Which of the following is NOT a responsibility of a medical assistant?

Prescribing medications is a responsibility that falls outside the scope of a medical assistant's role. Medical assistants are trained to support healthcare providers by performing administrative and clinical tasks, but they do not have the authority to prescribe medications. This responsibility is typically reserved for licensed healthcare professionals such as physicians, nurse practitioners, or physician assistants who have the necessary education, training, and legal authority to make such decisions.

Performing lab tests, taking patient histories, and assisting with examinations are all duties that align with the training and responsibilities of medical assistants. These tasks contribute to patient care and the overall functioning of a medical office, allowing medical assistants to support the healthcare team effectively while ensuring that patient needs are met.