Are there any legal restrictions to offering patients an incentive to refer their friends?

This depends on state laws. While offering incentives (such as a gift card, entry in a drawing, etc.) for patients to refer friends can be a great way to get new patients, offering such incentives may be illegal in your state or in a particular circumstance. Always check your federal and state laws and confer with your legal advisor before using an incentive in this way. 

If referral incentives are allowed in your state, RevenueWell has several custom campaign templates available to help you. In the Campaigns tab, click "Create Campaign" to see the list of available templates.