Columbia subject headings:
Health insurance--United States--States.
Health maintenance organizations--Law and legislation--United States--States.
Managed care plans (Medical care)--Law and legislation--United States--States.
Medical care--Contracting out--United States--States.
Harvard subject headings:
Health maintenance organizations--Law and legislation--United States--States.
Managed care plans (Medical care)--Law and legislation--United States--States.
Medical care--Contracting out--United States--States.
Princeton subject headings:
Health maintenance organizations--Law and legislation--United States--States.
Managed care plans (Medical care)--Law and legislation--United States--States.
Medical care--Contracting out--United States--States.