Sleep Medicine

What is a Sleep Medicine Specialist/Doctor?

Sleep medicine specialists are physicians with additional, specialized training in the field of sleep—specifically, in the area of diagnosing and managing sleep disorders

Why would you need to to see a Sleep Medicine Specialist?

Do you...

  • think you're sleep deprived?

  • snore to wake up

  • gasping or choking at night?

  • wake up feeling tired and stay tired during the day?

  • experience drowsy driving?

  • have high blood pressure?

If you answered yes to any of these, you may be at risk for sleep apnea.

Sleep Center at Greater Regional

Lack of adequate sleep is associated with a variety of chronic diseases, such as cardiovascular disease, obesity, and diabetes and also is often a factor in motor vehicle collisions which result in injury and disability. According to the CDC, more than 25% of the U.S. population report they occasionally do not get enough sleep and nearly 10% experience chronic insomnia. Adequate sleep is important to one's good health. Greater Regional Health has offered highly specialized sleep lab services since 2001. Our team is specially trained in the diagnosis and treatment of sleep disorders.

Greater Regional Sleep Medicine is AASM Accredited. Since 1977, the American Academy of Sleep Medicine (AASM) Standards for Accreditation have been the gold standard by which the medical community and the public evaluate sleep medicine facilities. Achieving AASM accreditation demonstrates a sleep medicine provider’s commitment to high quality, patient-centered care through adherence to these standards.

Our Providers

Annie Nawab, MD, FCCP

Megan Ng, ARNP

Contact Us

Sleep Center

Northside of Main Campus

1700 W. Townline St

Creston, IA 50801



8 a.m.- 5 p.m.

Meet Our Providers


Annie Nawab,

Megan Ng,

Megan Ng, ARNP.jpg

My philosophy for care is to treat my patients with respect regardless of their color, ethnicity, nationality or religious preferences with as I do my own family.

I saw the impact my grandmother made as a nurse and wanted to help others as she did.