As FI has said, a PES status is probably the least of your
worries currently.
But if you really must know, if your diagnosis is still pending
by the time you go for your check-up at CMPB, then you should
submit a specialist's letter to the MO anyway.
Most likely you will get PES D (unfit pending further
evaluation). Then once your diagnosis is certain, you will
be asked to return to CMPB for a follow-up.
I'm already enlisted. I just OOC-ed BMT cause everyone thought
it was a stress fracture. But I recently consulted my old
specialist who told me that it might be cancer. I'm currently pes B
btw