The applicable provisions of this chapter shall apply as to:
1. All insurers authorized to transact insurance in this State;
2. All insurers having policyholders resident in this State;
3. All insurers against whom a claim under an insurance contract may arise in this State;
4. All persons in process of organization, or holding themselves out as organizing, or proposing to organize in this State for the purpose of becoming an insurer;
5. All other persons as to whom such provisions are otherwise expressly made applicable by law; and
6. Health maintenance organizations, which are considered insurers for the purposes of this subchapter and subchapter II.