Requires all health carriers to allocate, initially, not less than 6% of the carrier's total medical expenditures to primary care providers, with the percentage increasingly incrementally to 12%. Requires health carriers to pay primary care providers directly, rather than through administrative mechanisms. Places restrictions on downcoding and claim modifications. Requires health carriers to ensure access to primary care in rural areas, including access to Primary Care Access Visits and Community Access Primary Care Sites. Requires Insurance Commissioner to administer requirements established in bill. Requires the Department of Human Services Med-QUEST Division to apply the Act, to the extent permitted by federal law and subject to any federal approvals, to Medicaid managed care organizations. Requires reports. Requires the Auditor to evaluate the impact of the Act on various metrics 3 years after the measure's effective date. Establishes the primary care stabilization special fund.