Which of the following is NOT a component of an EHR?

The choice of paper record management systems as not being a component of an Electronic Health Record (EHR) is correct because EHRs are designed to be fully electronic systems that manage patients' health information digitally. The primary purpose of an EHR is to consolidate and streamline healthcare data in a digital format, facilitating access, sharing, and management of patient records across different healthcare settings.

In contrast, electronic prescribing, clinical decision support systems, and practice management systems are integral components of EHRs. Electronic prescribing allows healthcare providers to send prescriptions directly to pharmacies, enhancing accuracy and efficiency. Clinical decision support systems provide real-time, evidence-based insights to clinicians to aid in decision-making, leveraging the data housed within EHRs. Practice management systems help in administrative tasks such as scheduling, billing, and overall management of the practice, often working in conjunction with EHR functionalities.

Thus, while the other choices contribute to or are part of the digital health ecosystem, paper record management systems represent traditional methods of recording and managing patient information, which EHRs aim to replace.