Hello Jaki and Karen,
Thank you for reaching out. We apologize for the delay in our response.
The only way to get access to a beneficiaries Medicare Data, via the Blue Button API, is to have them approve access via their Medicare.gov account. There currently is no other method to do so.
Please let us know if you have any other questions.
Thank you,
Brady Fausett
BB2.0 FHIR Developer Evangelist