You may see this in a doctor's report, a workers' compensation letter, or a settlement discussion: an injury has left a "permanent impairment," often with a percentage attached. That means some lasting loss of bodily function remains even after treatment has ended or the condition has stabilized. It does not always mean total disability. A person may still work, drive, or handle daily life but have a permanent reduction in strength, motion, sensation, balance, or another physical or mental function.

In practical terms, permanent impairment often becomes an issue after a crash, fall, or other serious injury when healing has reached a plateau, sometimes called maximum medical improvement. A doctor may assign an impairment rating based on the lasting damage to a body part or the body as a whole. That rating can influence the value of a claim, especially when future care, pain, work limits, or long-term restrictions are involved.

In North Carolina, permanent impairment matters a lot in workers' compensation cases under the North Carolina Workers' Compensation Act. For scheduled body parts, compensation may be tied to a doctor's rating under N.C. Gen. Stat. § 97-31. In a personal injury claim, there is no fixed percentage-based payout rule, but proof of permanent impairment can support damages for ongoing loss of function, reduced earning ability, and future medical needs. That can be especially relevant after high-speed pileups on I-40 near Asheville or roadway crashes that leave lasting neck, back, or joint damage.