What is the ruling on a man going to a female neurologist and psychiatrist who is with him in the treatment room, and is this considered unlawful seclusion (khalwah shar'iyyah), given that there is another clinic with a male doctor, and does the doctor's proficiency in her work change the ruling?

It is not permissible for a female doctor to treat a man, except out of necessity, if the illness could lead to his demise, or the loss of one of his senses, or cause him severe pain, and there is no male doctor available to treat him, and the treatment cannot be delayed. Similarly, it is not permissible for a female doctor to be alone with a man in a room, unless the other doctor is not proficient in the treatment or the cost of his treatment is high.