Our Providers

Ubair Ahmed, MD, FCCP, FACP

Ubair Ahmed, MD, obtained his Medical Doctoral Degree from the Dow Medical College, University of Karachi, Karachi, Pakistan. Dr. Ahmed performed his internship at Dow Medical College Civil Hospital and completed his residency at the Harlem Hospital Center, College of Physicians and Surgeons-Columbia University, New York, New York, and completed fellowship training in Pulmonary Medicine at Harlem Hospital Center and Critical Care Medicine at Montefior Medical Center, New York, New York.

Dr. Ahmed is certified by the American Board of Internal Medicine in Sleep Medicine, Internal Medicine, Pulmonary Disease, and Critical Care Medicine. Areas of interest and treatment include:

  • Advanced Sleep Phase Syndrome
  • Control Of Respiration During Sleep
  • Delayed Sleep Phase Syndrome
  • Excessive Daytime Sleepiness
  • MSLT (Sleep Disorders)
  • Multiple Sleep Latency Test/MSLT
  • Obstructive Sleep Apnea
  • Pulmonary Critical Care Medicine
  • Pulmonology
  • Sleep & Snoring Disorders
  • Sleep Apnea
  • Sleep Disordered Breathing
  • Sleep Disorders
  • Sleep Medicine

Neil Clements, Jr., MD, FCCP

Neil Clements, MD, is certified by the American Board of Internal Medicine and is certified in Pulmonary Medicine.

A graduate of Sabino High School in Tucson, Arizona, Dr. Clements holds an undergraduate degree in Biology from Hamilton College, Clinton, New York; completed graduate studies in Biochemistry from the University of Louisville; and a Medical Doctoral Degree from the University of Louisville. Dr. Clements continued his postdoctoral education with fellowship training in Geriatrics and Pulmonary/Critical Care Medicine from the University of Arizona, as well as PGY I-III in Internal Medicine.

Dr. Clements serves as the Co-Director of Respiratory Care, the Director of the Neurologic ICU, and Chief of the Pulmonary Division at St. Joseph’s Hospital. Dr. Clements is a member of the Pima County Medical Society, the American College of Chest Physicians, and the American Thoracic Society.

 

Khaled Hadeli, MD, FCCP

Khaled Hadeli, MD is Board Certified/Eligible in Internal Medicine/Pulmonary/Critical Care Medicine.

Dr. Hadeli graduated from Tripoli University Medical School in 1990. He completed a residency in Internal Medicine in 1998 and a Fellowship in Pulmonary and Critical Care Medicine in 2000 at the University of Arizona Health Sciences Center. Dr. Hadeli joined the faculty of The University of Arizona as Clinical Assistant Professor of Medicine for three years before joining Tucson Pulmonology in October of 2002.

Dr. Hadeli’s interests are in general Pulmonary and Critical Care Medicine. He is a Fellow of the American College of Chest Physicians and was listed in America’s Top Physicians 2003.

YuYa Huang, MD, FCCP

YuYa “John” Huang, MD, attended the University of Illinois obtaining an undergraduate degree in Biology and a post-graduate degree in Biological Sciences. Dr. Huang continued his education obtaining his Medical Doctoral degree at SABA University, Netherlands Antilles, with internship and residency at The Brody School of Medicine in Greenville, North Carolina. Dr. Huang completed fellowship training in Pulmonary Medicine and Pulmonary Critical Care Medicine.

Dr. Huang holds certifications from the American Board of Internal Medicine in Internal, Pulmonary, and Critical Care Medicine, and is certified by the United Council for Neurologic Subspecialties in Neurocritcal Care.

Dr. Huang is multilingual speaking Mandarin, Taiwanese, and English.

Dr. Huang is taking new patients and sees patients at both the east and west side offices.

Antara Mallampalli, MD, FCCP

Antara Mallampalli, MD, earned her Bachelor of Science in Biomedical Engineering from Johns Hopkins University in Baltimore, Maryland, and earned her Medical Doctor degree at Northwestern University Medical School in Chicago. After medical school, Dr. Mallampalli completed her internship and residency in Internal Medicine at Baylor College of Medicine in Houston, Texas, and also completed fellowship training in Pulmonary and Critical Care Medicine at Baylor.

Dr. Mallampalli is board certified in Internal, Pulmonary, Critical Care, and Sleep Medicine (ABIM). Dr. Mallampalli is a Fellow of the American College of Chest Physicians and a member of both the American Thoracic Society and the Society of Critical Care Medicine.

Clinical interests include general pulmonary, critical care, sleep medicine, and chest infections.

Sunil Natrajan, MD, FCCP

Sunil Natrajan, MD, is certified by the American Board of Pulmonary Medicine.

Dr. Natrajan holds an undergraduate degree in Biology from Boston University, Boston, MA., and obtained his Medical Doctoral Degree from Hahnemann University School of Medicine in Philadelphia, PA. Dr. Natrajan performed residency training in Internal Medicine at Hahnemann University for three-years and was Chief Resident for one year; Fellowship completed in Pulmonary and Critical Care Medicine at the University of Arizona.

Dr. Natrajan is a member of the American College of Physicians; the American College of Chest Physicians; the American Thoracic Society; and Alpha Omega Alpha.

Christopher Neal, FNP

Christopher completed his Master’s Degree in Nursing, Family Nurse Practitioner (FNP), through Grand Canyon University. Christopher has extensive experience in cardiovascular intensive care unit registered nurse and is nationally certified by the American Academy of Nurse Practitioners. Christopher is seeing patients of Dr. John Huang and Dr. Sunil Natrajan and is taking appointments at both the east and west offices.

 

Michelle Waters, FNP

Michelle completed her Master’s Degree in Nursing, Family Nurse Practitioner (FNP), through Frontier Nursing University. She has eight years of experience as an intensive care unit registered nurse and is nationally certified by the American Academy of Nurse Practitioners. She is a member of Sigma Theta Tau International, the American Academy of Nurse Practitioners, and the Southern Arizona Advanced Practitioner Society. Michelle is seeing patients of Dr. Ubair Ahmed and is taking appointments at both the east and west offices.

Wren Winston, FNP

Wren Winston, FNP is nationally certified as a Family Nurse Practitioner through the American Academy of Nurse Practitioners. She completed her Master of Science in Nursing (MSN, FNP) through Grand Canyon University. She is also a certified emergency nurse (CEN) with experience in acute care, emergency, and cardiovascular nursing. She is a member of the American College of Chest Physicians, the American Academy of Nurse Practitioners, the Southern Arizona Advance Practice Nurse/Nurse Practitioner Society, and the Emergency Nurses Association. She is dedicated to working closely with patients to optimize their health. Her patients appreciate her ability to listen and work with them as a health partner.