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Program leadership and core faculty

Thomas Davis, MD

Thomas Davis, MD

Program Director

Thomas Davis, MD, is a 2008 graduate from Drexel University College of Medicine in Philadelphia. He completed his residency in medicine-pediatrics at Geisinger in 2012, where he served as medicine-pediatrics co-chief. He currently serves as director of the comprehensive care clinic. Dr. Davis has been involved in numerous research projects on healthcare transitions and complex care. And he’s received several grants. He is an active member of the Health Care Transition Research Consortium leadership group, working to improve transitions of care nationally and internationally. He also serves on the Medicine-Pediatrics Program Directors Association Transitions Committee. Dr. Davis is passionate about medical education and has completed several medical education immersion courses. When he’s not in the hospital, he enjoys spending time with his family, running, watching Philadelphia sports teams and cooking.

Rose Barham, MD, MS

Associate Program Director

Rose Barham MD, MS, grew up in Northampton, Mass. After attending Skidmore College, she started her career as an organic chemist, but realized it wasn’t the right fit and made her way to the University of Connecticut School of Medicine. She then joined the University of Rochester Medical Center in New York for Med-Peds residency training and stayed for a fifth-year chief residency. She came to Geisinger Medical Center in Danville to continue work at an academic medical center in a rural community. At Geisinger, she works as a hospitalist in internal medicine and pediatrics. She is one of the clerkship directors for internal medicine, as well as the lead for the Med-Peds residency well-being efforts and QI education. Her academic interests include how communication, clinical reasoning and leadership skills impact clinical work. When she’s not working, she likes to make things, primarily in the kitchen, such as pickles, baked goods and a variety of other food.

Michaelyn Tinstman Notz, DO

Michaelyn Tinstman Notz, DO

Associate Program Director

Michaelyn Tinstman Notz, DO, associate program director, is a 2007 graduate of the Philadelphia College of Osteopathic Medicine. She completed her combined internal medicine and pediatric residency at Geisinger Medical Center in 2011. She was the co-chief of the medicine-pediatrics program in 2010–2011 and served as the pediatric chief resident in 2011–2012. She joined Geisinger as faculty in 2012. She is medical director for the Pediatric Complex Care Clinic at Geisinger Medical Center, for children with multiple medical problems and technology dependence. Dr. Notz works as a pediatric hospitalist at Geisinger Janet Weis Children’s Hospital. She is medical director of Pediatric Specialty Day Care, which is a daycare for medically complex pediatric patients. She was also director of osteopathic medical education for Geisinger prior to the AOA/ACGME merger in 2020. Dr. Notz is recognized for her dedication to resident and student teaching. In her free time, she enjoys spending time with her family and friends, exercising, reading and baking.

Alexis Matarangas, MD

Alexis Matarangas, MD

Core Faculty

Alexis Matarangas, MD, was born and raised just outside of Philadelphia, Pa. She earned her bachelor’s degree in neuroscience at Muhlenberg College and subsequently earned her medical degree at Drexel University College of Medicine. She has since completed her Internal Medicine-Pediatrics Residency here at Geisinger Medical Center and has gone on to work as an attending provider in the Adult Comprehensive Care Clinic as well as the Geisinger Milton Clinic. She currently serves as the course director for our Ambulatory Care Rotation and Comprehensive Outpatient Rotation (COR). Her scholarly interests include primary care prevention and health disparity among adults with intellectual and developmental disability. Outside of the clinical, she is an avid Philly sports team fan and loves to travel, hike, garden and craft in her spare time.

Emily Brunner, DO, RhMSUS

Emily Brunner, DO, RhMSUS

Core Faculty

Emily Brunner, DO, RhMSUS, is a dually board-certified adult and pediatric rheumatologist. She completed her medicine-pediatrics training at Geisinger Medical Center. She followed this with fellowship training in both adult and pediatric rheumatology at the University of Pittsburgh Medical Center and The Children’s Hospital of Pittsburgh. She earned certifications in musculoskeletal ultrasound rheumatology from the Ultrasound School of North American Rheumatology. Dr. Brunner is an active participant in the ultrasound workgroup in Childhood Arthritis Rheumatology Research Alliance. She regularly incorporates musculoskeletal ultrasound in the care of both pediatric and adult rheumatology patients. She hopes to establish a young adult clinic to provide care for patients with chronic rheumatic disease. Dr. Brunner enjoys working with trainees of all levels, helping them to achieve academic goals and finding personal fulfillment in medicine. In addition to caring for her patients, Dr. Brunner is most passionate about her family. Dr. Brunner loves spending time with her husband, Rob Brunner, an adult infectious diseases specialist at Geisinger Medical Center, and their two young children. Having grown up in the Adirondack Mountains, Dr. Brunner loves hiking and biking, and she embraces the snow. She loves being physically active and is constantly seeking any excuse to get outside and play.

Marvin Hurley

Marvin "Scottie" Hurley, DO

Core Faculty

Marvin “Scottie” Hurley, DO, earned his medical degree from Edward Via College of Osteopathic Medicine – Virginia. He then completed his medicine-pediatrics residency training at Geisinger in 2020. Dr. Hurley is a primary care physician at Geisinger Berwick. He enjoys working with learners and is especially passionate about primary care medicine.

Andrew Peckham, MD, MPH

Andrew Peckham, MD, MPH

Core Faculty

Andrew Peckham, MD, MPH, earned his medical degree from Oregon Health & Science University in 2015. He then completed his med-peds residency training at University of Rochester Medical Center in 2019. Dr. Peckham is a med-peds hospitalist and the pediatric residency point-of-care ultrasound director at Geisinger. He is passionate about point-of-care ultrasound (POCUS) and teaches a POCUS curriculum for the med-peds, medicine and pediatric residency programs. Additionally, he’s involved with the simulation program for the med-peds residency program. In his free time, he loves to be active in the outdoors, traveling, enjoying international cuisine and most importantly, he loves spending time with his family.

Agnes S. Sundaresan, MD, MPH

Agnes S. Sundaresan, MD, MPH

Core Faculty

Agnes S. Sundaresan, MD, MPH, completed her medical education at Christian Medical College in Vellore, India, and combined medicine-pediatrics residency training at Geisinger. She earned her Master of Public Health at the Johns Hopkins Bloomberg School of Public Health. Dr. Sundaresan directs the monthly medicine-pediatrics resident journal club and helps with the research activities of the program.

Alicia Laskowski

Alicia Laskowski, c-TAGME

Program Administrator

Alicia Laskowski, c-TAGME, is our medicine-pediatrics program administrator and our residents’ biggest advocate. She joined the residency in December 2015 and is a great asset to our team. She started at Geisinger with the general internal medicine clinic in 2008. Outside of work, Ms. Laskowski enjoys baking, gardening, soaking up the sun, campfires (no matter the time of year), adventures with friends and family and most importantly spending time and making memories with her husband and daughter.


Supporting med-peds faculty

Primary care providers

Hospital medicine/pediatric hospitalist providers

Specialty providers

Former med-peds graduates in fellowship training at Geisinger

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