Will insurance cover ptosis revision surgery?

I would discuss this with your surgeon. Often is results are not as expected, a surgeon will do a revision at no cost. But this is usually discussed before the initial surgery.

The Mullerectomy is very popular with eyelid surgeons.  They like it because the anatomy is simple and the surgery can be done very quickly. That means that now, 80% of the time, patients get a Mullerectomy.  In my opinion, your type of result is very common with this surgery.  In many cases, a careful pre-operative eyelid assessment will predict that the Mullerectomy will fail.  You also have upper eyelid lash ptosis.  This needs to be corrected with a very fussy anterior levator resection ptosis surgery and an anchor blepharoplasty with a hard upper eyelid crease. Your current eyelid surgeon does not do this type of aesthetic reconstructive surgery.  The work is also not covered by health insurance.  I would be very cautious about letting this surgeon revise your eyelids.  There is a profound risk that you will be make worse.