Workers’ compensation claimants have the burden of showing that the workplace accident is the major contributing cause of an injury. Section 440.09(1), Florida Statutes (2017). Major contributing cause, or MCC, means the cause which is more than 50 percent responsible for the injury as compared to all other causes combined for which treatment or benefits are sought. Sec. 440.09(1).
This is not an issue in every case. Many injuries are accepted by the Employer/Carrier (E/C) without dispute. Doing so prevents the E/C from later denying compensability of the accepted injuries. However, if the E/C is uncertain of its obligation to provide benefits, it may choose to provide benefits under a reservation of rights pursuant to section 440.20(4), Florida Statutes (2017).
Unlike the unconditional acceptance, this section affords E/C the option of denying compensability within 120 days after the initial provision of compensation or benefits. If, however, the E/C fails to deny compensability of an injury within 120 days after the initial provision of benefits for an injury, it waives the right to deny compensability of this injury “unless the carrier can establish material facts relevant to the issue of compensability that it could not have discovered through reasonable investigation within the 120-day period.” § 440.20(4), Fla. Stat. (2017). See, e.g., McIntosh v. CVS Pharmacy, 135 So. 3d 1157, 1159 (Fla. 1st DCA 2014); Bynum Transp., Inc. v. Snyder, 765 So. 2d 752, 754 (Fla. 1st DCA 2000); see also § 440.192(8), Fla. Stat. (2017) (“A carrier that does not deny compensability in accordance with s. 440.20(4) is deemed to have accepted the employee’s injuries as compensable, unless it can establish material facts relevant to the issue of compensability that could not have been discovered . . .”)