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Meet the Physicians and Physician Assistants of DPSC

A trusted clinical team with experience, expertise, and compassion

The physicians at DPSC are all board certified in Internal Medicine and Pulmonary Diseases. They are all Fellows of the American College of Chest Physicians. Some members of the group have additional board certifications in Sleep Medicine and Critical Care Medicine. They are all active members of the medical staffs at Banner Desert Medical Center, Banner Baywood Medical Center and Banner Heart Hospital.
Our physician assistants are all certified and maintain their certification through rigorous ongoing continuing medical education.
Specialty – Chest Diseases and Sleep Disorders
Dr. Gill completed medical school at Dayanand Medical College in India. He then completed his internal medicine residency at Grant Hospital of Chicago (Rush University) in Chicago, Illinois followed by a dual fellowship in pulmonary medicine and critical care medicine at St. Elizabeth’s Medical Center (Tufts University School of Medicine) in Boston, Massachusetts. Dr. Gill joined Desert Pulmonary Consultants in 1997 and practices both pulmonary and sleep medicine. He is the Medical Director of the Banner Baywood Sleep Center and has served as the Chairman of the Respiratory Care Committee at Banner Baywood Medical Center in Mesa, Arizona. He is board certified in internal medicine, pulmonary disease, critical care medicine and sleep medicine. Dr. Gill sees both pulmonary and sleep disorder patients. He has been named a Phoenix Magazine Top Doc in 2015, 2016 and 2017.
Specialty – Chest Diseases
Dr. Bohan completed medical school at the University of Arizona in Tucson, Arizona and completed both her internal medicine residency and fellowship in pulmonary disease at Banner Good Samaritan Medical Center in Phoenix, Arizona. She joined Desert Pulmonary Consultants in 2000. She is board certified in internal medicine and pulmonary disease. Her practice focuses on treatment of pulmonary disease.
Specialty – Chest Diseases and Sleep Disorders
Dr. Ahmed completed medical school at Gandhi Medical College at Osmania University in India. He completed his residency training at the University of Medicine and Dentistry-Internal Medicine residency program in Newark, New Jersey. Dr. Ahmed then completed a fellowship specializing in pulmonary medicine at Brookdale University Medical Center in Brooklyn, New York and a fellowship specializing in critical care medicine at the University of New Mexico Health Sciences Center in Albuquerque, New Mexico. He joined Desert Pulmonary & Sleep Consultants in 2002. Dr. Ahmed has served as Chairman of Medicine at Banner Desert Medical Center in Mesa, Arizona, and is an adjunct professor of medicine at Midwestern University in Glendale, Arizona. He is board certified in internal medicine, pulmonary disease, critical care medicine and sleep medicine. His practice encompasses all aspects of the diagnosis and treatment of pulmonary and sleep disorders. In addition, he is the Medical Director of Valley Sleep Center in Mesa and Chandler.
ian profile

Ian Pieroni, PA-C earned his Master of Physician Assistant Studies from Northern Arizona University, graduating with distinction. Before becoming a physician assistant, he served nearly a decade as a Fire Captain in the United States Air Force.

Ian specializes in pulmonary and sleep medicine, providing comprehensive evaluation and management of a wide range of respiratory and sleep disorders. He is dedicated to delivering compassionate, evidence-based care and believes in helping patients understand their diagnoses and treatment options, empowering them to take an active role in their health.

img Rebecca

Rebecca is a Family Nurse Practitioner at Desert Pulmonary & Sleep Consultants, providing compassionate, patient-centered care for individuals with pulmonary and sleep-related conditions.

She has been in healthcare since 2003 and brings extensive clinical experience across multiple care settings. Since 2008, she has worked as a registered nurse in ICU and CVICU, caring for patients with complex and critical conditions. Her background also includes hospital medicine, surgical recovery, cancer care, and pulmonary and cardiac rehabilitation, as well as experience caring for some patients with sleep disorders through her work as a registered nurse.

During her time in pulmonary rehabilitation, Rebecca developed a strong connection to pulmonary patients and a passion for managing respiratory disease in the outpatient setting. She places a strong emphasis on patient education, believing that informed patients are better equipped to manage chronic conditions, improve outcomes, and enhance quality of life. Her philosophy of care centers on collaboration, clear communication, and evidence-based practice tailored to each patient’s individual needs.

Rebecca graduated from Grand Canyon University and is a member of the American Association of Nurse Practitioners. She is committed to delivering high-quality, compassionate care focused on long-term health and patient well-being.

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