Following the completion of an involuntary admission certificate for a patient meeting the criteria under N.H. Rev. Stat. § 135-C:27 and not rescinded under N.H. Rev. Stat. § 135-C:29-a, the insurer shall pay the acute care hospital a per diem day rate required to board and care for the patient, to be contracted between the insurer and acute care hospital, for each day the insured is waiting in an acute care medical hospital located in the state for admission for psychiatric treatment at New Hampshire Hospital, a community-based designated receiving facility, or a voluntary admission. The day rate required to board and care for the patient may be billed for up to 21 consecutive days or discharge, whichever is sooner, and shall be renewed as needed for patient protection. The rate is deemed to cover all costs incurred by a hospital for the boarding and non-medical care of the insured and shall not be billed to the insured. This does not preclude a hospital from billing for other medically necessary services. Any qualified mental health worker employed by or contracted with the hospital, community mental health care center, or affiliate providing mental health services and supports to an insured in an emergency department in the hospital service areas while they are waiting for an inpatient or other psychiatric admission shall be reimbursed for those mental health services including diagnostic services by the insurer at the negotiated rate. Mental health services provided in this setting under this section shall be deemed medically necessary and shall not require prior authorization by an insurer. This section shall apply to the Medicaid managed care organizations subject to contract and rate agreements between the state of New Hampshire and the managed care organizations. The reimbursement for emergency room board and care shall be incorporated into the capitated rate for managed care services.