To which department code should I send my TOEFL score?
I'm thinking about applying for some US physics graduate programs. In the graduate admission procedure about where to send the TOEFL scores, I've often read the sentence "use the institution code ****, department code is not needed." However, the ETS website forces me to choose a department code. Now there seem to be two possible choices: there's the department code 76(physics), and there's the code 99 for "other subjects not in the list". The latter might at first seem ridiculous, but I found some schools explicitly demand department code to be chosen as 99. So for the schools that do not make such explicit statement, which code should I choose? Does it matter at all?