Meet the Chartrounds Team

Patricia Harrigan Hardenbergh, MD
Medical Director of Radiation Oncology, Shaw Regional Cancer Center, Edwards Colorado
Chartrounds Founder and Award recipient of the ASCO Conquer Cancer Foundation Improving Cancer Care Grant, funded by Susan G. Komen for the Cure.

Patti attended the combined program of  Dartmouth Medical School, and Brown University Medical School, earning her medical degree in 1991.  She completed her residency in Radiation Oncology in 1996  at Harvard Medical School and subsequently taught and pursued cancer research while on faculty at Duke University Medical Center.  Her career took on new challenges when she moved to a small community practice at Shaw Regional Caner Center in rural Edwards, Colorado.  The experience of straddling the worlds of academic medicine and community practice gave her insight into the need for a bridge between the two.  Emails are welcome at

She has served as a member on ASTRO's Health Services Research Committee with contributions to the published work on national guidelines on Partial Breast Irradiation and Hypofractionated Whole Breast Irradiation and PMRT. She was elected to be the community physician's representative on the nominating committee for the ASTRO Board. She played a major role in the design and development of the partial breast irradiation device now called SAVI.  Dr. Hardenbergh is the author and co-author of over 40 peer-reviewed publications. She presently serves as an examiner for the written and oral boards for the American Board of Radiology and is a Trustee on the American Board of Radiology.

Sherry Yan
Chartrounds China Specialist

Sherry Yan was born in Shanghai, China. She came to the U.S. at a young age. She received her bachelor's degree from M.I.T. and then her M.D. from Columbia University. She developed a keen interest in the field of oncology. This field draws upon her passion for research, love of technology, and immense satisfaction in taking care of cancer patients. She is currently a resident physician in Radiation Oncology at NYU. Through Chartrounds China, she is hoping to facilitate the exchange of knowledge and collaboration between the U.S. and China.




Andy Ball
Program Administrator; CFO; HIPPA CO
Andy has worked in healthcare administration for over 13 years. Doctors respect him for his tenacity and attention to details.  He graduated from Colorado State University in 1987 with a B.A.  After spending 3 years volunteering for Senator Robert Dole and Congressman Ben Nighthorse Campbell, he earned a Masters of Public Administration from the University of Colorado in 1993.  During his years in college and D.C., he always paid his bills as the sous chef in award winning restaurants in each town where he honed skills for cost-effectively implementing the ideas of his employers with the goal of impeccable customer service.  After several years traveling the U.S. as a legal analyst for law firms, Andy chose to settle down at a hospital that was constructing a cancer center.  Upon its opening, he was the Office Supervisor and Revenue Cycle Coordinator for 10 years. His latest goal is to make this grant program a user-friendly and valuable MOC resource to improve cancer care.
  Brigitta Gehl, MPH
Administrator and Research Assistant
Brigitta graduated from the University of Rochester in New York in 2014 where she majored in Molecular Genetics and minor in Developmental Psychology. She went on to complete her Masters in Public Health at George Washington University with a concentration in Global Health, graduating in 2017. Brigitta is currently attending medical school at Frank H Netter MD. School of Medicine at Quinnipiac University and is interested in pursuing a career in Pediatrics.