I suppose if you have some sort of issue. I go once a year
Either that or doctors you were working for were padding their revenues with unnecessary office visits.
I did that for the only purpose of getting new filters (They'd only give me two at a time since that is what insurance covered).
I quickly discovered that I could buy years' worth of filters for less than one office visit, so I quit that.
Patients calling and having issues with the machine or mask were the most common. Also “I can’t afford it.” But they checked/rechecked a lot of patients to see if the CPAP had effected any change in oxygen saturation during the waking hours. I recall people having to fill out questionnaires several times a year. But they were also pulmonologists and saw people with severe lung and breathing problems who were also on CPAP.
But you can think whatever you want. Shall I give you their office number so you can contact them and accuse them of cheating their patients?