stages and additional channels.

What if my home test is inconclusive?

AASM guidelines recommend in-lab polysomnography as the next step when a home test is non-diagnostic and symptoms persist. The home test result isn't wasted — it gives the in-lab study a focused starting point.

Do I need a separate lab study to start CPAP?

Usually not. Most patients who start CPAP after a home sleep test use auto-titrating CPAP, which sets pressure automatically. If your clinical response is inadequate, your doctor may order a titration study in the lab then — but that's the exception, not the rule.

Polysomnography vs Home Sleep Test: Which One Do You Need?

Quick answer: Both tests diagnose obstructive sleep apnea. Polysomnography (PSG) is the in-lab study with ~24 channels including brain waves; a home sleep apnea test (HSAT) records 4–7 channels in your own bed. For uncomplicated adult OSA, AASM guidelines recommend the home test first. PSG is for complex cases, central apnea, neurological symptoms, kids, or significant comorbid disease.

Patients ask us this all the time, and the honest answer isn't a marketing one. Both tests work. They're not interchangeable. Which one's right depends on your clinical picture, what other sleep conditions your doctor needs to rule out, and your overall health. This article walks through the actual differences and how the American Academy of Sleep Medicine matches the test to the patient.

Side-by-side: PSG vs HSAT

Location: PSG is at a sleep lab; HSAT is at home in your own bed.
Sensors: PSG records ~24 channels including EEG; HSAT records 4–7.
Sleep staging: PSG identifies REM, N1, N2, N3; HSAT does not stage sleep.
Duration: PSG is one supervised night; HSAT is usually two consecutive nights.
Cost: PSG runs $1,500–$3,000; HSAT runs $150–$400 before insurance.
AHI accuracy for uncomplicated OSA: equivalent for moderate-to-severe disease.
Other sleep disorders detected: PSG yes (narcolepsy, RBD, PLMD); HSAT no.

When is in-lab polysomnography the right call?

In-lab testing is appropriate when the clinical picture is anything other than straightforward OSA. The specific indications:

Suspected central sleep apnea — you can't make this diagnosis without EEG plus effort channels together
Significant heart failure, severe COPD, or neuromuscular disease
Suspected narcolepsy or REM behavior disorder
Pediatric patients (under 18)
PAP titration where pressure needs to be set in a controlled environment
Non-diagnostic home test in someone with persistent symptoms

When does a home sleep test do the same job?

AASM's 2017 clinical practice guideline (reaffirmed 2023) is explicit: home sleep testing is the recommended first study for adults with moderate-to-high pretest probability of uncomplicated obstructive sleep apnea. In practice, that means an adult with loud habitual snoring plus one or more of: witnessed apneas, daytime sleepiness, BMI over 30, hypertension, or neck size greater than 17 inches in men or 16 inches in women.

For those patients, the home test answers the diagnostic question, do you have OSA, and how bad, without the lab visit, the cost, or the first-night effect.

What do the AASM guidelines actually say?

Clear, in their words: HSAT is recommended as the initial test for uncomplicated adult OSA. PSG is recommended when comorbid conditions make HSAT unreliable. The guideline doesn't say one test is better than the other in absolute terms, it matches each test to a specific patient population.

How does insurance cover each?

Both are well-covered when ordered appropriately. The CPT codes you'll see on your EOB:

CPT 95810 — in-lab attended polysomnography
CPT 95800 — home sleep test with airflow, oxygen, heart rate (most common)
CPT 95801 — home test with minimum channels (oximetry-based)
HCPCS G0398 — Medicare home sleep test, type II

Out-of-pocket cost varies with your deductible status and in-network status. Worth knowing: PSG pricing varies a lot by facility. Hospital-based labs bill at hospital rates; freestanding accredited labs are meaningfully cheaper. Home test pricing is more uniform because the device cost is the same regardless of provider.

How do I get the right test ordered?

All sleep tests need a physician order. Path: talk to your primary care physician (or request a sleep medicine consult directly), describe your symptoms honestly, let the physician choose. If they order a home sleep test, Advanced Sleep Medicine Services ships an FDA-approved device anywhere in California, results back to your doctor within a few days. Call (877) 775-3377 to verify your insurance before the order goes through.