Nathaniel Weathington, MD, PhD, specializes in pulmonology and is certified in internal medicine, pulmonary disease, and critical care medicine by the American Board of Internal Medicine. He practices at UPMC Somerset, UPMC St. Margaret, and UPMC Bedford. Dr. Weathington is affiliated with Pulmonary Consultants - UPMC. He completed his medical degree at the University of Alabama School of Medicine at Birmingham. Dr. Weathington is rated as an Advanced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Pneumonia, Asthma, Cerebral Hypoxia, and Lung Metastases.

Dr. Tsai graduated cum laude from the Georgetown University School of Medicine in Washington, D.C. He completed his residency at the University of Michigan Medical School in Ann Arbor and his pulmonary critical care medicine fellowship at UPMC. He is board-certified in pulmonary disease, critical care medicine, and sleep medicine. Dr. Tsai specializes in pulmonology, critical care medicine, chronic obstructive pulmonary disease (COPD), asthma, sleep disorders, and interstitial lung disease. Dr. Tsai is chairman of the COPD task force and director of the Center for Sleep Disorders at UPMC St. Margaret. He is a member of the American College of Chest Physicians, American Academy of Sleep Medicine, and Alpha Omega Alpha Medical Honor Society. Dr. Tsai’s COPD team was honored by the Jewish Healthcare Foundation of Pittsburgh and the Fine Foundation, with silver (2009) and gold (2011) Fine Awards for Teamwork Excellence in Health Care for work in reducing hospital readmissions for COPD. Dr. Tsai is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Obstructive Sleep Apnea, Lung Metastases, Drowsiness, and Excessive Daytime Sleepiness.

Dr. Brehm received his medical degree from the Ohio State University in Columbus. He completed his internal medicine residency at the Northwestern University Feinberg School of Medicine in Chicago. Dr. Brehm completed the Harvard Combined Pulmonary and Critical Care fellowship at Massachusetts General Hospital, Beth Israel Deaconess Medical Center, and Brigham and Women’s Hospital in Boston. He also obtained a Master of  Public Health from the Harvard University School of Public Health in Boston. He is board-certified in pulmonary medicine and critical care medicine. Dr. Brehm is section chief of Pulmonary and Critical Care Medicine at UPMC St. Margaret and medical director of the Intensive Care Unit at UPMC St. Margaret. Dr. Brehm is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Asthma, Asthma in Children, Chronic Obstructive Pulmonary Disease (COPD), and Lung Metastases.

"Dr. Raffensperger received his medical degree from the University of Pittsburgh School of Medicine. He completed his internal medicine residency and his pulmonary/critical care medicine fellowship at UPMC Presbyterian. He remained there as assistant professor of medicine and director of Section of Interstitial Lung Disease. Dr. Raffensperger is board-certified in pulmonary disease, internal medicine, and critical care medicine. For eight years, during 2011 to 2021, he was named a “Pittsburgh Magazine” ""Top Doctor"" in Pulmonary Medicine and Critical Care Medicine. Dr. Raffensperger specializes in internal medicine, pulmonology, critical care medicine, chronic obstructive pulmonary disease (COPD), asthma, sleep disorders, and interstitial lung disease.". Dr. Raffensperger is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Pulmonary Fibrosis, Lung Metastases, Cerebral Hypoxia, and Chronic Obstructive Pulmonary Disease (COPD).

Heather Hanzlik, MD, specializes in internal medicine and is certified by the American Board of Internal Medicine. She practices at Natrona Heights Medical Associates-UPMC and is affiliated with UPMC St. Margaret. She completed her medical degree at Temple University School of Medicine and residency at Allegheny General Hospital Robert Wood Program. Dr. Hanzlik is rated as an Experienced provider by MediFind in the treatment of Pneumonia. Her top areas of expertise are Hypothyroidism, Obesity in Children, Glucose Phosphate Isomerase Deficiency, and Glucose-Galactose Malabsorption Deficiency.

Dominick DeFrances, DO, specializes in internal medicine and is certified by the American Board of Internal Medicine. He practices at Natrona Heights Medical Associates-UPMC and is affiliated with UPMC St. Margaret. He completed his medical degree at Philadelphia College of Osteopathic Medicine. Dr. Defrances is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Glucose-Galactose Malabsorption Deficiency, Glucose Phosphate Isomerase Deficiency, Congenital Sucrase-Isomaltase Deficiency, and Pneumonia.

David Shin is a primary care provider, practicing in Internal Medicine in Natrona Heights, Pennsylvania. Dr. Shin is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Transient Familial Hyperbilirubinemia, Thyroid Dysgenesis, Congenital Hypothyroidism, Colonoscopy, and Endoscopy.

Elie Francis is a primary care provider, practicing in Internal Medicine in Natrona Heights, Pennsylvania. Dr. Francis is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Hypertension, Familial Combined Hyperlipidemia, and Hip Replacement.

Surinder Bajwa is a primary care provider, practicing in Internal Medicine in New Kensington, Pennsylvania. Dr. Bajwa is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Breast Cancer, Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, Gastrostomy, and Hip Replacement.

Nagib Manov, MD, specializes in geriatric medicine and is board-certified in internal medicine and geriatric medicine by the American Board of Internal Medicine. He is affiliated with UPMC St. Margaret. Dr. Manov completed his fellowship at UPMC St. Margaret Memorial Hospital, residency at Easton Hospital and medical degree at University of Sarajevo. Dr. Manov is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Dementia, Swallowing Difficulty, Painful Swallowing, and Alzheimer's Disease.

David Yuan, MD, MS, is a family medicine and geriatric physician, dual-certified by the American Board of Family Medicine. He is the director for the UPMC St. Margaret Geriatric Fellowship Program. Dr. Yuan received his medical degree from Jefferson Medical College and completed his residency at Chestnut Hill Family Practice. He completed his fellowships in geriatrics and faculty development at UPMC and completed a Master of  Medical Education at the University of Pittsburgh. Dr. Yuan’s clinical interests include health care for the older population in the community and educating learners in geriatrics. He is a member of the American Academy of Family Physicians, American Geriatrics Society, Pennsylvania Medical Society. Dr. Yuan is membership chair of the Pennsylvania Geriatrics Society - Western Division. Dr. Yuan lives in Point Breeze, near Pittsburgh, with his wife and two daughters. He is an avid runner and enjoys playing soccer. View the full list of Dr. Yuan’s publications on PubMed. Dr. Yuan is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Alzheimer's Disease, Dementia, Delirium, and Peripheral Artery Disease.

William Bain is a Pulmonary Medicine specialist and an Intensive Care Medicine provider in Monroeville, Pennsylvania. Dr. Bain is rated as a Distinguished provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Acute Respiratory Distress Syndrome (ARDS), Pneumonia, COVID-19, and Pseudomonas Stutzeri Infections.

Danny Palmieri is a primary care provider, practicing in Internal Medicine in Leechburg, Pennsylvania. Dr. Palmieri is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Hypertension, Familial Hypertension, and Vitamin B12 Deficiency Anemia.

Joseph Martinez is a primary care provider, practicing in Family Medicine in Leechburg, Pennsylvania. Dr. Martinez is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Hypertension, Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, and Maturity Onset Diabetes of the Young.

Alfred Burgo is a primary care provider, practicing in Internal Medicine in Leechburg, Pennsylvania. Dr. Burgo is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Down Syndrome, Glucocorticoid-Remediable Aldosteronism, Familial Hypertension, and Hypertension.

Marina Rezk is a primary care provider, practicing in Internal Medicine in Leechburg, Pennsylvania. Dr. Rezk is rated as an Experienced provider by MediFind in the treatment of Pneumonia. Her top areas of expertise are Type 2 Diabetes (T2D), Gitelman Syndrome, Low Potassium Level, and Maturity Onset Diabetes of the Young.

Chad Shaffer is a primary care provider, practicing in Family Medicine and Internal Medicine in Leechburg, Pennsylvania. Dr. Shaffer is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Diabetic Nephropathy, Sitosterolemia, Glucocorticoid-Remediable Aldosteronism, and Hypertension.

Thomas Litz is a primary care provider, practicing in Internal Medicine in Leechburg, Pennsylvania. Dr. Litz is rated as an Experienced provider by MediFind in the treatment of Pneumonia. His top areas of expertise are Cerebral Hypoxia, Low Potassium Level, Gitelman Syndrome, and Hospital-Acquired Pneumonia.

Vicky Leo is a primary care provider, practicing in Internal Medicine in Leechburg, Pennsylvania. Dr. Leo is rated as an Experienced provider by MediFind in the treatment of Pneumonia. Her top areas of expertise are Sitosterolemia, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension.

Denise Swidwa is a Pulmonary Medicine provider in Cheswick, Pennsylvania. Dr. Swidwa is rated as an Experienced provider by MediFind in the treatment of Pneumonia. Her top areas of expertise are Neurosarcoidosis, Sarcoidosis, Chronic Obstructive Pulmonary Disease (COPD), and Lung Metastases.