Final answer:
Only Quentin has the automatic right to access his medical information when he signs up for his doctor's health portal, due to privacy laws like HIPAA.
Step-by-step explanation:
When Quentin signs up for his doctor's health portal, only Quentin himself automatically has the right to access his medical information. This is due to privacy laws such as the Health Insurance Portability and Accountability Act (HIPAA) which protect patient information. Neither his wife, his employer, nor the appointment scheduler have the automatic right to access his health records without Quentin's explicit consent.