Dr. Jun is a pulmonary, critical care, and sleep medicine physician. He is an expert in the diagnosis and treatment of sleep-disordered breathing, and in the care of critically ill patients in the Medical ICU. He is a member of the Sleep Fellowship Program Evaluation and Clinical Competency Committee and provides teaching to medical students and residents at Johns Hopkins. Dr. Jun is rated as a Distinguished provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Cerebral Hypoxia, Obstructive Sleep Apnea, Obesity Hypoventilation Syndrome (OHS), and Central Sleep Apnea.

Dr. Philip (Flip) Smith joined the faculty of the Johns Hopkins University School of Medicine in 1977. He is a pulmonary and critical care trained physician. He is an expert in the diagnosis and treatment of sleep and breathing disorders and in the care of critically ill patients. In 1977, Dr. Smith became the Director of the Medical Intensive Care Unit at Johns Hopkins Bayview Medical Center (formerly Baltimore City Hospitals). He then established the Adult Sleep Clinic in 1980. Dr. Smith earned his M.D. from the Tulane University School of Medicine. He completed his residency at Johns Hopkins Bayview Medical Center and performed a fellowship in pulmonary medicine at Johns Hopkins Medicine. Dr. Smith is rated as a Distinguished provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Obstructive Sleep Apnea, Chronic Obstructive Pulmonary Disease (COPD), Excessive Daytime Sleepiness, and Lung Metastases.

Dr. Pham is a physician who specializes in pulmonary, critical care, and sleep medicine. He provides care for critically ill patients in the Medical ICU. His clinical focus is in the diagnosis and management of sleep-disordered breathing. He provides teaching to medical students, residents, and fellows at Johns Hopkins. Lab Website Polotsky Research Lab - Lab Website Research Summary Dr. Pham’s research focus is on the mechanisms and impact of sleep disordered breathing, with a particular emphasis on the role of hypoxia. His research interests have led him to the highlands of Peru, where he collaborates extensively with the CRONICAS cohort investigators to characterize the impact of hypoxia on respiratory patterns, cardiovascular responses and metabolism. He is currently involved in developing low-cost readily deployable strategies to treat sleep disordered breathing at high altitude. He has also pursued his research interests by modeling the metabolic impact of ambient hypoxia in the sleep lab. As a member of the leadership of the Center for Interdisciplinary Sleep Research and Education (CISRE), he is committed to improving investigators’ access to sleep recording and data analysis. Dr. Van Pham is rated as a Distinguished provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Obstructive Sleep Apnea, Cerebral Hypoxia, Central Sleep Apnea, and Obesity Hypoventilation Syndrome (OHS).

Dr. Marcus is a graduate of Emory University School of Medicine in Georgia. He completed his general surgery internship and Otolaryngology residency at Emory University School of Medicine. He completed a fellowship in otology and neurotology at the Silverstein Institute in Florida. Dr. Marcus is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Infant Hearing Loss, DFNB1, Cholesteatoma, and Benign Paroxysmal Positional Vertigo.

Dr. Tracey Smith Stierer is an assistant professor of anesthesiology and critical care medicine and otolaryngology-head and neck cancer at the Johns Hopkins University School of Medicine. Her area of clinical expertise is anesthesiology. Dr. Stierer serves as the director of the Division of Ambulatory Anesthesia and the director of clinical quality for the Division of Ambulatory Anesthesia in the Department of Anesthesiology and Critical Care Medicine at the Johns Hopkins School of Medicine. She earned her M.D. from Georgetown University School of Medicine. She completed two separate anesthesiology residencies at Johns Hopkins and a residency in anesthesiology and a residency in family practice at Georgetown University School of Medicine. Dr. Stierer is rated as an Advanced provider by MediFind in the treatment of Obstructive Sleep Apnea. Her top areas of expertise are Obstructive Sleep Apnea, Central Sleep Apnea, Drowsiness, and Excessive Daytime Sleepiness.

Dr. Christopher Earley's research and clinical interests are devoted to Sleep Medicine with a special interest in Restless Legs Syndrome. His current research is focused on understanding the pathophysiology of Restless Legs Syndrome and further elucidating the value of various treatments in this syndrome. Dr. Earley received his medical degree as well as a PhD in Pharmacology from the University College in Galway, Ireland. He completed a full residency in Internal Medicine at Baylor Medical College and then went to the University of Virginia in Charlottesville to complete his residency in Neurology. After then spending a year at the NIH as a fellow in the Neurobiology Unit, Dr. Earley joined the faculty at Johns Hopkins in 1991. 2008 Professor, Department of Neurology, Johns Hopkins 1994- Associate Director, Sleep Disorders Center, JHBMC Education and Training: 1973 - B.S. (General), Villanova University 1974 - B.A. (Psychology), Arizona State University 1978 - Ph.D. (Pharmacology), National University of Ireland 1983 - M.B., B.Ch. ( Medicine), National University of Ireland 1983-1984 Internship, University Hospital, Galway, Ireland 1984-1987 Resident in Internal Medicine, Baylor College of Medicine, Houston, TX 1987-1990 Resident in Neurology, University of Virginia, Charlottesville, VA 1990-1991 Senior Staff Fellow, Neurobiology Unit, NIH/NIA Professional Experience: 1991- Full-time Staff Neurologist, Johns Hopkins 1992-1999 Assistant Professor, Department of Neurology, Johns Hopkins 1993-2001 Director, Acute Stroke Service, 1994- Associate Director, Sleep Disorders Center 1994-1999 Co-Director, Neurosciences Critical Care Unit 1996-2000 Director, Neurovascular Ultrasound Lab 1999-2008 Associate Professor, Department of Neurology, Johns Hopkins. Dr. Earley is rated as an Advanced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Restless Legs Syndrome, Periodic Limb Movement Disorder, Narcolepsy, Seizures, and Gastrostomy.

Dr. Aruna Rao completed her Neurology residency at Johns Hopkins school of medicine followed by a fellowship in Sleep medicine. She sees patients at the headache center, cerebro spinal fluid (CSF) disorders center and sleep disorders center, which are located at the Johns Hopkins Bayview Medical Center. She specializes in all headache disorders including migraine, cluster, tension headaches, trigeminal neuralgia and facial pain. Dr. Rao is currently not accepting new patients. In the CSF Disorders Center she evaluates patients with pseudotumor cerebri and other CSF disorders. In the sleep disorders center she sees patients with sleep apnea, insomnia, hypersomnolence disorders and movement disorders associated with sleep like restless leg syndrome. Dr. Rao is rated as an Advanced provider by MediFind in the treatment of Obstructive Sleep Apnea. Her top areas of expertise are Hydrocephalus, Normal Pressure Hydrocephalus, Congenital Cardiovascular Shunt, and Restless Legs Syndrome.

Michael Coppola is a Sleep Medicine specialist and a Pulmonary Medicine provider in Glen Burnie, Maryland. Dr. Coppola is rated as an Advanced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top area of expertise is Obstructive Sleep Apnea.

Sangjin Oh is a Neurologist in Glen Burnie, Maryland. Dr. Oh is rated as an Advanced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Migraine, Memory Loss, Epilepsy, and Relapsing Multiple Sclerosis (RMS). Dr. Oh is currently accepting new patients.

Milan Sanghavi is a Neurologist in Pasadena, Maryland. Dr. Sanghavi is rated as an Advanced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Migraine, Memory Loss, Alzheimer's Disease, and Epilepsy. Dr. Sanghavi is currently accepting new patients.

Amal Isaiah is a Pediatric Otolaryngologist and an Otolaryngologist in Baltimore, Maryland. Dr. Isaiah is rated as a Distinguished provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Obstructive Sleep Apnea, Branchial Cleft Cyst, Enlarged Adenoids, Adenoidectomy, and Endoscopy. Dr. Isaiah is currently accepting new patients.

Steven Scharf is a Sleep Medicine specialist and an Intensive Care Medicine provider in Baltimore, Maryland. Dr. Scharf is rated as a Distinguished provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Obstructive Sleep Apnea, Central Sleep Apnea, Insomnia, Lung Transplant, and Adenoidectomy.

"Pediatric otolaryngologist Jonathan Walsh specializes in head and neck masses, thyroid disorders, vascular malformations, tracheostomy, tracheal stenosis, aerodigestive disorders, chronic ear disease (ear infections), sinus disease (sinusitis), hearing loss, ankyloglossia (tongue-tie), sleep apnea and laryngeal cleft, as well as the full spectrum of pediatric head and neck disorders. He offers minimally invasive endoscopic ear surgery and minimally invasive surgeries of the airway, ear and sinus. Dr. Walsh earned a medical degree from Virginia Commonwealth University School of Medicine and completed residency training in otolaryngology at University of Rochester Medical Center. He served two years of active-duty service as a major in the U.S. Army at Fort Gordon in Georgia, after which he completed fellowship training in pediatric otolaryngology at the University of North Carolina. His research interests are in novel imaging technology applications for head and neck disorders; outcomes and health care disparities; ankyloglossia and lip tie; head and neck masses; and airway imaging and modeling. Dr. Walsh is director of the Johns Hopkins pediatric aerodigestive team and surgical director of the pediatric thyroid team. Additionally, he is an active participant in the vascular anomalies team, fetal therapy multidisciplinary team and pediatric sarcoma tumor board. Dr. Walsh is also the residency program director for the Department of Otolaryngology-Head and Neck Surgery. Videos Meet Our Expert - Dr. Jonathan Walsh Recent News Articles and Media Coverage More babies getting their tongues clipped to help breastfeed. But is it necessary? Today Show (7/11/2019) To Improve Breastfeeding, Babies Get Their Tongues Clipped, Is it Necessary? Podast WYPR (3/19/2019) Snipping an infant's ""tongue tie"" can improve breastfeeding. But is surgery being overused? The Inquirer (3/12/2019) Why so Many Babies are Getting Their Tongues Clipped Atlantic, (3/12/2019) The Tongue Tie Conundrum, Slate (2/6/2018) An Incisionless Approach to Ear Drum Repair, Johns Hopkins Medicine (10/2/2018)". Dr. Walsh is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Tongue Tie, Infant Hearing Loss, Laryngomalacia, Adenoidectomy, and Endoscopy.

Head and neck surgeon David Eisele specializes in surgery for malignant and benign tumors of the head and neck, with a focus on salivary gland neoplasms and disorders of the salivary glands that can be treated surgically. He is an expert in minimally invasive surgical approaches, including sialendoscopy. Salivary gland neoplasms and disorders are also the focus of Dr. Eisele’s research. He has published more than 300 research papers and edited multiple books related to head and neck surgery. Dr. Eisele earned a medical degree from Cornell University Medical College and completed residency training in general surgery and in otolaryngology–head and neck surgery at the University of Washington. From 2012 to 2025, he served as director of the Department of Otolaryngology–Head and Neck Surgery at the Johns Hopkins University School of Medicine. Dr. Eisele is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Salivary Duct Stones, Salivary Gland Tumors, Throat Cancer, Laryngectomy, and Gastrostomy.

Dr. Maria Cecilia Melendres is an assistant professor of pediatrics at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include pediatric pulmonary medicine and pediatric sleep medicine. Dr. Melendres earned her medical degree from the University of the Philippines Manila. She completed residencies at the University of the Philippines and Johns Hopkins. She performed a fellowship in pediatric pulmonary medicine at Johns Hopkins. Dr. Melendres’ research interests include obstructive sleep apnea and narcolepsy. Dr. Melendres is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. Her top areas of expertise are Duchenne Muscular Dystrophy, Cerebral Hypoxia, Obstructive Sleep Apnea, and Central Sleep Apnea.

Dr. Mark Wu specializes in sleep disorders and has a particular interest in narcolepsy, idiopathic hypersomnolence, circadian rhythm disorders, and familial sleepwalking. Dr. Mark Wu received his M.D. and Ph.D. degrees from Baylor College of Medicine in Houston, Texas. After completing his internship at Baylor, he went to UCLA for residency training in Neurology. He then completed a Sleep Medicine fellowship at the University of Pennsylvania. Dr. Wu is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Restless Legs Syndrome, Obstructive Sleep Apnea, Excessive Daytime Sleepiness, and Narcolepsy.

Pediatric otolaryngologist David Tunkel specializes in the treatment of airway disorders in children, including obstructive sleep apnea, congenital or acquired abnormalities of the larynx and trachea, and infections of the upper airway, as well as common infections of the ears, nose and throat. He also treats children who need surgery for chronic otitis media, conductive hearing loss and cholesteatoma, and is nationally known for treating children with special needs, including those with cleft palate, Down syndrome, short-stature skeletal dysplasias and neuromotor diseases. A leader in developing evidence-based guidelines to provide optimal care for children with ear, nose and throat diseases, Dr. Tunkel has conducted research that showed the success of new methods of subtotal tonsillectomy in treating sleep-disordered breathing, with improved recovery for many children. Dr. Tunkel earned his medical degree from the Johns Hopkins University School of Medicine, where he remained for residency training in otolaryngology. He completed fellowship training in pediatric otolaryngology at Children’s National Hospital in Washington, D.C., and served as the director of pediatric otolaryngology at Johns Hopkins for 30 years. He is chair of the Guideline Taskforce for the American Academy of Otolaryngology–Head and Neck Surgery, and was the lead developer for guidelines on tinnitus and nosebleed management. In addition, he is an editorial board member for JAMA Otolaryngology. Dr. Tunkel has served as chair of the Pediatric Otolaryngology Committee of the American Academy of Otolaryngology–Head and Neck Surgery, and was the chairperson of the otolaryngology section of the American Academy of Pediatrics. He has been a board member for the American Society of Pediatric Otolaryngology, and has participated in clinical practice guideline development for major national organizations, recently serving on committees for acute otitis media and the use of tympanostomy tubes. Dr. Tunkel has been recognized by Baltimore magazine as a “Top Doctor,” and has received various accolades, including honor awards from the Maryland Speech-Language-Hearing Association and the American Academy of Otolaryngology–Head and Neck Surgery. Dr. Tunkel is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. His top areas of expertise are Tongue Tie, Otitis Media with Effusion, Otitis, Myringotomy, and Adenoidectomy.

Pediatric otolaryngologist Carolyn Jenks specializes in pediatric hearing loss, cochlear implantation, chronic ear disease including cholesteatoma, dizziness (vestibular disorders), airway disorders, head and neck masses, speech disorders including velopharyngeal insufficiency, sleep apnea and sinusitis. She offers minimally invasive endoscopic surgeries of the sinus, ear and airway. Dr. Jenks earned her medical degree from the Johns Hopkins University School of Medicine. She completed residency training at the University of Pennsylvania in Philadelphia and a fellowship in pediatric otolaryngology at the Northwestern University Feinberg School of Medicine – Lurie Children’s Hospital of Chicago. Among Dr. Jenks’ research interests are pediatric hearing loss, outcomes of cochlear implantation, and vestibular disorders in children. She has published numerous clinical research studies and book chapters, and has spoken nationally and internationally on these subjects. Dr. Jenks is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. Her top areas of expertise are Infant Hearing Loss, Hearing Loss, Stridor, Myringotomy, and Thyroidectomy.

Vasiliki Triantafillou is an Otolaryngologist in Baltimore, Maryland. Dr. Triantafillou is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. Her top areas of expertise are Sinus Cancer, Perichondritis, Sinusitis, Endoscopic Transnasal Transsphenoidal Surgery, and Endoscopy.

Gita Gupta is a Sleep Medicine specialist and a Pediatric Pulmonologist in Baltimore, Maryland. Dr. Gupta is rated as an Experienced provider by MediFind in the treatment of Obstructive Sleep Apnea. Her top areas of expertise are Restless Legs Syndrome, Obstructive Sleep Apnea, Central Sleep Apnea, and Duchenne Muscular Dystrophy.