Colo. Rev. Stat. § 38-27-104
Upon receipt of a written request mailed by certified mail, return receipt requested, from any person notified of such lien in accordance with the provisions of section 38-27-102, such hospital shall, within ten days after receipt of such request, furnish such person with an itemized statement of all charges for which the lien is claimed. If such injured person has not been discharged from said hospital at the time such request is received, then the hospital shall recite that hospitalization or medical treatments are continuing and shall furnish the said itemized statement within ten days after such person has been discharged from said hospital. In addition to being furnished the said itemized statement, the person, private or corporate, against whom the lien is asserted shall also be permitted to examine the financial records of the said hospital in reference to the services furnished for which the hospital is asserting a lien.
C.R.S. § 38-27-104