I send the e-mail to a staff member on this to have them call - you could have them hit reply and send to themself - type in that they attempted to call and got no answer, left message, etc. Do this again the 2nd time and on the 3rd time send it to you so you know. You could then either file it or generate a quick mail letter.
Just an option - then you save to chart and paper trail is intact. If I have a phone call I am returning I will just hit reply - type what I want for information after talking with pt and save to chart.