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William Crevier, MD, is the Medical Director at The Center for Primary Healthcare in Orland Park, Illinois. He has practiced internal medicine and pediatrics for over three deacdes and cares for patients of all ages: from infants through adults. He maintains his board certification in internal medicine.

Dr. Crevier 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. 

Dr. Crevier has welcomed his partner, Carol Crevier to join him as a Family Nurse Practitioner. Carol is known by many of the CPHC patients from her time as a nurse and administrator within his practice. Dr. Crevier also frequently has medical students shadow him for a day.

Saron Sine has also joined Dr. Crevier as an intern. She sees patients part time and manages the remote care that CPCH provides.  Saron is studying to enter a residency program in July, 2028. 

The Creviers are currently accepting new patients and are excited to welcome them to the practice.

Michael Favila, DO, is a board-certified family medicine physician on the team at Health Solutions. He provides comprehensive care for patients at the practice’s convenient offices in Tinley Park, Illinois, and in Munster, Indiana.  

Dr. Favila completed his undergraduate studies at Indiana University in Bloomington, earning his Bachelor of Science in microbiology. He went on to earn his Doctor of Osteopathic Medicine from Chicago College of Osteopathic Medicine in Downers Grove, Illinois, graduating in 2017. 

Following medical school, Dr. Favila completed his residency in family medicine at Franciscan Health Olympia Fields. He was named Family Medicine Chief Resident in his final year. 

At Health Solutions, Dr. Favila provides the full scope of family medicine services, including annual physical exams and the management of conditions such as diabetes, high blood pressure, and high cholesterol. In addition to being certified by the American Board of Family Medicine, Dr. Favila holds a PCSS Medications for Addiction Treatment (MAT) Certification to help patients who are suffering from substance use disorder.

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. 

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. 

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.

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.

Samer Kassar, MD, is a board-certified neurologist and the lead practitioner at Midwest Neurology Associates, P.C. in Dyer, Indiana. In addition to patient care, Dr. Kassar uses his medical expertise to act as a leader, guide, and educator for the staff. His range of medical knowledge contributes greatly to the breadth of services offered at Midwest Neurology Associates, from routine diagnosis to neurological critical care.

Born in Damascus, Syria, Dr. Kassar received his Doctor of Medicine from the University of Damascus School of Medicine, graduating with honors at the top of his class. He then relocated to the US and completed his residency at Saint Louis University, School of Medicine in St. Louis, Missouri.

Following his residency, Dr. Kassar worked as an internal medicine hospitalist at Heartland Regional Medical Center in Marion, Illinois, as well as an emergency room physician at the VA Medical Center, also in Marion. After working for a few years, Dr. Kassar decided he wanted to focus on neurology and completed his neurology residency at the Medical College of Georgia in Augusta, Georgia.

Dedicated to his career, Dr. Kassar has conducted extensive research and participated in many conferences. He’s also active within his professional community, acting as an interpreter and translator for Arabic to English and vice versa in a number of international medical conferences. Dr. Kassar previously trained physicians in Syria and provided medical care in and around Damascus to the underprivileged.

When he isn’t focused on helping change his patient’s lives, Dr. Kassar enjoys playing and watching soccer and traveling around the world. Continuous learning is Dr. Kasser’s personal mission, and he’s always looking for the latest and greatest techniques from medical practitioners around the world that would benefit his patients.