What does rgn srn smc hca mean after nurses and doctors name?

The abbreviations "RGN," "SRN," "SMC," and "HCA" refer to different nursing and healthcare qualifications. "RGN" stands for Registered General Nurse, while "SRN" denotes State Registered Nurse, both indicating registered nursing credentials. "SMC" typically refers to the Singapore Medical Council, suggesting a medical professional is registered in Singapore. "HCA" stands for Healthcare Assistant, indicating support staff in the healthcare setting.