Provider wants to check the testosterone levels in a FTM transgender pt. He is using the dx of male hypogonadism.

The coders in our office are wondering if this is an appropriate dx?

Our thinking is that since he is taking testosterone externally, the issue is not about testosterone production or, if it is about testosterone production, it is not produced in the testes. We don’t have enough of his medical history, so we are unsure if ovaries are intact, but are assuming they are not.

We’ve been researching this and have found lots of information about the importance of checking his testosterone levels, but nothing about what dx to use for the testing.

Does anyone have any information about this?
Thanks in advance,
Lisa