No, you do not need to provide ACH information or any additional documentation if you are not requesting wage or travel reimbursement. You are automatically enrolled in the other protections.
Liver FAQ: Donor Protections Available
Lost wage reimbursement is only available to donors with a valid Employer Identification Number (EIN) or Social Security Number (SSN). The other Donor Shield protections do not require an EIN or SSN.
All donors who donate through a National Kidney Registry exchange or participating Donor Shield Direct Center receive a comprehensive set of protections, including reimbursement for lost wages and travel, lodging and dependent-care costs. To read about these protections, see: Donor Protections.