(a) A health maintenance organization authorized to provide basic health care services shall maintain a minimum net worth of $1.5 million.
(b) A health maintenance organization authorized to provide limited health care services shall maintain a minimum net worth of $1 million.
(c) A health maintenance organization authorized to offer only a single health care service plan shall maintain a minimum net worth of $500,000.
(d) The minimum net worth required by this section may consist only of:
(1) money of the United States;
(2) bonds of this state;
(3) bonds or other evidences of indebtedness of the United States that are guaranteed as to principal and interest by the United States; or
(4) bonds or other interest-bearing evidences of indebtedness of a county or municipality of this state.