Re: Fusion L4
You may want to check out the Back Pain board. The Back Pain board has discussions more about the lumbar spine while this board is more the cervical spine.
You'll want to get details on what the fusion will be. L4-L5? L4-S1? You can't just fuse a single vertebrae, it has to be fused to an adjacent level.
I personally prefer orthopedic spine surgeons (just a personal preference) so get another opinion (but first get clarification of exactly what the current physician is recommending so you can compare recommendations)
Rt thumb fusion '13. R&L thumb arthroplasty '12 ; RT TKR & Bilat CTS' 11. Fusions: L5-S1('87), L4-S1('93), C5-C7('06), L3-S1('10), C4-C5('13). C5-C7 foraminotomy '08