Yes, it is a possibility. When hormone levels are normal but a man has azoospermia, it is due to other causes that affect sperm production or the expulsion of sperm to the exterior.
In the latter case, this sperm disorder is called obstructive azoospermia. In some cases, sperm can be retrieved with a testicular biopsy.
However, one should keep in mind that finding the cause of infertility, whether in the man or the woman, is not possible in all cases.