What role do medical experts play in establishing the severity of an injury under Georgia law?
They translate the medical facts for the jury and supply opinions that a layperson can’t give. Georgia doesn’t have a legal severity test, so experts address the underlying facts: diagnosis, cause, prognosis, permanence, limits, and future care. Each opinion has to satisfy O.C.G.A. § 24-7-702(b), with the judge acting as a gatekeeper and the Daubert decisions as a guide under subsection (f).
Who addresses what
| Topic | Witness | Note |
|---|---|---|
| What's wrong | Treating doctor | Firsthand |
| Why | Treating doctor, specialist | Medical probability (Zwiren v. Thompson, 276 Ga. 498 (2003)) |
| Will it last? | Treating doctor, specialist | Timing of the exam matters |
| Limits on activity | Doctor, therapist, functional capacity evaluator | Tied to testing |
| Future care | Doctor; life care planner | "Reasonably certain to accrue" |
| Earning impact | Vocational expert, economist | Rests on medical limits |
| Brain injury effects | Neuropsychologist, neurologist | Testing methods |
Treating doctor versus retained expert
A treating doctor doesn’t have to be disclosed as a retained expert in the same way, but opinions beyond treatment may raise a question. A treating doctor may be busy, or may be unwilling to testify. Georgia permits a deposition for use at trial under § 9-11-32(a)(3), and that witness needn’t appear in person if out of the county.
Defense experts
An independent medical exam under § 9-11-35 can be ordered on good cause. The examiner may disagree on severity or cause. Conflict goes to the jury. O.C.G.A. § 24-14-4 lets it weigh “means and opportunity for knowing”, which can favor a doctor who saw the patient over time.
Limits on testimony
- Credibility. An expert can’t vouch for the plaintiff (§ 24-6-620).
- Legal conclusions. “Serious” isn’t a legal term here, so an expert’s use of it adds little.
- Dollar value of pain. That’s for the jury and for argument (§ 9-10-184).
- Speculation. “Might” and “could” aren’t enough by themselves.
Narrative option
A medical narrative under § 24-8-826 can bring in a treating provider’s signed report on notice, and it’s presented “as depositions are presented”. A party can object, and may want cross-examination. It can save the cost of a deposition on a straightforward point.
Timing
A permanence opinion given before maximum improvement may be open to attack. An expert who rests on older records can be exposed by what came later. An early, complete set of records helps.
Workers’ compensation
Georgia’s statute says § 24-7-702 “shall not be strictly applied” in compensation proceedings (§ 24-7-702(g)). That’s a different setting.
Cost
Experts’ costs can be large for a small claim, and a treating doctor’s narrative or deposition can be a cheaper route.
General information about Georgia law as of November 2026. It is not legal advice and does not create an attorney-client relationship.