Gastroenterology Fellowship Fellows


MathewsJoshua Mathews, DO

Hometown: Bolingbrook, IL
Undergrad School: Nova Southeastern University
Medical School: Nova Southeastern University
Residency: Garnet Health Medical Center
What drew me to Gastroenterology: ""I fell in love like you would fall asleep; slowly then all at once."" There is no more perfect quote to describe my relationship with gastroenterology. My passion began when I was enrolled in medical school. At that time, I was trying to determine which field of medicine interested me the most and, easily, gastroenterology was my favorite. Over the course of my residency, I had many interesting GI cases that excited me and drove my passion for medicine. I am grateful to be a part of Guthrie's GI fellowship program and hope to take this passion to help as many people as I can! 
What do I like to do in my free time: I really enjoy working out, cooking, traveling, relaxing at home, and definitely enjoy my Netflix binges!

MillerAlexander Miller, MD

Hometown: Titusville, PA
Undergrad School: Penn State University​​​​​​​
Medical School: Sidney Kimmel Medical College at Thomas Jefferson University​​​​​​​
Residency: The Ohio State University​​​​​​​
What drew me to Gastroenterology: Gastroenterology is a broad and interesting field within internal medicine. We have the ability to help diagnose and manage a wide variety of conditions that affect the entire digestive system. We are also directly involved in the workup and treatment of our patients through the ability to perform endoscopic procedures. The combination of the breadth of GI and the ability to scope makes for a great specialty!​​​​​​​
What do I like to do in my free time: Hiking, camping, kayaking, snowboarding, finding new restaurants, relaxing with friends and family


Ravi ShriShri Jai Kirshan Ravi, MD

Research Champion

Hometown: Ghotki, Pakistan
Undergrad School: Islamia Public High School
Medical School: Jinnah Sindh Medical University
Residency: Interfaith Medical Center
What drew me to Gastroenterology: Hearing from my patients during my residency and hospitalist job, " when is my bleeding going to stop? " stimulated me to learn a career of doing scopes and take care of problems. It is an amazing opportunity to get knowledge of taking care of complicated GI pathology. It is very rewarding to see when patients recover from not eating at all to eating regular diet.
What do I like to do in my free time: In my free time, I play games with my best buddies, read online, shopping and talking to my friends and family.

Walsh LeonardLeonard Walsh, MD

Hometown: Scranton, PA
Undergrad School: University of Scranton
Medical School: Geisinger Commonwealth School of Medicine
Residency: Penn State Health Milton S. Hershey Medical Center
What drew me to Gastroenterology: I have a practical engineering background and I find great fulfillment in innovation and seeing the work of my hands. I enjoy challenging hands-on projects as a pastime; and a career in Gastroenterology would grant me the opportunity to work in a technically challenging and intellectually stimulating field of medicine where the products of my hands would not only be fulfilling but lifesaving for my patients.
What do I like to do in my free time: Driving and working on automobiles, construction and restoration projects, practicing Shaolin Hung-Gar and Longfist Kung Fu


Mohammad Yousef, MDMohammad Yousef, MD

Hometown: Dallas, TX
Undergrad School: University of Texas at Arlington
Medical School: Texas Tech University Health Sciences Center
Residency: Ochsner Health System, New Orleans
What drew me to Gastroenterology: Gastroenterology is a beautiful blend of anatomy, physiology, and pathology. It allows me to participate in patient care on multiple levels including both cerebral and procedural and blend the worlds of medicine, oncology, infectious disease, endocrinology, and surgery. Gastroenterology is a culmination of multiple organs working together in a system including the stomach, liver, intestines, gallbladder, and pancreas; all relating to one of my favorite things to do, eating!
What do I like to do in my free time: Traveling, hiking, exploring the outdoors, working on small projects, listening to music, meditation and surrounding myself with good company.

Neeraj Mangla, MDNeeraj Mangla, MD

Hometown: Corpus Christi, TX
Undergrad School: Union College
Medical School: Albany Medical College
Residency: Icahn School of Medicine Mount Sinai at Beth Israel Hospital
What drew me to Gastroenterology: The variety of educational topics, the ability to work with my hands, and make a tangible impact.
What do I like to do in my free time: Staying active, recreational sports, photography, writing, movies.