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William Crevier, MD, is a board-certified internal medicine and pediatrics physician at The Center for Primary Healthcare in Orland Park, Illinois. He is also the president and medical director of the practice and cares for patients of all ages: from infants through adults.

Dr. Cevier grew up in Vermont. He attended the University of California at Berkeley, graduating magna cum laude with a degree in Biochemistry. He received his medical degree from the University of Chicago and completed his residency at Loyola University Medical Center in Maywood, Illinois. He’s an advocate for access to care and served as the founding executive director of two Christian community health centers.

Dr. Crevier sincerely enjoys getting to know his patients. He gives each and every patient the time and attention they deserve in a warm, welcoming atmosphere.

Dr. Crevier maintains his advanced credentials to stay up-to-date with the latest advances in internal medicine. He is board-certified in internal medicine and pediatrics.

He is currently accepting new patients and is excited to welcome them to the practice.

Midwest Respiratory, Ltd., which has offices in Joliet and New Lenox, Illinois, offers comprehensive pulmonary, critical care, and sleep medicine services to patients in the greater Southwest Chicago suburbs. This specialty group has highly qualified staff led by dedicated board-certified physicians with many years of experience serving their communities.

Our goal is to be the leading resource for patient health care needs, from advanced cardiovascular life support and neurointensive ventilator care to managing asthma and successful smoking cessation.

Our team at Midwest Respiratory, Ltd. often diagnoses and treats lung cancer, pleural disease, pneumonia, asthma, chronic obstructive pulmonary disease (COPD), tuberculosis, bronchiectasis, sarcoidosis, and interstitial lung diseases like pulmonary fibrosis.

Extensive onsite pulmonary function testing, including spirometry and oxygen titration, enables patients to receive a fast and accurate diagnosis.

The practice also has advanced technologies to diagnose and stage lung cancer, manage COPD, determine the cause of chronic coughs, shortness of breath, and other breathing problems. These include endobronchial ultrasound (EBUS), endobronchial valve therapy, Ion™ robotic-assisted bronchoscopy, and other advanced bronchoscopic techniques..

Midwest Respiratory, Ltd. also offers in-lab sleep studies at the Midwest Sleep Disorders Center and home sleep studies for patients who may have obstructive or central sleep apnea, insomnia, or other sleep disorders. The providers also evaluate and manage a patient’s oxygen needs.

Patients visiting Midwest Respiratory, Ltd. can be sure of receiving exceptional health care from doctors, advanced practice professionals, and staff trained and certified to provide comprehensive adult respiratory services. Call the nearest office to learn more, or schedule a consultation by completing the online booking form today.

Mohamad Al-Massalkhi, MD, is a critical care and pulmonary medicine physician at Midwest Respiratory Ltd., which has offices in Joliet and New Lenox, Illinois. He is board-certified in critical care medicine, pulmonary disease medicine, sleep medicine, hospice and palliative care medicine, and internal medicine. He has over 30 years of experience working in the medical field.

Dr. Al-Massalkhi completed medical school at Damascus Medical School in Syria in 1991. After relocating to the United States, Dr. Al-Massalkhi completed his internship at Mercy Hospital and Medical Center in Chicago. He then completed fellowships in critical care and pulmonary sleep medicine at Rosalind Franklin University. 

Dr. Al-Massalkhi specializes in treating patients with asthma, COPD, emphysema, lung disease, lung cancer, and sarcoidosis. He also can assist patients with smoking cessation and tobacco use disorder. 

To schedule an appointment with Dr. Al-Massalkhi, call the nearest Midwest Respiratory Ltd. office or request an appointment using the online booking feature today. 

Nischal Raya, MD, is a pulmonary and critical care medicine physician at Midwest Respiratory Ltd., which has offices in Joliet and New Lenox, Illinois. He is board-certified in pulmonary diseases, critical care medicine, and internal medicine. 

Dr. Raya earned his Bachelor of Science at the Ohio State University in Columbus, Ohio, where he graduated magna cum laude in 2011. He then earned his Doctor of Medicine from The University of Toledo, located in Toledo, Ohio. He then went on to complete his internship and fellowships in pulmonary medicine and critical care at RUSH University Medical Center in Chicago. 

To stay up to date with the latest advancements in medicine, Dr. Raya maintains professional memberships with the American Thoracic Society, the Society of Critical Care Medicine, the American College of Physicians, and the American Medical Association.

At Midwest Respiratory Ltd., Dr. Raya treats a wide range of conditions but specializes in treating patients with lung and respiratory issues, like asthma, pneumonia, COPD, emphysema, and complicated chest infections. He also welcomes patients seeking treatment for breathing issues or post-COVID care to schedule an appointment at Midwest Respiratory Ltd.

To schedule an appointment with Dr. Raya, call the nearest Midwest Respiratory Ltd. office or request an appointment online today. 

Philip Leung, MD, is a board-certified pulmonary disease, critical care medicine, and sleep medicine physician at Midwest Respiratory, Ltd., providing complete respiratory care to adults in Joliet and New Lennox, Illinois.

Dr. Leung brings more than 20 years of experience to the practice. He studied at the Li Ka Shing Faculty of Medicine, University of Hong Kong, earning his medical degree.

After graduation, Dr. Leung moved to the United States and completed an internship, residency, and fellowship at Loyola University Medical Center in Maywood, Illinois. He received extensive training in all aspects of pulmonary and sleep disorders.

At Midwest Respiratory, Ltd., Dr. Leung diagnoses and treats a variety of pulmonary and sleep conditions and has special interests in sleep apnea, home noninvasive ventilation, asthma, chronic cough, and narcolepsy.

Dr. Leung speaks English and Chinese fluently. He is a compassionate physician and he works with patients to achieve lasting symptom relief and improve quality of life.

Dr. Leung welcomes anyone experiencing respiratory or sleep issues to schedule an appointment at Midwest Respiratory, Ltd. today.

Diana Doeing, MD, is an internal medicine, pulmonary medicine, and critical care physician at Midwest Respiratory, Ltd., providing high-quality respiratory care to people in Joliet and New Lennox, Illinois.

Dr. Doeing studied at the University of Chicago Pritzker School of Medicine, earning her medical degree. After graduation, she remained at the University of Chicago and completed an internship, a residency, and a fellowship.

At Midwest Respiratory, Ltd., Dr. Doeing diagnoses and treats various respiratory ailments, including emphysema and chronic cough. She has special interests in severe asthma, lung cancer, and advanced bronchoscopy.

Dr. Doeing is a member of several professional organizations, including the Midwest Institute of Robotic Surgery. She also holds staff privileges at Silver Cross Hospital and routinely performs robotic-assisted surgeries to improve respiratory health and quality of life. 

Outside of work, Dr. Doeing is active in the respiratory care community. She regularly participates in continuing education and enjoys attending industry conferences and events. Dr. Doeing welcomes anyone seeking improved respiratory health to Midwest Respiratory, Ltd.

Midwest Respiratory, Ltd., which has offices in Joliet and New Lenox, Illinois, offers comprehensive pulmonary, critical care, and sleep medicine services to patients in the greater Southwest Chicago suburbs. This specialty group has highly qualified staff led by dedicated board-certified physicians with many years of experience serving their communities.

Our goal is to be the leading resource for patient health care needs, from advanced cardiovascular life support and neurointensive ventilator care to managing asthma and successful smoking cessation.

Our team at Midwest Respiratory, Ltd. often diagnoses and treats lung cancer, pleural disease, pneumonia, asthma, chronic obstructive pulmonary disease (COPD), tuberculosis, bronchiectasis, sarcoidosis, and interstitial lung diseases like pulmonary fibrosis.

Extensive onsite pulmonary function testing, including spirometry and oxygen titration, enables patients to receive a fast and accurate diagnosis.

The practice also has advanced technologies to diagnose and stage lung cancer, manage COPD, determine the cause of chronic coughs, shortness of breath, and other breathing problems. These include endobronchial ultrasound (EBUS), endobronchial valve therapy, Ion™ robotic-assisted bronchoscopy, and other advanced bronchoscopic techniques..

Midwest Respiratory, Ltd. also offers in-lab sleep studies at the Midwest Sleep Disorders Center and home sleep studies for patients who may have obstructive or central sleep apnea, insomnia, or other sleep disorders. The providers also evaluate and manage a patient’s oxygen needs.

Patients visiting Midwest Respiratory, Ltd. can be sure of receiving exceptional health care from doctors, advanced practice professionals, and staff trained and certified to provide comprehensive adult respiratory services. Call the nearest office to learn more, or schedule a consultation by completing the online booking form today.