Designated Service Provider, chosen by the Scheme. You have to use this provider for treatment of specific out-of-hospital conditions, or to get coverage for PMBs. Sometimes the DSP is a state hospital. Find out from the Scheme which DSP applies for your region.
Medical Aid 101
PMBs are 270 conditions that schemes have to cover without requiring co-payments or savings from you, even if the treatment is provided out-of-hospital. This applies to every plan.