The rapid growth in the field of digital healthcare systems has increased the risk of safeguarding the very important sensitive information including patient health records (PHRs) and scanned medical images. Although the use of conventional digital watermarking (DWM) techniques is very effective way of protecting the information, they also face various challenges that includes vulnerability to attacks, scalability issues, and authenticity problems against numerous image processing techniques. Additionally, the emergence of new technology “quantum computing” introduces a new threat to the security of existing “encryption” and “watermarking” techniques. The new approach “quantum watermarking” (QWM) presents a promising solution with its quantum mechanics principles (superposition, entanglement, and no-cloning theorem), which is the cause for improving security, robustness, and scalability of information. Techniques such as flexible representation of quantum images (FRQI) and novel enhanced quantum representation (NEQR) are used to encode medical information into quantum formats, which will facilitate secure integration of quantum watermarks (WMs). This technique also confirms the information compactness, security, and resistance to tampering, as any unauthorized changes disrupt quantum states, making breaches noticeable. Also, QWM is more beneficial over conventional methods, in terms of its improved security, resilience to image alterations, scalability for larger datasets, and resistance to quantum computing threats. However, issues like quantum hardware implementation limitations and challenges and high costs avoids widespread adoption of this technology. As quantum technology develops, QWM plays a critical role in protecting medical information; this enables secure information exchange over network, which ensures regulatory compliance and enhances healthcare security in the field of quantum era.