Provider Verification Outside organizations may request verification of providers in good standing that are on staff at Baystate Medical Center, Baystate Franklin Medical Center and Baystate Mary Lane Outpatient Center. Included in the verification will be the ability to print a verification letter on Baystate Health letterhead, with your facility name, your address and our signature. To obtain this letter, click on the provider's name. Please contact the Medical Staff Office with any questions at 413-794-4281. Verify a provider