Accident Care and Treatment Center v. Csaa General Insurance Co.

Summary

The Supreme Court of Oklahoma held that the insurance company lacked an implied assignment of the injured party's lien rights because the written release contained no such assignment and the parol‑evidence rule bars extrinsic evidence to vary its terms. Accordingly, the trial court’s summary‑judgment ruling in favor of the medical providers was affirmed and the case remanded for further proceedings consistent with this opinion.