The Commission’s enabling statute defines collateral source as:

(13) COLLATERAL SOURCE. Source of income, financial or other benefits or advantages for economic loss other than the compensation paid by the compensation commission which the claimant has received or is entitled to receive or is readily available to the claimant, from any one or more of the following:

a. The offender.
b. The government of the United States or any agency thereof, in the form of benefits, such as Social Security, Medicare and Medicaid, a state or any of its political subdivisions or an instrumentality of two or more states, unless the law providing for the benefits or advantages makes them excessive or secondary to benefits under this article.
c. Any temporary nonoccupational disability insurance.
d. Workers' compensation.
e. Wage continuation programs of any employer.
f. Proceeds of a contract of insurance payable to the claimant for loss which the victim sustained because of the criminally injurious conduct.
g. A contract providing prepaid hospital and other health care services or benefits for disability.

Ala. Code §15-23-3(13)