Larger workload hurts my patients

My boss is forcing me to increase my patient load by 30%. For this and so many additional reasons, I am ready to quit. For reference, I am a urologist with 13 years’ experience, working 45 hours a week in an outpatient clinic. I pride myself on my high standard of care and if I see more patients, it will obviously lower it. What should I do? I don't want the patients to suffer