Sandra Mastellos

Sandra Mastellos Director Claims and CollectionsSandra Mastellos
Director of Claims and Collections

Sandra has her degree in Administrative Healthcare Management, and since has worked in the mental/behavioral healthcare industry. She is originally from the San Gabriel Valley, where she raised four children. Sandra has recently relocated to San Marcos to join the AToN Center team, as the Claims and Collections Specialist. In her free time she enjoys, gardening, cooking and maintaining a healthy style of living.