Final answer:
A Nurse Practitioner is a medical provider who can independently write prescriptions for patients following evaluation and diagnosis.
Step-by-step explanation:
The medical provider who works under the direction of a physician but can independently write prescriptions for patients following evaluation and diagnosis is a Nurse Practitioner. Nurse Practitioners are advanced practice registered nurses who have completed advanced education and training, allowing them to take on more responsibilities and provide a wide range of healthcare services, including medication prescribing. They work collaboratively with physicians but have the autonomy to evaluate, diagnose, and prescribe medications for patients.