Our Team

Kenneth E. McCalla, M.D., F.A.C.S.

Kenneth E. McCalla

Dr. McCalla joined Siouxland Urology Associates in 1992. He grew up in Laramie, Wyoming, and attended the University of Wyoming, Laramie, Wyoming, where he earned his undergraduate degree. Dr. McCalla completed his medical degree at Creighton University, Omaha, Nebraska, and finished his internship and residency at St. Paul Ramsey Medical Center, St. Paul, Minnesota.


Timothy G. Kneib, M.D., F.A.C.S.

Timothy G. Kneib

Dr. Kneib joined Siouxland Urology Associates in 1998. He grew up in Kansas City, Missouri, and attended the University of Missouri at Kansas City for his undergraduate degree. Dr. Kneib earned his medical degree at the University of Kansas Medical Center, Kansas City, Kansas. He completed his internship and residency in urology at the University of Tennessee, Memphis, Tennessee.


Craig A. Block, M.D., F.A.C.S.

Craig A. Block

Dr. Block joined Siouxland Urology Associates in 2007. He grew up in Sibley, Iowa, and attended the University of Northern Iowa in Cedar Falls, Iowa for his undergraduate degree. Dr. Block completed his medical degree, internship and residency at the University of Iowa, Iowa City, Iowa.


Andrew E. Bourne, M.D., F.A.C.S.

Andrew E. Bourne

Dr. Bourne, joined Siouxland Urology Associates in 2011. He grew up in Sioux City and attended The University of Tulsa, where he earned his undergraduate degree. Dr. Bourne completed his medical degree at the University of Iowa in Iowa City, Iowa. He finished his internship and residency at Southern Illinois University in Springfield, Illinois.


David H. Daniels, M.D.

Daavid H. Daniels

Daniels, a Sioux City, Iowa native, graduated from the University of Notre Dame with a degree in Science in 2004. He received his Doctor of Medicine degree from the University of Iowa in 2009. He recently completed his residency at the Indiana University School of Medicine.


Mary Ann Schultz, PA-C

Mary Ann Schultz

Mary Ann Schultz joined Siouxland Urology Associates in 2007. She grew up in Sioux City, IA and attended the University of Iowa, in Iowa City, IA for her undergraduate degree. She also earned her master's degree as a Physician Assistant at the University of Iowa.


Katie Kassin, PA-C

Katie Schwartz

Katie Kassin joined Siouxland Urology Associates in 2009. She grew up in Colome, South Dakota and attended the University of South Dakota, in Vermillion, SD for her undergraduate degree. She also earned her master's degree as a Physician Assistant at the University of South Dakota.


Luke Sachau, PA-C

Luke Sachau

Luke Sachau, an Allen, Neb. native, graduated from Briar Cliff University with a Bachelor of Science in Biology in 2011. He received his Master of Science in Physician Assistant Studies from the University of Nebraska Medical Center in Omaha, Neb. in 2013.


Patrick Honner, PA-C

Patrick Honner

Patrick Honner joined Siouxland Urology Associates in 2011. He grew up in Yankton, SD and attended South Dakota State University in Brookings, SD for his undergraduate degree.  Then completed his Physician Assistant studies at the University of South Dakota in Vermillion SD.