The raised FSH levels with azoospermia
and the normal physical examination findings suggest a diagnosis of Primary Testicular failure - could be partial or could be complete.
is advised to to differntiate this. There can be occasional areas of sperm production in both the testis.
If areas of sperm production are found, then these sperms can be retrieved and can be used for ICSI
Get the biopsy done. It will help in future plan of treatment.
Hope I have cleared your doubts.