Physician Assistants

Cassandra Williamson, PA-C

Cassandra is a certified Physician Assistant who graduated from Kettering College of Medical Arts. She has been practicing hepatology at Digestive Specialists since 2004.

Cassie sees patients at our Dayton, Huber Heights, Kettering, and Springboro offices.



Amanda Simpson, PA-C

Amanda has been a licensed Physician Assistant since 2004. She obtained her physician’s assistant certification at Kettering College Medical Arts before completing her MS at the University of Nebraska.

Amanda provides patient care at Miami Valley Hospital and Good Samaritan Hospital.




Emily Ankrom, PA-C

Emily has been a licensed Physician Assistant since 2014. She obtained her physician's assistant certification at Kettering College of Medical Arts.

Emily provides patient care at our Dayton, Kettering, and Springboro offices.


Holly Griffin, PA-C

Holly has been a licensed Physician Assistant since 2015. She obtained her physician's assistant certification at Ohio Dominican University.

Holly provides patient care at Kettering Hospital and Sycamore Hospital.