Received the following welcome letter from reply-fec811777167077c-92_HTML-223860174-515007887-147@provider.aetna.com:  Sub: Welcome to our network. Let’s get started.   "Hi Shybi Varghese,  Welcome to the provider network effective May 15 2021 12:00AM.  Your Provider Identification Number (PIN) is: 6151807.  Ready to get started? To help make your onboarding easy, just check out the attached welcome kit.    Register here to attend our new provider onboarding webinar - Doing business with Aetna® . Sessions are held on the second Tuesday and third Wednesday of each month from 1:00 p.m. – 2:15 p.m. ET. You'll discover additional online tools and resources to make your day-to-day Aetna tasks quick and simple."  Attached screenshot of the email as well for reference. 