GCOR: Supporting Providers, Strengthening Systems
At GCOR, we believe transformation happens when providers are empowered to focus fully on care.
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We support healthcare professionals who deliver comprehensive health services for adults—including outpatient counseling, psychiatric care, tele-health, and more—by managing the billing, compliance, and administrative infrastructure behind it all.
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Rooted in evidence-based practices and operational excellence, our mission is to ensure that every client’s journey to mental wellness and recovery is supported by accurate documentation, timely reimbursement, and seamless coordination.
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At GCOR, we empower providers—one person, one plan, one breakthrough at a time.
Tammy Fuller
Tammy Fuller serves as Vice President of GCOR, where she leads strategic operations with a mission to empower healthcare providers through high-quality, compliant, and efficient administrative support. With extensive experience in behavioral health operations and managed care systems, Tammy ensures that every aspect of GCOR’s infrastructure is designed to support the success of the providers we serve.
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Under her leadership, GCOR delivers dependable and streamlined services in billing, revenue cycle management, compliance oversight, and care coordination. Tammy is deeply committed to operational excellence, provider satisfaction, and building scalable systems that allow healthcare organizations to focus on delivering exceptional client care while we manage the complexities behind the scenes.
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Tamika Thornton-Hill
As President of GCOR, Tamika Thornton-Hill leads with a clear vision: to build lasting, trusted partnerships with healthcare providers who are committed to delivering high-quality behavioral health services. With a strong background in healthcare operations and business development, Tamika plays a key role in client acquisition, strategic outreach, and relationship management—ensuring providers have the support they need to operate efficiently and compliantly.
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Through proactive communication and a deep commitment to provider success, Tamika ensures every GCOR partner feels supported, valued, and empowered—so they can stay focused on what matters most: delivering impactful care to the clients and communities they serve.
Organization Overview
A Framework of Care and Accountability
GCOR is a state-licensed managed billing and administrative support organization based in Phoenix, Arizona. We partner with integrated healthcare facilities and well as providers across the state to streamline operations, ensure regulatory compliance, and support high-quality care delivery behind the scenes.
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Our services are designed to reduce administrative burden for healthcare professionals by managing key functions such as claims processing, utilization tracking, documentation oversight, and payer communications. Whether you’re delivering individual therapy, psychiatric services, crisis intervention, or rehabilitation programs, GCOR ensures your billing and compliance infrastructure is accurate, timely, and fully aligned with state and federal requirements.
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We are committed to helping providers stay focused on what matters most—the clients—while we handle the operational and financial systems that keep care accessible, accountable, and sustainable. With GCOR as your trusted partner, you gain the confidence of knowing your back-office operations are built for efficiency, audit readiness, and long-term success—so you can deliver care without compromise.