Supplementary reports: when the questions come back.

A medico-legal report is usually treated as finished once it is signed and sent, and most practice workflows are built around that moment. Files come back anyway. New imaging arrives, the insurer poses three further questions, a solicitor asks the examiner to comment on a surveillance report, or the doctor notices that a date in the history is wrong. The second round is predictable work, and a practice that plans for it as an interruption pays for it in re-reading.

How long that re-reading takes depends mostly on decisions made during the first report. When every fact an opinion rested on can be traced to a page, a supplementary request becomes a scoped task: find what the new material touches, answer what was asked, and state what changed. When it cannot, the doctor rebuilds the file from memory months later, under a deadline.

The second round arrives in four shapes

Supplementary work is easier to manage once it is sorted by what triggered it, because each trigger carries a different obligation and, in NSW workers compensation at least, a different answer to whether it can be billed at all.

The four overlap in practice. A request labelled as further questions is sometimes a clarification in disguise, and a review of new material sometimes ends in a changed opinion. Sorting each request honestly at intake is what keeps the response scoped, and it tells the practice before any writing starts whether the work will be paid.

Clarifying an unclear report is unpaid work by design

The NSW workers compensation fees order for medical examinations and reports defines a supplementary report as one where additional information is provided for review or requested, or where additional questions are posed. It then carves out the case where the referring party has to seek clarification because a previous report was ambiguous or did not answer the questions previously posed, and in that case the supplementary fee does not apply.¹ The regulator has put a price on vagueness, and the examiner is the one who pays it.

Consider a capacity question answered with "fit for light duties". The insurer cannot act on that without hours, lifting limits and a review date, so the request comes back, and the follow-up is not a billable supplementary report. The same applies when a letter of instruction asks seven questions and the report answers six, however thorough those six answers are.

So precision in the first report works as cost control for the second. A practice that checks each report against the instruction's questions before it leaves, and that writes capacity and restrictions in terms an insurer can act on, removes a predictable class of unpaid rework before it arrives.

A changed opinion has to be reported promptly, with its reasons

Where an expert has provided a report for use in court and later changes an opinion on a material matter, the harmonised expert witness code requires a supplementary report to be provided forthwith. That report must state the assumptions and material facts, the reasons, any qualifications, and the other items the code lists for a report's content.² The expert code in the NSW Uniform Civil Procedure Rules carries the same obligation.³

The Federal Court's practice note treats the willingness to move as part of the role, saying experts should be prepared to change their opinion or make concessions when appropriate, even where that contradicts a view they previously expressed.² An opinion revised openly shows independence at work. Holding quietly to a position the new material has undermined is what damages an expert under cross-examination.

The reasons carry the weight. The same practice note warns that opinion evidence may have little or no value unless the assumptions and reasoning are expressly stated.² A supplementary report that says only "I have reviewed the further material and my opinion is unchanged" gives the reader nothing to test, because it never says what was reviewed or why it made no difference.

Suppose surveillance shows the claimant carrying shopping bags across a car park. A useful answer names the footage and its date, identifies the restriction in the earlier report that it bears on, and explains whether the observed activity is consistent with that restriction and why. That answer can be checked, which is the property every supplementary report needs.

Re-reading the whole file is the expensive part

The real cost of a supplementary report sits in a step that rarely gets named. Before the doctor can say whether new material changes anything, they have to reconstruct what the original opinion rested on: which history, which imaging, which treating notes. The code already requires a report to state the assumptions and material facts behind each opinion,² yet in most reports those facts sit in narrative prose rather than in a form a reader can check against.

Months after the examination, the file is no longer in the doctor's head. Without a link from each fact to its page, the only reliable way to know whether a new MRI contradicts something the opinion relied on is to re-read the brief, which turns a scoped request into most of a new report.

The second round also carries a cognitive hazard. Dror's review of expert decision-making lists the belief that experts are impartial and immune to bias among six fallacies, and names reference materials and contextual information among the sources of bias.⁴ A supplementary request supplies both at once, because the doctor's own earlier conclusion becomes the reference point and the request often arrives framed around the answer the referrer hopes for.

The defences are procedural. Read the new material and note what it shows before re-reading the earlier opinion, then compare the two. When a request to "amend" a report would change its substance, it helps to recall that the Federal Court's practice note tells parties never to pressure an expert into conforming their views to the party's interests.²

Corrections go on the record, never over it

Errors surface in the second round as well: a transposed date of injury, a medication attributed to the wrong treating doctor, a quote lifted from the wrong clinic letter. The Medical Board's code expects a doctor to sign only documents they believe to be accurate, and to take reasonable steps to verify the content before signing.⁵ When a signed report turns out to contain an error, the remedy is a correction that every reader can see.

The harmonised code anticipates this shape, because a later report may refer to material in the earlier one without repeating it.² A correcting supplementary can therefore be short and precise. What it must never do is quietly replace the original, since the parties may already have relied on it, and a reissued document carrying the first one's date makes it impossible to tell which version anyone read.

Run the second round from a register

The fix uses records the practice already keeps, held in a form the second round can use. A practice that wants supplementary work to take hours rather than days needs a few things in place before the first report goes out:

• a version register recording each report and supplementary, its date, its recipient, and the questions it answered;
• a materials log listing every document received, the date it arrived, and the report version in which it was first considered, which is also the material the Federal Court expects an expert to attach;²
• page references behind each fact the opinions rest on, so new material is checked against named assumptions instead of the whole brief;
• an intake step that sorts each request as new material, new questions, clarification or correction before anyone starts writing;
• a turnaround target, since the Medical Board's code expects a report the doctor has agreed to prepare to be completed within a reasonable and justifiable timeframe.⁵

The materials log does more work than it appears to. When a solicitor asks whether the doctor saw the second radiology report, the answer should come from the log in seconds, together with the version of the report in which that document was first considered.

The supplementary report is priced into the first draft

Every practice will get files back, and at least one major scheme has already decided who pays when the first report was unclear. The second round is cheap when the first report states its assumptions as checkable facts, answers every question in terms the referrer can use, and keeps a record of what was read and when. It becomes expensive whenever any of those was left for later.

Planning for the second round therefore starts at the first draft. A report written so that its own author can audit it in six months is the same report a cross-examiner will find hardest to take apart.

Trenthos IME is designed around that requirement. Each chronology entry carries a page reference into the brief, so the doctor can see which pages a fact rests on. Supporting the second round directly, with new material entering the same chronology marked as new and set against the facts already relied on, is the direction we are building toward. The doctor forms, revises and signs every opinion.