Pediatric and Adolescent Care

6 East Mountain Avenue
South Williamsport, PA 17702
Phone: (570) 321-1665          Fax: (570) 321-1824


Susquehanna Valley Pediatrics is a private practice established by doctors, Mark Odorizzi, DO and Ralph Kaiser, MD.  Dr. Odorizzi has practiced in the Williamsport area since 1991. Dr. Kaiser is now focusing his career on teaching through The Commonwealth Medical College and is no longer seeing patients at Susquehanna Valley Pediatrics.  Dr. Jessica Osman joined the practice in 2008.

We have a general pediatric practice and provide care for children from birth through adolescence. 

The goal of our practice is to provide high quality professional care in a warm and friendly setting.

Providers and Staff

Office Policies

Financial and Insurance Information

locatioN Map

office map



Williamsport is located in the beautiful Susquehanna Valley of Central Pennsylvania, and is known as the birthplace of Little League Baseball. An outdoors enthusiast will enjoy scenic biking and hiking trails, Rails to Trails, hunting and fishing in our beautiful mountains as well as water sports and golf. Cultural amenities are also close at hand  including the Williamsport Symphony Orchestra, Community Arts Center, and Community Theatre, and numerous College/University sponsored events in the region. This community offers the benefits of big city living in an environment where family life is a priority, real estate is reasonable, neighborhoods are safe and schools are excellent. It is a short drive to NYC, Philadelphia, Baltimore, Washington D.C. and Pittsburgh.

Our city is home to Lycoming College and Pennsylvania College of Technology. Bucknell University, Susquehanna University and Lock Haven University are about 30 minutes away. Mansfield University is 45 minutes north of here. The New York Finger Lakes region is only 2 hours away, and you can reach the Pocono Mountains in 90 minutes .

For additional information contact Susquehanna Valley Pediatrics.

Mark G. Odorizzi, D.O., FAAP, FACOP