Program Leadership

Rebecca Rothstein, DO, FAAP 

Program Director
Pediatric Hospitalist, Peyton Manning Children’s Hospital
Pediatric Hospitalist

She/Her/Hers

I was born and raised in NJ and then transplanted to the Midwest. I attended Bryn Mawr in Bryn Mawr, Pennsylvania where I graduated Cum Laude with an Honors in Chemistry. I went on to attend Rowan School of Osteopathic Medicine and graduated in 2014 with a certificate of honor for outstanding achievement in the specialty of pediatrics. I completed a 3-year Internship and Residency in Pediatrics at Children’s Regional Hospital at Cooper University in Camden, NJ and graduated in 2017 with an award for her outstanding contribution to teaching. Following graduation, I accepted a Pediatric Hospitalist position at Peyton Manning Children’s Hospital (PMCH). I have since become a board certified Pediatric Hospitalist. I have been fortunate to wear many different educational leadership hats at the UME and GME levels including Pediatric Medical Student Inpatient Preceptor and Pediatric Medical Student Clerkship Co-Director at PMCH as well as spending a portion of my time as an Assistant/Associate Professor of Primary Care and Clinical Chair in Pediatrics for MUCOM. I have been active member of the Pediatric Residency Program where I serve as the Pediatric Resident Inpatient Preceptor, an advisor to multiple residents, and a voice on the CCC and PEC. Some of my educational interests include professional identity formation, remediation, teach the teacher curriculum, morning report, and board review. I am enthusiastic about adult learning and channeled that energy into being the Head of Faculty Development on ASV Indianapolis campus. My own commitment to lifelong learning and my passion for teaching all levels of learners have led me down the path to advance my leadership competencies through enrollment in the John Hopkins University Master of Education in the Health Professions (MEHP) program.I started my journey into leadership initially as the Associate Program Director and was fortunate to advance into the Program Director role during the 2023 academic year.  I am incredibly excited to bring my creative and innovative energy to the program and to continue to mentor the residents to meet their fullest potential as future Pediatricians.  I am a mom of three--my toddler, Isabella, and my two fur babies-Loca Twinklesberry and Hanky.  In my free time, I prioritize my wellness through Pilates classes and I enjoy walking the Monon trail in Carmel with my husband, Dan, and Isabella.

Kristin Hem, MD

Associate Program Director
Pediatrician, Pediatric Primary Care Clinic
She/Her/Hers

Dr. Hem became a Pediatrician at the Joshua Max Simon Primary Care Center in 2020 and joined us after working for 16 years at the Barrington Health Center in Indianapolis where she served as a Clinical Co-Leader.  Dr. Hem has over a decade of educational experience working with residents and was a continuity clinic preceptor for Indiana University (Riley) Pediatric Residency Program.  She currently serves as an Assistant Clinical Professor for Marian University College of Osteopathic Medicine.  Dr. Hem has previously traveled to Myanmar and provided health care to people in remote villages.  She is a member of the Exodus Refugee Immigration Women's Circle and has a strong interest in the health of refugee children and families.  She has done several presentations throughout Indiana on "Caring for Burmese Children and Families".

Sophia Smith

Program Coordinator
She/Her/Hers

I was born and raised in Indiana and have proudly identified as a Hoosier my entire life. I have worked for Ascension for over 18 years in various organizational roles. I hold a Master’s degree in Business Administration with a concentration in Project Management. I have a deep love for working at Ascension Healthcare, and I particularly enjoy being the program coordinator for the Pediatrics Residency Program. Working with residents, learning from them, and helping them throughout their residency journey is incredibly rewarding. In my free time, I love spending time with my husband, our two children Jordyn and Jason, and our fur baby Milo. 

Katherynne Greve, DO

PGY-4 Chief Resident

She/Her/Hers

I am originally from rural West Tennessee and attended college at The University of Tennessee at Chattanooga where I earned a chemistry degree. I spent a year working in the non-profit environment before entering medical school at Marian University College of Osteopathic Medicine here in Indianapolis, IN. I rotated with St. Vincent for multiple rotations in medical school and loved the environment that was fostered amongst residents. I was happy to match and complete my residency at Peyton Manning Children's Hospital in June 2023. I am currently working as a part-time hospitalist and 4th year chief resident while applying for pediatric endocrinology fellowships! I love teaching and working with the residents in our program. In my free time, I enjoy trying local restaurants and breweries, walking on the Monon trail, and spending time with my husband Hendrik and our two cats.