Tell them that you are participating in the PHP.  The PHP will confirm your participation but will need your written permission to provide additional information.  The insurer will typically want to know about your treatment plan, dates and location of all treatment/evaluation as well as the name of your supervising and/or monitoring physician(s) and usually requests that they be kept up-to-date with your progress while participating with the PHP.

_{This FAQ is not legal advice and should not be construed as such. When in doubt, you should consult an attorney. Thanks to John Miller, principal and head of Medical Services Practice, Sterling Risk Advisors for this FAQ.}