Yes. The NDIS aims to give choice and control to participants to select the services they receive. You can also decide to change providers if needed.
If the NDIA is managing your funding, you will need to choose a registered NDIS provider, such as I Can Jump Puddles.
If you are self managing your plan or using a registered plan management provider, you can use any service provider. Note that if a provider is not registered, you may need to consider the quality, risks, safeguards and potential additional costs of that provider.