Who is considered a licensed practitioner?

A licensed practitioner is someone who has completed the necessary educational requirements and training in a specific healthcare field, and has obtained a valid medical license from the appropriate regulatory body or governmental authority. This ensures that they are qualified and authorized to provide medical care or services to patients.

In this context, the correct answer highlights that a professional with a medical license possesses the credentials necessary to be recognized as a licensed practitioner. This designation indicates that the individual has met standardized qualifications and adheres to the regulations governing healthcare practices, ensuring they can safely and effectively administer care and medications to patients.

The other options fall short as they either suggest individuals lacking the necessary training and credentials, such as an untrained volunteer or a person without a medical degree, or limit the definition to a single role, like a medical assistant only, which doesn't encompass the full scope of licensed practitioners that may include doctors, nurse practitioners, physician assistants, and others who hold valid licenses in their respective fields.