Cardiopulmonary Exercise Testing (CPET)
Request medical records onlineOur Leaders
Our senior leadership team strives to continually achieve our aim of providing better health care - and a better health care system - to every patient we serve.
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Jonathan Nasser MD, MBA
President and Chief Medical Officer, Optum Tri-State
Jonathan Nasser, MD, MBA, is the President and Chief Medical Officer of Optum Tristate. Dr. Nasser is Board Certified in Pediatrics and Internal Medicine. He earned his Medical Degree from the University of Virginia in Charlottesville, VA, and completed his Residency at the University of Rochester Medical Center in Rochester, NY. He holds a Master’s degree in Business Administration from Duke University.
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President and Chief Medical Officer, Optum Tri-State
Jonathan Nasser, MD, MBA, is the President and Chief Medical Officer of Optum Tristate. Dr. Nasser is Board Certified in Pediatrics and Internal Medicine. He earned his Medical Degree from the University of Virginia in Charlottesville, VA, and completed his Residency at the University of Rochester Medical Center in Rochester, NY. He holds a Master’s degree in Business Administration from Duke University.
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Steve Zeng MBA
Chief Financial Officer
Steve Zeng is the Chief Operating Officer, Optum North at Crystal Run Healthcare. Mr. Zeng is a graduate of LeMoyne College in Syracuse, NY where he earned his Bachelor of Science in Accounting. Zeng also holds a Master of Business Administration in Management from the Stern School of Business at New York University.
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Chief Financial Officer
Steve Zeng is the Chief Operating Officer, Optum North at Crystal Run Healthcare. Mr. Zeng is a graduate of LeMoyne College in Syracuse, NY where he earned his Bachelor of Science in Accounting. Zeng also holds a Master of Business Administration in Management from the Stern School of Business at New York University.
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Gregory A. Spencer MD, FACP
Chief Medical Officer & Chief Medical Information Officer
Dr. Gregory A. Spencer is the Chief Medical Officer and Chief Medical Information Officer at Crystal Run Healthcare. Dr. Spencer graduated from the Medical College of Wisconsin (Marquette University) Medical School and completed his residency in Internal Medicine while in the US Air Force at Wilford Hall USAF Medical Center in San Antonio, TX. Dr. Spencer joined Crystal Run as an internist in 1996 and was appointed as Chief Medical Officer and Chief Medical Information Officer in 2008. Dr.
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Chief Medical Officer & Chief Medical Information Officer
Dr. Gregory A. Spencer is the Chief Medical Officer and Chief Medical Information Officer at Crystal Run Healthcare. Dr. Spencer graduated from the Medical College of Wisconsin (Marquette University) Medical School and completed his residency in Internal Medicine while in the US Air Force at Wilford Hall USAF Medical Center in San Antonio, TX. Dr. Spencer joined Crystal Run as an internist in 1996 and was appointed as Chief Medical Officer and Chief Medical Information Officer in 2008. Dr.
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Courtney Welyczko RN, BSN, MBA, CMPE
Vice President Clinical Operations
Courtney Welyczko, RN, BSN, MBA, CMPE is the Vice President of Clinical Operations at Crystal Run Healthcare. Courtney is a graduate of the SUNY Orange Nursing Program where she earned her Associate in Applied Science degree. She earned her Bachelor of Science in Nursing from SUNY New Paltz and is a certified Oncology Nurse. Courtney earned her Master of Business Administration in Health Care Management from the University of Phoenix in Phoenix, AZ.
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Vice President Clinical Operations
Courtney Welyczko, RN, BSN, MBA, CMPE is the Vice President of Clinical Operations at Crystal Run Healthcare. Courtney is a graduate of the SUNY Orange Nursing Program where she earned her Associate in Applied Science degree. She earned her Bachelor of Science in Nursing from SUNY New Paltz and is a certified Oncology Nurse. Courtney earned her Master of Business Administration in Health Care Management from the University of Phoenix in Phoenix, AZ.
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