Hi there. To the best of my knowledge, there isn't a Dr. Yen in Building 9. He is not an employee of Lutheran at any rate, so I don't know any more than that. Do you mean Dr. Justin Yan? He is an ENT and as far as I know he only has offices in Arvada. Your best bet is to call the office to confirm. Sorry not to be more help.
Ask someone that works there. They can probably help you out alot better then some one on the internet.
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