Hospitals & Medical Centers
Specialized Care
Find a Physician
Patients & Visitors
Community Involvement
About Us
Accountable Care Organization
For Healthcare Professionals
Pay Online
Contact Mercy Health


Residency Programs


Current Residents

Matthew Musielak

Matthew Musielak, MD PGY-5

After obtaining my undergraduate degree from the University of Illinois-Chicago in Biomedical Engineering, I attended Ross University School of Medicine in Portsmouth, Dominica. Currently, I have several research projects in motion involving laparoscopic bands, laparoscopic Roux-en-Y gastric bypass and sleeve gastrectomy. These procedures, and the field of bariatrics, are interests that I plan to pursue at the tenure of my residency when I plan on moving onto a career in private practice.
Amir Aryaie, MD

Amir Aryaie, MD PGY-5

I am from Atlanta, GA. After graduating from the University of Georgia, I went to Ross University for Medical School. I matched into The Jewish Hospital – Mercy Health program in 2010. I like all areas of general surgery; however, I have a special interest in minimal invasive surgery and bariatrics. I just finished research on use of “prophylactic antibiotic to reduce surgical site infection in varicose vein surgeries,” which was presented at SVS in 2011. I am currently working on a research project regarding robotic surgery and its learning curve.
Sepehr Lalezari

Sepehr Lalezari, MD PGY-4

I was born in Tehran, Iran and moved to America when I was four years old. I grew up in Los Angeles, CA, and attained a degree in neuroscience from UCLA. I am very interested in education and thus took a year off to teach high school biology for the Los Angeles Public School System before attending medical school. Although I plan to seek fellowship training in minimally invasive surgery, I hope to always be involved in residency training.
Nathan Roberts

Nathan Roberts, MD PGY-4

I am a native of the Upper Peninsula of Michigan. I received my BA from the Franciscan University of Steubenville in Steubenville, Ohio. After a few years of working various jobs, I earned my MD from St. George University in Granada. Minimally invasive surgery is my greatest area of interest; however, I am open to all aspects of general surgery. Currently, I am working with some of my colleagues on various research projects.
Elizabeth Hartman, MD

Elizabeth Hartman, MD PGY-3

I am a native of Colorado Springs, CO. I attended undergraduate school at Cedarville University and graduated from the University of Cincinnati College of Medicine. I was excited to join The Jewish Hospital – Mercy Health Surgical Residency in 2012. Currently, I am interested in a career in general surgery. In 2005, I spent the year in Shell, Ecuador working in a community hospital. I would love to incorporate international medical aide in my future surgical practice. I am currently involved in a research project evaluating how surgical techniques of pericardial closure affects the post-op complication of atrial fibrillation.

Steven Weber, MD PGY-3

Steven Weber, MD PGY-3

I was born in rural eastern Washington State. I received my Bachelor’s degree in Environmental Health from the University of Washington in Seattle, after which I attended Drexel University College of Medicine in Philadelphia. While I currently plan on becoming a general surgeon upon graduation, however, I am leaving the possibility of fellowship training open. I have several areas of research interest and am currently in the planning stages of a project designed to improve pain control in CABG patients. I also have a case series published in the Journal of Vascular Surgery on early pseudoaneurysms after carotid endarterectomy.

Louis Matherne, MD

Louis Matherne, MD PGY-2

I am originally from New Orleans, LA and graduated from South Alabama in Mobile for my Bachelor’s degree. After living abroad teaching English in Seoul, Korea for 3 years, I attended Ross University for medical school. I spent a year in Brooklyn, New York doing an internship in Internal Medicine. I then moved to Cincinnati to begin my training in General Surgery. I am interested in a career in General Surgery, possibly with an emphasis on robotic surgery.

Mohammad Gerdivisheh, MD

Mohammad Gerdvisheh, MD PGY-2

I graduated from Virginia Commonwealth University with a Bachelors of Science in Biology and minor in Chemistry. I attended Saba University where I obtained my medical degree. My current professional interests include critical care and transplant.

Joshua Ahier, MD

Joshua Ahier, MD PGY-1

I grew up in a small town in Ontario, Canada. Before entering Saba University School of Medicine, I was mentored by a general surgeon in Angola which awakened a new passion for surgery as well as a resolve to be involved in international medical relief as part of my training and practice as a surgeon. In addition, I hope to always have the privilege of working in a teaching hospital since I thrive on the mutual sharing of knowledge.

Casey Reed, MD

Casey Reed, MD PGY-1

I was born and raised right here in Cincinnati, OH. I obtained my Bachelor’s degree in Biomedical Engineering from the University of Cincinnati prior to graduating from The Ohio State University College of Medicine in 2014. After this year I will be completing a residency in Diagnostic Radiology. I feel my time spent in general surgery will establish a strong foundation on which to continue my training.

Alex Shikhman, DO

Alex Shikhman, DO PGY-1

I was born in Moldova, however, I grew up and spent most of my life in Milwaukee, WI. After graduating from the University of Wisconsin-Milwaukee with a degree is radiologic technology, I completed my medical degree at the Chicago College of Osteopathic Medicine. Joining the Jewish Hospital Surgical residency is very exciting and I look forward to developing my breadth of knowledge and skills with the help of my team. Although all aspects of surgery interest me I expect to pursue a fellowship in a yet to be chosen subspecialty.

Derek Zipkin, MD

Derek Zipkin, MD PGY-1

I am a native of Cincinnati, OH. I attended undergraduate school at Indiana University where I studied chemistry. I graduated from University of Cincinnati College of Medicine. I am excited to do my general surgery intern year at The Jewish Hospital. After my time at The Jewish Hospital I will continue my training in Radiology at Case Western/ Metro Hospital in Cleveland, OH

Previous Chief Residents


Benjamin Stivers, MD
General Surgery


Hiral Patel, MD
General Surgery

Ranjodh Singh, MD
Colorectal Fellowship


Ryan Helmick, MD
Critical Care - Baylor
Transplant - Mayo

Farshad Farnejad, MD
Critical Care


Sofiane ElDjouzi, MD
Minimal Invasive Fellowship

Jeffrey Welshhans, MD
General Surgeon


Craig Larson, DO
Cardiothoracic Fellowship

Tobi Reidy, DO
Colorectal Surgeon Fellowship


Timothy Hackett, MD
General Surgeon

Brent Marsden, MD
Vascular Surgeon Fellowship


Rachel Shelton, MD
General Surgeon

Tommy Shelton, MD
General Surgeon


Steven Conkel, MD
General Surgeon


Cari Ogg, MD
General Surgeon

Amit Gogia, MD
General Surgeon


Dasen Ritchey, MD
General Surgeon

Jonathan Ellichman, MD
Cardiothoracic Surgery Fellowship


Jennifer Daniels, MD
General Surgeon

Karen Lawrence, DO
Cardiothoracic Surgery Fellowship


Robert Bradley, MD
General Surgeon


Mark Shapiro, MD
Trauma/Critical Care Fellowship

Nick Dobrilovic, MD
Cardiovascular Thoracic Fellowship


Su Mo Tu We Th Fr Sa