Welcome to the forum.
Yes, it looks like an RF inductor or choke. From the position, it appears to be for suppressing interference back onto the mains input. It shouldn't be playing a major role in the RF oscillator, the inductor for that is the large one, bottom right of the tube in your last photo. There appears to be an identical suppression inductor on the other side of the matrix board, so it ought to be possible to compare the two, firstly for DC resistance and secondly, with an LCR meter or bridge, to measure the required inductance value.
What makes you think that the inductor is faulty? Overheating or high DC resistance? If it is the latter, check the soldering at the ends of the winding.
In terms of a replacement. Looking at the end of the winding, it looks like a wave-wound winding, for lower parasitic capacitance. These are almost impossible to find these days, but substituting an RF interference suppressor of similar value should hopefully be sufficient.
EDIT: I should probably add that, if the unit is actually going to be used for medical purposes, you really shouldn't be messing with it, and referring the repair to the manufacturer or appropriately qualified maintenance company.