50 Ill. Adm. Code 2602.40
Standards
Section 2602
Section 2602.40 Standards
No company shall withhold any
portion of any benefit payable as the result of a claim on the basis that the
sum withheld is an adjustment or correction for an overpayment made on a prior
claim arising under the same policy unless:
a) The company has within its files clear, documented evidence of
overpayment and written authorization from the insured permitting such
withholding procedure, or
b) The company has within its files clear, documented evidence of
all of the following:
1) The amount of the claim payment was clearly erroneous under
the provisions of the policy. If the amount is the subject of a legitimate
dispute between the insured and the company as to coverage or other policy
provisions, this procedure may not be used.
2) The error which resulted in the payment is not a mistake of
law.
3) The company notifies the insured in writing within six (6)
months of the date of the error, or within twelve (12) months for errors
arising from billing errors made by providers of services or treatment on the
compensable claim. Such six (6) or twelve (12) months period shall be measured
from the date of the claim check or draft which contains the erroneous payment.
4) Such notice states clearly the nature of the error and the
states the amount of the overpayment.