chronic pain is on the list...push your muscle spasms too. most docs that will sign will quickly do it for muscle spasms associated with ortho-injuries. i'm in nevada and that's how i became legal...

contact "dr jay" at overgrow or the AAMC at www.letfreedomgrow.com
dr jay is a californian and is a major player in the med movement there. he can guide you thru the california process...but it sounds like you should have no problems getting licensed. especially if you are currently under a dr's care or have recent med records detailing your condition.

good luck