An audiologist is a healthcare professional who specializes in the assessment, diagnosis, and management of hearing and balance disorders. They have extensive training and expertise in evaluating hearing loss, fitting and programming hearing aids, providing rehabilitation services, and conducting various auditory tests. On the other hand, a hearing instrument specialist, also known as a hearing aid dispenser, is trained to assess hearing loss, fit, and dispense hearing aids. They primarily focus on the selection, fitting, and maintenance of hearing aids but may not have the same level of education and training as an audiologist. While both professionals play a crucial role in helping individuals with hearing loss, an audiologist generally has a broader scope of practice and can provide a more comprehensive approach to hearing healthcare.