How to Find Your Primary Care Providers ID Number Instructions for Using Our Find a Doctor & Estimate Costs Tool Blue Cross Blue Shield of Massachusetts is an Independent Licensee of the Blue Cross and Blue Shield Association. Call Member Service at 1-888-456-1351 . You can also find this number on the front of your ID card and in your Summary of Benefits. Questions? 1 Go to MyBlue at myblue.bluecrossma.com . You can create a new account, sign in to your personalized MyBlue account, or continue without signing in. 2 Click Find a Doctor & Estimate Costs . If your plan requires you to choose a primary care provider (PCP), youll need to enter your PCPs ID number on your enrollment form. You can find this number in your plans provider directory, or by following these steps: