Dr. Dan CallistoMD
at Integrated Source One — Canton, OH
About
Dr. Dan Callisto co-founded Integrated Source One with Dr. Bernard Bubanic twenty-five years ago. He serves as Partner and Chief Medical Officer at the Canton, Ohio practice. In his CMO role, Dr. Callisto guides the clinical integrity of ISO's DPC+ programs. His career spans the full arc of ISO's growth into a multidisciplinary employer-focused healthcare organization.
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Frequently Asked Questions
Dr. Dan Callisto serves as Partner and Chief Medical Officer at Integrated Source One. He oversees the clinical direction of ISO's DPC+ programs. His role ensures that the care delivered across all delivery models meets ISO's standards for quality and consistency.
Yes. Dr. Callisto co-founded Integrated Source One alongside Dr. Bernard Bubanic twenty-five years ago. He has remained with the organization throughout its growth into a full multidisciplinary DPC+ practice.
Dr. Callisto has been with Integrated Source One since its founding, spanning more than twenty-five years. That tenure gives him deep familiarity with the employer-focused healthcare model ISO has built.
Doctor profile last updated March 23, 2026