To create a greater sense of authority, and that you are somebody important, list the name of a person and company who you've worked with before, especially if that person and company is a direct competitor of the person you are calling. Nothing grabs the interest of the person you are calling faster than hearing the name of their main competitor.
For a medical office, call types may include billing, emergencies, appointments, cancellations, etc. 2. Determine How To Best Route Calls The best method of routing your medical office calls will depend on your office size and budget. If you have a small staff, setting up a standard voicemail greeting system may be a more practical approach. For a larger health organization with multiple departments, it makes more sense to route calls to their intended destinations by using an auto attendant. For example, “If you have a question about billing, press 1. If you’d like to schedule an appointment, press 2. If this is a medical emergency, press 0 for an operator.” If you want every caller or patient to experience a professional and compassionate call, you may consider working with a medical office answering service. You can forward calls to an answering service after business hours, on holidays, during overflow, or any other time you may need help answering calls. 3. Draft A Script

Here are some helpful links to help you record voicemail greeting that is clear and professional. Record your phrases for recording a great voicemail greeting here. Record yourself and compare it with a native speaker. Hear Georgie giving helpful feedback to other students on their voicemail greetings.
4. Limit background noise. You want your voice to come through crisp and clear, so make sure that there’s no noise in the background like a radio, tv, or people talking. The best place to record your voicemail is in a quiet room that’s away from excessive noise. Smaller rooms will also work better as there won’t be as much ambient sound as in a large, open space.