Here's a template of the letter that's gotten me out of jury duty twice before. Feel free to use it and edit it however you wish. If I get called up again I'm blocking my schedule and going though. It'll beat the hell out of taking care of injured pickle ballers.
Dear Jury Coordinator:
I [your name] Juror Number 746, am requesting excusal from jury duty summons for the following reasons:
I am a podiatric physician and surgeon at [your practice] and participation in the anticipated jury process would severely limit my ability to provide continued care to my patients. I have several patients scheduled during that time period who will be in various stages of treatment and I would be unable to attend to them appropriately.
I am the owner of my practice, which is a small business. As my physical presence at work is vital to generating income, participation in the jury process would be extremely detrimental to the financial health of my business.
I am very supportive of the jury system and hope that my request does not cause a hardship for the courts. Thank you very much.
Sincerely,