Dr. Greenberg has extensive subject matter expertise in RCM, anesthesia operations and practice management. Prior to his role at Ventra Health, he was President and CEO of Anesthesia Care Associates Medical Group, a large independent anesthesia medical practice located in San Francisco, CA in the Sutter Health system. Dr. Greenberg serves in several leadership roles at the American Society of Anesthesiologists, is on the Perioperative Advisory Board of GE HealthCare, and is a practicing cardiothoracic anesthesiologist.

For fun, Dr. Greenberg enjoys trail running and holds a special place in his heart for the coastal mountains of Marin County, CA.

Mark Laperouse, MD, is an Emergency Medicine Strategic Advisor with a strong focus on EM operations and coding. He brings over eight years of experience as Chief Medical Officer at PEPA Emergency Group and currently serves as the Medical Director of a regional medical center emergency department that sees 80,000 visits annually. Dr. Laperouse is actively involved in hospital leadership, contributing to numerous committees, and is a member of the EDPMA EMerging Leaders Academy Class of 2025. A passionate advocate for physician wellness and organizational culture, his guiding principle is simple yet powerful: “If we best serve physicians, they will be happier in their settings to better care for their communities.”

Outside of his professional life, he enjoys running, tennis, pickleball, and travel.

Dr. Jamie Shoemaker is a seasoned Emergency Medicine physician and strategic advisor specializing in reimbursement advocacy. With over 25 years of clinical experience, he is widely recognized as a trusted government advisor who has shaped physician reimbursement policy and legislation at both the federal and state levels. He is currently an Emergency Medicine Partner with Vituity in Elkhart, Indiana. Dr. Shoemaker sits on the board of the American College of Emergency Physicians (ACEP), where he is a fellow and the Vice President of Membership. In 2019, he was selected as one of the inaugural David McKenzie ACEP Reimbursement Fellows, completing an intensive 18-month program addressing all facets of reimbursement, from granular practice details to national policy. He also serves as an appointed member of the RUC (Relative Value Scale Update Committee), a pivotal advisory group to CMS under the American Medical Association.

Dr. Shoemaker earned his MD from Indiana University Indianapolis and completed his Emergency Medicine residency at Western Michigan University. Outside of medicine, Jamie enjoys coffee, craft beer, playing pool, traveling, sharing meals with friends, and spending quality time with his family.

Dr. Saxon earned his AB in Molecular Biology from UC Berkeley and MD from UCLA, completing Radiology training at UCSF. He began his career at OHSU’s Dotter Institute before moving to private practice in San Diego, where he’s practiced for over 25 years. He co-founded the San Diego Cardiac and Vascular Institute and helped develop a leading endovascular stroke treatment program. As CFO of his Radiology group, he has helped oversee major mergers, the development of pioneering reimbursement models, and the stabilization of Radiology services across North County San Diego.

Dr. Saxon loves to ski, hike the outdoors, spend time with his family, mentor younger physicians, and play his mediocre brand of golf with friends.