Andrew Carter is an Interventional Cardiologist and a Cardiologist in Great Falls, Montana. Dr. Carter is rated as an Advanced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Angina, Coronary Heart Disease, Atherosclerosis, Transcatheter Aortic Valve Replacement (TAVR), and Aortic Valve Replacement. Dr. Carter is currently accepting new patients.

Steven Chrzanowski is a primary care provider, practicing in Internal Medicine in Great Falls, Montana. Dr. Chrzanowski is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Glucocorticoid-Remediable Aldosteronism, Hypertension, Familial Hypertension, and High Cholesterol.

Thomas Addison is a primary care provider, practicing in Geriatrics and Internal Medicine in Great Falls, Montana. Dr. Addison is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Idiopathic Edema, Generalized Tonic-Clonic Seizure, Trichohepatoenteric Syndrome, and Anemia. Dr. Addison is currently accepting new patients.

Alrich Gray is a Cardiologist and a Cardiac Electrophysiologist in Great Falls, Montana. Dr. Gray is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Coronary Heart Disease, Arrhythmias, Sick Sinus Syndrome, Cardiac Ablation, and Pacemaker Implantation.

Robert Grasseschi is a Pulmonary Medicine specialist and an Intensive Care Medicine provider in Great Falls, Montana. Dr. Grasseschi is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Lung Metastases, Pulmonary Veno-Occlusive Disease, Bronchogenic Cyst, Gastrostomy, and Endoscopy. Dr. Grasseschi is currently accepting new patients.

Hanna Konarzewska is a Cardiologist and a Cardiac Electrophysiologist in Great Falls, Montana. Dr. Konarzewska has been practicing medicine for over 43 years and is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. Her top areas of expertise are Short QT Syndrome, Postural Orthostatic Tachycardia Syndrome (POTS), Brugada Syndrome, Fainting, and Pacemaker Implantation.

Holly Strong is an Intensive Care Medicine specialist and a Pulmonary Medicine provider in Great Falls, Montana. Dr. Strong is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. Her top areas of expertise are Lung Metastases, Pleurisy, Pleural Effusion, Endoscopy, and Thymectomy. Dr. Strong is currently accepting new patients.

Merhala Balasubramaniam is a Pulmonary Medicine provider in Great Falls, Montana. Dr. Balasubramaniam is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. Her top areas of expertise are Lung Metastases, Chronic Obstructive Pulmonary Disease (COPD), Pulmonary Veno-Occlusive Disease, and Long Haul COVID.

Gabor Varju is a Pulmonary Medicine specialist and a Sleep Medicine provider in Great Falls, Montana. Dr. Varju is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Lung Metastases, Chronic Obstructive Pulmonary Disease (COPD), Asthma, and Asthma in Children. Dr. Varju is currently accepting new patients.

Kathleen Blair is a primary care provider, practicing in Internal Medicine in Great Falls, Montana. Dr. Blair is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. Her top areas of expertise are Shingles, Diabetic Neuropathy, Obesity in Children, and Urinary Incontinence. Dr. Blair is currently accepting new patients.

Daniel Gordon is a primary care provider, practicing in Family Medicine in Great Falls, Montana. Dr. Gordon is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Lung Cancer, Alzheimer's Disease, Orthostatic Hypotension, and Relapsing Multiple Sclerosis (RMS). Dr. Gordon is currently accepting new patients.

Kimberly Atianzar is an Interventional Cardiologist and a Cardiologist in Great Falls, Montana. Dr. Atianzar is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. Her top areas of expertise are Mitral Valve Regurgitation, Aortic Valve Stenosis, Mitral Stenosis, Aortic Valve Replacement, and Transcatheter Aortic Valve Replacement (TAVR).

Victor Bonilla is a Cardiologist in Great Falls, Montana. Dr. Bonilla is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are High Cholesterol, Sengers Syndrome, Atrial Fibrillation, and Hypertension.

Randolph Hutter is a Cardiologist in Great Falls, Montana. Dr. Hutter is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Atherosclerosis, Coronary Heart Disease, Angina, Atrial Fibrillation, and Pacemaker Implantation.

Steven Mast is an Interventional Cardiologist and a Cardiologist in Great Falls, Montana. Dr. Mast is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Heart Attack, Angina, Coronary Heart Disease, Pacemaker Implantation, and Heart Bypass Surgery. Dr. Mast is currently accepting new patients.

Dr. Sisk is an experienced pulmonologist who has provided pulmonary care since 2018. Dr. Sisk has a special interest in bridging urban and rural healthcare access. In 2004, Dr. Sisk earned her Bachelor’s of Science in Biology from Missouri Western State University. Dr. Sisk graduated with her Doctor of Osteopathy in 2011 from Kansas City University of Medicine. Dr. Sisk completed her Pulmonary Critical Care Fellowship in 2018. She continued her education with a Masters of Healthcare Administration from Virginia Commonwealth University in 2019. After completing her medical degree, Dr. Sisk worked as a nocturnal hospitalist. Dr. Sisk has participated in many medical missions in developing countries to establish and provide care in rural communities. Before joining the Great Falls Clinic team, she was a pulmonary/critical care physician in Colorado, a physician assistant program instructor and a medical director for a nonprofit located in Mozambique, Africa. In her spare time, Dr. Sisk enjoys spending time in nature including hiking, camping, fishing and exploring, always with a canine sidekick. She loves international travel, hosting friends and family for good food and golf. Dr. Sisk is rated as an Advanced provider by MediFind in the treatment of Pulmonary Hypertension. Her top areas of expertise are Lung Metastases, Pulmonary Veno-Occlusive Disease, Interstitial Lung Disease, and Pulmonary Hypertension.

Dr. Ritchie offers the full complement of cardiology services including arterial catheterization; temporary pacemakers; conventional and stress echocardiography, transesophageal echocardiography as well as exercise and pharmacologic stress testing. He also brings his expertise in all aspects of coronary angioplasty, including structural heart disease such as closure of atrial septal defects, balloon valvuloplasties; and peripheral angiography (AAA endovascular stent grafts, renal artery stents), DCA, rotablator, brachytherapy, IVUS and physiologic lesion assessment. Dr. Ritchie is board certified in Internal Medicine, Cardiovascular Diseases and Interventional Cardiology. Dr. Ritchie completed his undergraduate work at the University of Evansville, where he played baseball for three years. He attended medical school at Indiana University, where he graduated with highest honors in 1986. He then went on to complete his residency at Case Western Reserve School of Medicine in Cleveland in 1989. From there, he went on to complete his fellowship at Washington University in Saint Louis, where he performed clinical rotations while receiving interventional training. In his spare time Dr. Ritchie enjoys hiking, fishing, hunting, biking and spending time with friends and family. Dr. Ritchie is rated as an Advanced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Atrial Septal Defect (ASD), Patent Foramen Ovale, Unstable Angina, Carotid Artery Disease, and Pacemaker Implantation.

John Mazur is a Pulmonary Medicine provider in Great Falls, Montana. Dr. Mazur has been practicing medicine for over 39 years and is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Lung Metastases, Sarcoidosis, Atypical Pneumonia, Hospital-Acquired Pneumonia, and Advanced Bronchoscopy.

Dr. Jorge (pronounced “George”) Castriz is a board certified interventional cardiologist. Dr. Castriz offers the full complement of cardiology services including arterial catheterization, biventricular pacing, temporary pacemakers, conventional and stress echocardiography as well as exercise and pharmacologic stress testing. He also brings his expertise in all aspects of peripheral angiography and coronary angioplasty (AAA endovascular stent grafts, renal artery stents, angioplasty, DCA, rotablator, brachytherapy, IVUS and physiologic lesion assessment). Dr. Castriz is board certified in Internal Medicine, Cardiovascular Diseases and Interventional Cardiology and is a fellow of the American College of Cardiology. Prior to joining the Great Falls Clinic in 2013, Dr. Castriz maintained an active practice with the Cardiovascular Medical Specialists of the Palm Beaches in Jupiter, Florida. Prior to that, Dr. Castriz owned a private practice in Palm Beach Gardens, Florida for nine years. Dr. Castriz received his medical degree from the University Central Del Este in the Dominican Republic. He completed his internship and residency in Internal Medicine, and his fellowship in Interventional Cardiology at the University of Oklahoma Health Science Center in Oklahoma City, OK. Dr. Castriz is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Angina, Coronary Heart Disease, Heart Attack, Metabolic Syndrome, and Pacemaker Implantation.

Shawn Kelly is an Interventional Cardiologist and a Cardiologist in Great Falls, Montana. Dr. Kelly is rated as an Experienced provider by MediFind in the treatment of Pulmonary Hypertension. His top areas of expertise are Angina, Coronary Heart Disease, Atherosclerosis, Angioplasty, and Atherectomy.