At Valley Sleep Center, we are the sleep experts and we are here to help you take control of your sleep health. Most insurance companies do not require a referral to meet with one of our Board Certified Sleep Physicians and providers.
If you are having sleeping problems, the first step would be to make an appointment for a sleep consultation to meet with one of our sleep physicians. At that time they will determine if a sleep study is necessary.
Click here to schedule an appointment or call 480-830-3900.
Wahaj Ahmed, M.D.
Medical Director, Mesa, Chandler
Dr. Ahmed is board certified in internal medicine, pulmonary disease, critical care medicine and sleep medicine. His practice encompasses all aspects of diagnosis and treatment of pulmonary and sleep disorders.
Maria Martinez, M.D.
Medical Director, Arrowhead
Dr. Maria Martinez is a pediatric pulmonologist in Phoenix, Arizona. She received her medical degree from Universidad de Navarra Faculty of Medicine and has been in practice for 31 years.
Michael Mohan, M.D.
Medical Director, Biltmore, Scottsdale
Dr. Mohan is a graduate of Yale University and Harvard Medical School. He went on to complete postgraduate medical training at Massachusetts General Hospital, Beth Israel Deaconess Medical Center, and Boston Children’s Hospital, some of the top-ranked hospitals in the world. He is one of the only physicians in Arizona to have received dedicated Fellowship training in Sleep Medicine, having completed Harvard’s Sleep Medicine Fellowship Training Program in 2016. He has authored journal articles, textbook chapters, and teaching materials on the subject of sleep disorders. Dr. Mohan is board certified in sleep medicine and a member of the American Academy of Sleep Medicine.
James Davis, M.D.
Consulting Physician, Mesa, Chandler
Dr. James Davis completed his Internal Medicine training at Presence Saint Joseph Hospital in Chicago, Illinois. He completed a Pulmonary Medicine Fellowship at Rosalind Franklin University of Medicine and Science in North Chicago, Illinois. He also completed a Sleep Medicine Fellowship at Hennepin County Center in Minneapolis, Minnesota. Dr. Davis is a member of the American Thoracic Society, American College of Chest Physicians, and American Academy of Sleep Medicine. He is triple board certified in Internal Medicine, Pulmonary Medicine, and Sleep Medicine. In addition to managing various pulmonary disorders, Dr. Davis has a special interest in Sleep Medicine. He treats a variety of sleep disorders, including complex sleep-disordered breathing, insomnia, hypersomnia, restless leg syndrome, in both the adult and pediatric patient populations. He also has a particular interest in sleep and its effects on athletic performance. In his free time, he enjoys being active: doing strength and cardiovascular training, hiking, snowboard/skiing, dining out at restaurants, going to the movies, and traveling. He also enjoys spending time with his family and friends.
DNP, RN, FNP-BC, FNP-C
Kimberly Vana, DNP, RN, FNP-BC, FNP-C is a sleep health nurse practitioner who actively is involved with national and local sleep organizations. She also has published several sleep research articles. Currently, she is a Clinical Professor at a college of nursing in the Phoenix, Arizona area.
MSN, RN, AGACNP-BC
Nicholas Failla, MSN, RN, AGACNP-BC, is a board certified Adult-Gerontology Acute Care Nurse Practitioner. He has a wide-range of experience as a healthcare professional, including cardiovascular and pulmonary care.
Margena Y. Staten-Branch
Margena Staten-Branch, MSN, NP-C is a sleep nurse practitioner. She has worked in chronic disease management and preventative care. She enjoys educating patients.
MBA, MSN, FNP-C
Samantha Esquivias, MBA, MSN, FNP-C, is a sleep nurse practitioner. She has worked inpatient and outpatient from pediatrics to adults. She is currently working on obtaining her Doctorate of Nursing specializing in psychiatry and mental health.