Brief Answer:
Yes,it is curable in most cases sir;treatment depends on cause; yes;depends

Detailed Answer:
Hello sir and welcome.

Thank you for writing to us.

I have gone through your query with diligence and would like you to know that I am here to help. I would like you to understand that the treatment of impotence depends on the cause, and there are many causes for impotence. Most of them have primarily to do with blood circulation, but there are other causes as well. I would like to start by listing all the possible causes for impotence, for your reference. They are:

+Diabetes
+Heart diseases
+High blood pressure
+High cholesterol
+Alcoholism
+Tobacco use (smoking included)
+Substance abuse (e.g. drugs, cocaine, marijuana, etc.)
+Blocked or obstructed blood vessels
+Side effect of certain medications
+Obesity
+Conditions like parkinson's disease, metabolic syndrome, multiple sclerosis
+Scar tissue inside the penis
+Injuries to the spinal cord
+Psychiatric conditions (e.g. Stress, depression, anxiety, etc.)

The first and most important approach to treating impotence or erectile dysfunction (ED) is finding the cause. Treating the cause will be the most accurate way to address impotence. If the cause is treatable, then the impotence will be treatable sir, I hope this is clear to you.

Yes, you will require a long list of tests to help rule out/diagnose the cause from the conditions I have listed above.

Not all insurance policies cover treatment for ED, so it all depends on your insurance provider sir, please contact your insurance provider and check with them sir. But many of them do cover treatment for ED.

I hope you find my response both helpful and informative. Please feel free to write back to me for any further clarifications, I would be more than happy to help.

Best wishes.

---