About Us


  • Mark Diel
    Mark Diel

    Executive Director and CEO

    Mark comes to CCHI after 9 years as Executive Director and CEO of Children’s Health Initiative Napa County, where he developed the first nonprofit insurance brokerage firm in California serving individuals and families. He built a county-wide collaborative of 42 agencies and guided Napa County into a leadership role at the state level, working to provide affordable health insurance to everyone in California, regardless of race, ethnicity, or family income.

    Prior to his work in Napa County, he managed public health programs in Yolo County, including the Women Infants and Children Program, he developed mobile medical, dental, and optometric clinics based in schools and community centers, and a Health Promatora program in Los Angeles. Mark holds a Master of Public Health degree.

  • Katie Heidorn
    Katie Heidorn

    Director of Development and Policy

    Katie joined CCHI in 2017. As CCHI’s Development Director, Katie leads CCHI’s future development strategy and creates new and innovative opportunities for CCHI members. Katie previously served the Brown Administration as Deputy Secretary, Special Programs, and as Assistant Secretary, Program and Fiscal Affairs, at the California Health and Human Services Agency (CHHS) from 2012 – 2016. Prior to her time at CHHS, Katie was Principal and Associate Consultant to the Senate Appropriations Committee from 2008 to 2011, was an Associate at the Dewey Square Group from 2007 to 2008, and served as a California Senate Fellow in then-Senator Tom Torlakson’s office from 2006 to 2007. Katie holds a bachelor’s of arts and sciences in Biochemistry and Molecular Biology and Comparative Literature from the University of California, Davis, and a master’s in public administration from the University of Southern California.

  • Heather Bates
    Heather Bates


    Heather is new to the team, but you may recognize her from the national nonprofit, Families USA. She comes to NAHAA to help further develop membership programming and services, as well as lift up and share best practices and lessons learned from across the country. Heather has over 20 years of experience managing health policy related programming, staff and volunteers in order to meet the needs of consumers enrolling in Medicaid, Medicare, and most recently the Affordable Care Act (ACA). While at Families USA she led efforts to grow an enrollment network across the country and most recently, led successful state-based ACA defense campaigns in Alaska, Arizona and Maine. Prior to working for Families USA she worked for Enroll America/Get Covered America to launch state-based awareness and enrollment campaigns in several states across the country in order to establish outreach and enrollment best practices under the ACA. Prior to the implementation of the ACA, Heather worked for the national nonprofit, the Medicare Rights Center where she served as Vice President of Client Services. In this role Heather helped to restructure the organization, develop new programming, and expand their national training and technical assistance programing to nonprofits enrolling Medicare beneficiaries into public benefits and Medicare Part D prescription drug plans. She has a Master’s degree in Social Work from the City University of New York’s Hunter College and her undergraduate degree from the Ohio University in Athens, Ohio. Heather grew up in the performing arts and was raised in community theater studying acting from a young age at the School for Creative and Performing Arts in Cincinnati, Ohio. She loves to talk about the arts, the Midwest, the beauty of the coasts and learn about all of the people and places in-between.

  • Elizabeth Hagan
    Elizabeth Hagan

    Director of Programs

    Elizabeth Hagan is Associate Director of Policy for California Coverage and Health Initiatives (CCHI) and the National Association of Health Access Assisters (NAHAA). In this position, she advocates for policies that help enrollment assisters and the consumers they serve. She also works with state and local partners to identify and elevate promising outreach and enrollment practices taking place across the country. Previously, Ms. Hagan was Associate Director of Coverage Initiatives at the nonprofit nonpartisan organization, Families USA, where she also focused on policies to foster successful enrollment. Prior to joining Families USA, Ms. Hagan was a Policy Analyst with Enroll America's Best Practices Institute. Ms. Hagan is based out of Washington DC and holds an MPA from George Washington University and a BA from Ohio State University.

  • Maria Romero-Mora
    Maria Romero-Mora

    Director of Programs

    Maria Romero-Mora joined CCHI as Project Coordinator of the Connecting Kids to Coverage Project, a national campaign through the Centers for Medicare & Medicaid Services, for which she manages the collaboration, program management, and evaluation of partner organizations based in 7 counties. Maria has ample experience in health insurance education and enrollment having started as a Certified Application Assistance (CAA) in Yolo County in 2007 with the local Community Health Initiative (CHI). Her work included direct engagement with migrant populations to identified safety net resources, health coverage enrollment, and the development of safety net programs. Maria is bilingual, bicultural and writes Spanish fluently. She received her B.A. in Community and Regional Development from the University of California, Davis. Maria is a certified enrollment counselor (CEC).

  • Natasha Phillips
    Natasha Phillips

    Program Assistant

    Natasha comes to CCHI with a background in nonprofit programs, communications, and development. A Sacramento transplant, she is originally from the East Coast, and received her BA in Government and Economics from Wesleyan University. After graduation she worked as the Program Coordinator at an Arabic Language Institute in Muscat, Oman. Returning to the US, she moved to Sacramento to work as the AmeriCorps VISTA Capacity Building Specialist at Opening Doors, a local refugee resettlement agency. She is passionate about working to improve living conditions for communities, regardless of immigration status, income, ethnicity, etc. She is thrilled to be supporting CCHI and its mission as a program assistant.

  • Aissa Perez
    Aissa Perez

    Program Coordinator

    Aissa Perez and is a new program assistant here at CCHI. She recently graduated from UC Davis with degrees in English and Sociology, with an emphasis in social services.Throughout her college career she interned with various social service and non-profit organizations, including the International Rescue Committee and PICO California. Originally from Southern CA, she loves Northern California and is excited to be a member of the CCHI team.

  • Careen Clare Marinas
    Careen Clare Marinas

    Office Manager

    Careen joined CCHI in 2017. As the Office Manager/Executive Assistant, Careen oversees human resources, finance, and administrative duties to ensure CCHI functions smoothly. Additionally, she serves as the liaison between the Board of Directors, member organizations and staff. She is passionate to work on issues related to access and quality health coverage and care for all Californians. Her past employment has given her the opportunity to work with a variety of groups including youth, students, educators, low-income families, migrant families, council members, and other government officials. Careen speaks English, Tagalog and Ilocano. Careen holds a B.A. in Business Administration.