When you create a professional voicemail greeting, it can be a good idea to think about what your callers might want to know. After doing so, you can make a list of points to cover in your voice message; it might also be a good idea to write out the entire greeting on a piece of paper. The ideal message should be somewhere between 10 and 20 seconds, so you may want to time yourself repeating your message before you record it. After composing your telephone message, it can be a good idea to get a second opinion of this greeting so you can make sure it sounds professional. Writing down a voicemail greeting helps prevent mistakes when recording it.
Instead of leading with tired old lines like 'Your call is important to us', brush up on your telephone etiquette and start your voicemail with a thank you.

We are actively reaching out to all patients who were affected by cancellations or changes by phone and email.If this is an administrative matter related to billing or appointments, we ask that you call us during our normal business hours. If this is an urgent matter concerning patient health needs and you need to speak to a provider on call, please press 1 and our answering service can help you."
1.“Hi! Thanks for calling [company name/your name]. Please leave a brief message and we will get back to you as soon as possible. Have a great day!”