Received following email:  "June 10, 2020  Mahreen Rashid, PNP   Spectrum Neuro Behavioral Care   Dear Provider:   Welcome to Blue Cross Blue Shield of Massachusetts. We’re pleased to have you as a participating provider in the following products:     Product Effective date X PPO (preferred provider organization) 06/04/2020 X HMO Blue â (managed care) 06/04/2020 X Indemnity 06/04/2020 X Medicare HMO Blue â (Medicare Advantage health maintenance organization) 06/04/2020 X Medicare PPO BlueSM (Medicare Advantage preferred provider organization) 06/04/2020   Use your National Provider Identifier (NPI) on all correspondence To help ensure accurate and efficient service, please include your NPI on all correspondence with us.   Individual NPI: 1396393146   Organization NPI: 1356906572 " 