Sleep Studies in Denver and Across Colorado

Accurate diagnosis, real answers

Quick Answer: What Is a Sleep Study?

A sleep study records your breathing, oxygen levels, and heart rate while you sleep to help diagnose sleep apnea and other sleep disorders. Our physicians use home testing or in-lab polysomnography at our AASM-accredited labs, then build a personalized treatment plan with you.

Why it matters

Why Accurate Sleep Testing Matters for Your Health

Sleep problems rarely exist in isolation. Poor sleep affects immune function, hormone production, mental health, and cardiovascular wellness. Without proper testing, underlying sleep disorders like sleep apnea, restless legs syndrome, or narcolepsy can go undiagnosed for years, with real health consequences. Accurate sleep testing gives you and your care team a roadmap toward restorative sleep.

Your options

At-Home vs. In-Lab Sleep Study

Home Sleep Apnea Testing (HSAT)

Rebis home sleep tests use the SleepImage Ring, a single ring worn on your finger overnight. It measures blood flow signals, oxygen levels, and pulse, and estimates when you're asleep. It works well for diagnosing obstructive sleep apnea when symptoms clearly point to a breathing-related sleep disorder.

  • Sleep in your own bed, familiar surroundings
  • One ring on your finger, with no nasal tubes, belts, or wires
  • Pick up at a Rebis location or have it mailed to you
  • Every recording checked for quality before it's interpreted
  • Cost-effective for straightforward sleep apnea evaluation

In-Lab Polysomnography (PSG)

Comprehensive sleep studies in the Rebis sleep lab monitor brain waves, eye movements, muscle activity, heart rhythm, and breathing patterns. This complete picture matters most for complex cases or when multiple sleep disorders might be present.

  • Brain wave patterns (EEG) to identify sleep stages
  • Eye movements to detect REM sleep
  • Muscle tension and movement
  • Heart rate and rhythm
  • Breathing patterns, airflow, and oxygen saturation
  • Leg movements, to identify periodic limb movement disorder

    • Available at our sleep centers in Westminster, Longmont, and Frisco.

Study types

Types of Sleep Studies at Rebis Health

Our AASM-accredited sleep labs in Westminster, Boulder/Longmont, and Frisco perform the following studies. Your provider chooses the right one based on your symptoms and history.

Diagnostic Polysomnography (PSG)

A full overnight study that records brain activity, eye movements, muscle tone, heart rhythm, breathing effort, airflow, oxygen levels, and body position while you sleep in a private room. A sleep technologist monitors you all night. It is used to evaluate obstructive and central sleep apnea, REM sleep behavior disorder, periodic limb movement disorder, parasomnias, and other sleep conditions.

Split-Night Sleep Study

A diagnosis and a first CPAP trial in one night. If the first part of your study shows enough breathing interruptions, the technologist starts CPAP for the rest of the night, so you may not need to come back for a second study. If not, the study simply continues as a standard sleep study.

CPAP, BiPAP, and ASV Titration Studies

For patients already diagnosed with sleep-disordered breathing, a titration study finds the pressure settings that work best for you, adjusted by the technologist throughout the night. We perform CPAP, BiPAP (two pressure levels, often used for hypoventilation), and ASV (a device that adapts to your breathing, used for complex cases such as central sleep apnea that appears after starting CPAP).

Multiple Sleep Latency Test (MSLT)

The primary test for narcolepsy and idiopathic hypersomnia. It takes place the morning after an overnight study, with five scheduled nap opportunities two hours apart to measure how quickly you fall asleep and whether REM sleep occurs.

Maintenance of Wakefulness Test (MWT)

Measures how well you can stay awake in a quiet, dimly lit room across four 40-minute sessions, two hours apart. It is often used to check whether daytime sleepiness is well treated, and it is sometimes required for safety-sensitive jobs such as commercial driving.

Pediatric Sleep Studies (Ages 3 to 17)

In-lab studies adapted for children and teens. A parent or legal guardian stays for the entire study, children can bring a comfort item from home, and our technologists take extra time to help them feel at ease. Pediatric studies evaluate sleep-disordered breathing, restless sleep, suspected parasomnias, and other sleep concerns.

Carbon Dioxide (ETCO₂) Monitoring

When inadequate breathing during sleep (hypoventilation) is suspected, we also measure the carbon dioxide in each breath you exhale. It is included in pediatric studies for children 13 and younger and added for other patients when their provider orders it.

Locations

Where to Get a Sleep Study in Colorado

Rebis Health offers at-home sleep testing at all four Colorado clinics and in-lab sleep studies at three of them.

Westminster (North Denver Metro)

In-lab sleep studies and at-home testing. Serving Westminster, Arvada, Thornton, Broomfield, and Lakewood.

Lone Tree (South Denver Metro)

At-home sleep testing. If you need an in-lab study, we schedule it at another Rebis sleep lab. Serving Lone Tree, Parker, Centennial, Highlands Ranch, and Castle Rock.

Boulder and Longmont

In-lab sleep studies and at-home testing. Serving Boulder County and the northern Front Range.

Frisco (Summit County)

In-lab sleep studies and at-home testing. Serving Summit County and nearby mountain communities.

Not near a clinic? Virtual visits are available to Colorado residents, and you can come to any of our AASM-accredited sleep labs in Westminster, Boulder/Longmont, or Frisco for an in-lab sleep study.

Comparing your options? Read our guide to at-home vs. in-lab sleep studies.

Precision tools

How Home Sleep Testing Works

Single Point Home Testing

The SleepImage Ring collects data through one point of contact on your finger, so you can sleep naturally while it records.

Software-Assisted Analysis

Home studies include an automated analysis that our physicians review and verify against the raw data before any result is final.

Clear Results and Next Steps

Reports are usually ready within 7 to 10 business days. Your provider then walks you through your findings and specific next steps at a scheduled follow-up visit.

What we diagnose

What Sleep Testing Can Diagnose

Sleep testing, combined with your clinical evaluation, helps Rebis identify a wide range of sleep disorders.

Sleep-Disordered Breathing

  • Obstructive sleep apnea: airway collapse causing breathing interruptions
  • Central sleep apnea: brain signal problems affecting breathing control
  • Upper airway resistance syndrome: partial airway blockage causing sleep fragmentation
  • Nocturnal hypoventilation: inadequate breathing during sleep

Movement Disorders

  • Restless legs syndrome: uncomfortable leg sensations disrupting sleep
  • Periodic limb movement disorder: repetitive leg movements during sleep
  • REM behavior disorder: acting out dreams due to muscle paralysis failure

Neurological Sleep Disorders

  • Narcolepsy: excessive daytime sleepiness and sleep attacks
  • Idiopathic hypersomnia: chronic oversleeping despite adequate rest
  • Circadian rhythm disorders: a misaligned internal body clock

Our approach

The Rebis Approach to Sleep Testing

The sleep testing experience at Rebis begins with clear education about what to expect. Patients receive detailed instructions, comfortable accommodations, and supportive staff who understand that spending a night in a sleep lab can feel intimidating.

What sets Rebis apart is how sleep study results integrate with the entire care team. Using Dr. David McCarty's evidence-based Five Finger Approach, sleep physicians look beyond a diagnosis to consider how breathing problems, medication effects, circadian rhythms, and other factors contribute to each patient's sleep challenges.

When sleep apnea is diagnosed, the team uses the Five Reasons to Treat framework to help patients understand how treatment could improve their specific concerns, whether that is cardiovascular risk, daytime energy, or cognitive function.

Who this is for

Who Benefits From Sleep Testing

Suspected Sleep Apnea

Loud snoring, witnessed breathing pauses, morning headaches, or excessive daytime sleepiness often point to undiagnosed sleep apnea. Testing provides a definitive answer and severity rating to guide treatment.

Shift Workers and Travelers

Irregular sleep schedules create challenges standard sleep advice doesn't address. Testing helps identify circadian rhythm disorders and guides strategies for healthy sleep despite schedule demands.

Children With Complex Sleep Issues

Children With Complex Sleep Issues Pediatric sleep testing requires specialized expertise. Rebis offers in-lab sleep studies for children ages 3 to 17, with a parent or guardian staying overnight, and evaluates children with breathing problems, behavioral sleep issues, or developmental concerns that affect sleep quality.

Multiple Health Conditions

Sleep disorders often coexist with conditions like diabetes, depression, or chronic pain. Testing helps clarify how sleep problems contribute to overall health and guides integrated treatment.

Home Sleep Test Prep

Our team shows you how to use the ring and helps you set up the SleepImage app before you leave. No smartphone? A loaner tablet may be available. You'll complete a short questionnaire the evening before and the morning after your study.

In-Lab Study Prep

Maintain your normal daytime activities, avoid caffeine after noon, and skip alcohol unless your provider says otherwise. Arrive with clean, dry hair and no hair products or heavy lotions. Your private room has no clocks and the blinds are drawn, to minimize disruption to your normal sleep.

What to Bring

  • Two-piece pajamas and a change of clothes
  • Toiletries
  • Any regular medications
  • Reading material or a tablet for relaxation
  • Your CPAP mask, if you use one (leave the machine at home)

Getting ready

Preparing for Your Sleep Study

After your study

Understanding Your Results

Comprehensive Review

Your study is scored by our sleep team and interpreted by a Rebis sleep physician, who looks beyond basic measurements to understand your breathing patterns, oxygen levels, and sleep, then explains what it means for your health.

Treatment Planning

Results integrate directly with your broader care team. If sleep apnea is diagnosed, many patients can schedule a CPAP clinic appointment the same week; if another disorder is identified, the right specialist is looped in quickly.

Follow-Up Testing

Some patients benefit from repeat testing after starting treatment, especially for CPAP titration or monitoring how well treatment is working. The team coordinates any follow-up testing as part of ongoing care.

Sleep testing at Rebis is the start of a comprehensive approach to sleep health. The multidisciplinary team includes:

  • Sleep medicine physicians, for medical evaluation and treatment
  • Airway-focused dentistry, for oral appliance therapy and airway optimization
  • Functional medicine, for addressing root causes like inflammation and hormonal imbalance
  • Behavioral sleep medicine, for insomnia and sleep-related anxiety
  • CPAP specialists, for positive airway pressure therapy support

This integrated approach means sleep testing leads to effective, personalized treatment rather than just a diagnostic label.

Educational content only. Not medical advice.

The bigger picture

Beyond Testing: Complete Sleep Health Solutions

Common questions

Frequently Asked Questions

Quick answer: Sleep testing at Rebis uses home sleep apnea testing or in-lab polysomnography, chosen based on how complex your symptoms are. Reports are usually ready within 7 to 10 business days, and your provider reviews them with you at a scheduled follow-up visit.

  • Common signs include loud snoring, daytime sleepiness, morning headaches, difficulty concentrating, witnessed breathing pauses, restless sleep, or waking up unrefreshed despite adequate sleep time.

  • Home sleep tests are convenient and cost-effective for diagnosing straightforward sleep apnea. Lab studies provide comprehensive monitoring for complex cases, multiple sleep disorders, or when home testing results are unclear.

  • While sleeping in a new environment takes adjustment, most patients sleep adequately for diagnostic purposes. The comfortable rooms and experienced staff help minimize disruption to normal sleep patterns.

  • Reports are usually ready within 7 to 10 business days. If a study shows an urgent finding, it's flagged to your provider right away.

  • Normal sleep studies don't rule out all sleep problems. The Rebis team considers behavioral sleep disorders, circadian rhythm issues, or other factors that might not show up on standard testing.

  • Some medications can affect sleep study results, but stopping medications can be dangerous. The sleep medicine team provides specific guidance based on individual medical history and current medications.

  • Most patients don't need repeat testing unless symptoms change significantly or treatment isn't working. However, some conditions like central sleep apnea may require periodic monitoring. Additional testing may be required by Insurance if significant time has lapsed since the initial test to qualify for treatment or on-going treatment through insurance.

  • The Rebis team coordinates immediate next steps, which might include CPAP clinic appointments, dental sleep medicine consultation, or functional medicine evaluation depending on individual needs and preferences.

  • While focused on sleep disorders, comprehensive testing can identify heart rhythm abnormalities, breathing problems, or neurological issues that require follow-up with appropriate specialists.

  • Most insurance plans cover medically necessary sleep testing with proper documentation. The Rebis team helps verify coverage and navigate insurance requirements before scheduling studies.

  • Sometimes. If the first part of your sleep study shows enough breathing interruptions, our technologist may start CPAP for the rest of the night. This is called a split-night study, and it can give you a diagnosis and a first look at how CPAP works for you in one visit instead of two.

  • It starts the morning after your overnight sleep study and includes five nap opportunities spaced two hours apart, so plan to spend most of that day at the lab.