Call Us: 641.494.5200

Physician Directory

World-class healthcare that’s personalized to your needs

You don’t have to drive far to experience advanced, state-of-the-art healthcare that’s focused on your unique needs. What’s more, it’s close to home. Because you deserve the best possible care that’s personalized and convenient.

At Mason City Clinic, we provide the world-class care that you want in a beautiful, relaxed environment. Our friendly, competent staff will warmly welcome you into our practice and answer any questions you might have.

All healthcare services are performed by our well-educated, highly credentialed and experienced physicians using the latest technology and cutting-edge procedures.

Bariatric Surgery

Matthew W. Fabian, DO

Cardiac and Thoracic Surgery

Daniel J. Waters, DO, MA


Muhammad Al Sharif, DO
Byron T. Beasley, MD
Samuel J. Congello, DO
Denisa L. Hagau, MD
Radu Hagau, MD
Brian Olshansky, MD
James T. Reeder, Jr., DO
Michael J. Sarik, DO
Ketan Koranne, MD
Richard R. Rattin, DO

ENT and Allergy

Timothy M. Dettmer, MD
Henry R. Diggelmann, MD
Vishram Jalukar, MD
Phillip C. Lee, MD
Trisha L. Thoma, MD

General Surgery

Abdi Ahari, MD
Harsha U. Jayawardena, MD
Jeffrey K. Rowe, MD
Brittany E. Splittgerber, MD
Matthew W. Fabian, DO

GI/Internal Medicine

Satish K. Sondhi, MD

Shivi S. Siva, MD

Infectious Diseases

Sandra L. Crosara, M.D.

Interventional Pain Management

Ronald F. Kloc, DO


Rajinder K. Verma, MD


Michael W. Crane, MD
Timothy A. Gibbons, MD
Darron M. Jones, MD
Eric J. Potthoff, DO
Richard E. Rattay, MD
Michael B. Scherb, MD

Plastic and Reconstructive Surgery

Mark W. Mulkey, MD
René F. Recinos, MD, PhD


Scott M. Donohoe, DPM
Edward S. Henrich, DPM


Mark E. Lassise, MD
Rogerio M. Ramos, MD


Christopher E. Adams, MD
Timothy L. Mulholland, MD
Kevin R. Rier, MD
Steven P. Thoma, MD

Vascular Surgery

Jeffrey K. Rowe, MD

Please call Mason City Clinic at 641.494.5200 to schedule your personal, one-on-one time with our specialty physicians. 

Our Mission

Why more patients choose Mason City Clinic for all their specialized health needs

World-class care, close to home. That’s what people want. That’s what Mason City Clinic delivers. Mason City Clinic’s well-educated, highly credentialed and experienced physicians bring the latest technology and leading-edge procedures.

During the past 25 years, we have helped hundreds of thousands of people throughout the North Central Iowa region. Many of our doctors have Iowa and local ties to go with outstanding reputations in their respective fields. Each physician is supported by caring, helpful staff.

Patient Reviews

Our patients say it Best

"No more sour grapes about knee pain for me."

“I injured my knee as a teenager and had surgery. Then, as I got older, the pain returned and began affecting my routine and overall enjoyment of life. My doctor referred me to Darron Jones, MD, an orthopedic surgeon. After a thorough exam, he said...
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Welcome to Mason City Clinic

In The Media

Radio Podcasts

Mason City Clinic Physicians discuss a variety of patient medical and health issues with Timothy Flemming on monthly KGLO 1300 AM Radio Show

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TV Segments

See Mason City Clinic specialist physicians and staff and their patients featured in a variety of health and medical television segments.

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News Articles

Read patient testimonials and other news about how Mason City Clinic is impacting the lives of northern Iowans through specialty medical care.

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Video Gallery

Get to know our MCC physicians and providers up close and personal with these informative videos. Learn more about their areas of specialization and the many benefits they bring to their patients in Mason City and beyond.

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