Nothing in this section shall preclude the development of alternative patient centered medical home models by an insurer for its group and/or individual policies, or by the secretary, the commissioner or other state agencies or preclude insurers, the secretary, the commissioner or other state agencies from establishing alternative models and payment mechanisms for persons who are enrolled in integrated Medicare and Medicaid programs, are enrolled in managed care long-term care programs, are dually eligible for Medicare and Medicaid, are in the waiting period for Medicare, or who have other primary coverage.