She is resigning from the agency beginning in June to take an unspecified position in Oregon.
“My decision to accept a position in Oregon was based on the needs of my family, but that did not make it an easy one,” said Preciado in a statement released by the agency.
Stem cell chairman Robert Klein said she has "been a passionate voice on the ICOC for patient advocacy and the people of California’s Central Valley."
"She was a faculty research fellow for UC San Francisco's Fresno Latino Center for Medical Education, but left the position (in January) and is pursuing other career opportunities."
The Fresno Bee also reported that she "designed, developed and started a community-based diabetes program at a Fresno clinic and produced a diabetes education video for Hispanic teenagers.
"She is the diabetes action plan co-chair for the California Medical Association Foundation Network of Ethnic Physicians Organization, and a member of the joint task force for the California Diabetes Prevention and Control Program-Diabetes Coalition of California."
Her position on the board is that of patient advocate for Type II diabetes. Lt. Gov. Cruz Bustamante will have 30 days to fill the position.