89 Ill. Adm. Code 140.30
Audits
Section 140
Section 140.30 Audits
a) Effective July 1, 2012, whether pre-payment or post-payment,
all services for which charges are made to the Department are subject to
audit. During a review audit, the provider shall furnish to the Department or
to its authorized representative, pertinent information regarding claims for
payment. If records are maintained by a designated alternate payee, it is the
provider's responsibility to obtain the records and furnish them to the
Department. Should an audit reveal that incorrect payments were made, or that
the provider's records do not support the payments that were made, or should
the provider or designated alternate payee fail to furnish records to support
payments that were made, the provider or designated alternate payee shall make
restitution.
b) The Department's procedure for auditing providers may involve
the use of sampling and extrapolation. Under such a procedure, the Department
selects a statistically valid sample of the cases for which the provider or
designated alternate payee received payment for the audit period in question
and audits the provider's records for those cases. All incorrect payments
determined by an audit of the cases in the sample are then totaled and
extrapolated to the entire universe of cases for which the provider or
designated alternate payee has been paid during the audit period. The provider
or designated alternate payee shall be required to pay the Department the
entire extrapolated amount of incorrect payments calculated under this
procedure after notice and opportunity for hearing pursuant to 89 Ill. Adm.
Code 104.210.