Model this what is wrong with physicians?

Compared to differences among their male patient counterparts, female patients randomly assigned a female doctor rather than a male doctor are 5.0% more likely to be evaluated as disabled and receive 8.5% more subsequent cash benefits on average. There is no analogous gender-match effect for male patients.

And is it the male or female physicians who are at fault here?  Or is this diagnostic differential somehow optimal?

Here is the full NBER paper by Marika Cabral and Marcus Dillender.