Sienna Wellness Institute. Robert L. Gross, DO. Gary A. Finstad, MD. James D. Gutzman, PA. Sienna Wellness Institute is here to provide personalized, high-quality services where your healthcare needs are our #1 priority. Since 2006 we have worked hard to create a practice that we are proud of and our community trusts. Sienna Podiatry.Home‧Diabetic Foot Care‧The Importance of Exercise‧The Dangers of Stress‧Podiatry‧Sliding Scale.