C.R.S. § 10-4-638

(1) Twelve months or more after the date a claim is paid for health-care services performed pursuant to this part 6, an insurer may not retroactively adjust the payment of the claim. (2) Adjustments to claims made pursuant to a policy providing for medical payments coverage in cases where a carrier has reported fraud or abuse, pursuant to section 10-1-128 (5)(a)(IV), committed by the provider shall not be subject to the requirements of subsection (1) of this section.