3. A physician who treats beneficiaries of the Medicare program established pursuant to section 1801 of the Social Security Act (42 U.S.C. s.1395 et seq.) shall post a sign in his office which sets forth the following:
a. The physician's policy regarding the imposition of any charge in excess of the limiting fee for a service as determined by the United States Secretary of Health and Human Services.
b. The address and telephone number of the State Board of Medical Examiners.