I think the reason for the visit rather than the type of doctor. My wife & I may not accompany each other to our PCP for routine stuff (colds, shots, check-ups) but we do quite often when it relates to a significant health issue. I don't usually accompany her to her gynecologist either, but when she had an abnormal test result, she definitely wanted me there for follow-up. Acting as each others' advocates, we can take notes, ask questions, etc. that are difficult to do alone and under stress/pressure.

It's a decision for each couple.

Doc