Minn. Stat. § 62J.25 – Mandatory Medicare assignment

(a) Effective January 1, 1993, a health care provider shall not charge to or collect from a Medicare beneficiary who is a Minnesota resident any amount in excess of 115 percent of the Medicare-approved amount for any Medicare-covered service provided.
(b) Effective January 1, 1994, a health care provider shall not charge to or collect from a Medicare beneficiary who is a Minnesota resident any amount in excess of 110 percent of the Medicare-approved amount for any Medicare-covered service provided.
(c) Effective January 1, 1995, a health care provider shall not charge to or collect from a Medicare beneficiary who is a Minnesota resident any amount in excess of 105 percent of the Medicare-approved amount for any Medicare-covered service provided.
(d) Effective January 1, 1996, a health care provider shall not charge to or collect from a Medicare beneficiary who is a Minnesota resident any amount in excess of the Medicare-approved amount for any Medicare-covered service provided.
(e) This section does not apply to ambulance services as defined in section 144E.001, subdivision 3, or medical supplies and equipment.