Go back to school to further your education and get an Associate's degree of Applied Science in Medical Assisting this will help you go further up the ladder.

My job has a tiering process where you can do things and take tests to go from a tier one to tier two and then tier two to three and with each comes a raise. Then medical assistants can become clinical coordinators and then eventually like an office manager. My current office manager started out as a medical assistant.

Most jobs in the medical field require certifications and qualifications. Preferably experience, some employers are willing to train. I would brush on learning the different color code tubes for phlebotomy, get familiar with medical records electronically, medical terminology, injections, each doctor office will have a certain profession for example an eye doctor, a psychologist they would have you performing certain task so become well rounded so you can perform in any environment.