To amend title XVIII of the Social Security Act to require each off-campus outpatient department of a provider to include a unique identifier on claims for items and services, and to require providers with a department of a provider to submit to the Centers for Medicare & Medicaid Services an attestation with respect to each such department.

HR 3237 requires healthcare providers with off-campus outpatient departments (like clinics not on a hospital's main campus) to assign each department a unique billing identifier separate from the main provider's ID. Providers must also submit a compliance statement to Medicare (CMS) confirming adherence to existing regulations for each such department. Payments for services from these departments will not be processed after January 1, 2026, without the unique ID and valid attestation. CMS will verify compliance through site visits or remote audits, as outlined in the bill.