AI Medical Chronology in QME Practice: What Labor Code 4628 Lets a Physician Delegate
Short answer: an AI medical chronology can organize, index, and date-order a record production, and it can point you to the page where a finding lives. It cannot review the records for you. Labor Code section 4628 requires the physician who signs a medical-legal report to have personally taken the history, reviewed and summarized the prior records, and composed and drafted the conclusions. A report that violates 4628 is inadmissible and unpayable. The line between a tool that helps you read and a tool that reads for you is the whole question, and the statute draws it.
The Thursday morning session at the 2026 CSIMS MedLaw Conference, "The Future of QME Practice: Innovation with Integrity," put AI use in QME practice on the agenda alongside its legal and ethical limits (conference agenda). This post covers the part of that discussion an evaluator can act on tomorrow: what the rules require, what the research says about machine summaries, and how to use one defensibly.
What does Labor Code 4628 require the physician to do personally?
Section 4628 is the anti-delegation statute for medical-legal reports. The physician who signs the report must perform the evaluation and the nonclerical preparation, and the statute names three tasks specifically: taking a complete history, reviewing and summarizing prior medical records, and composing and drafting the conclusions. The only assistance it contemplates is a nurse performing functions a nurse routinely performs, such as taking blood pressure. Even where excerpts and outlines are prepared by someone else, the physician must review the excerpts and the entire outline and make additional inquiries as needed.
The report must also disclose the name and qualifications of each person who performed any services in connection with it, and it must carry the declaration: "I declare under penalty of perjury that the information contained in this report and its attachments, if any, is true and correct to the best of my knowledge."
The consequences are not soft. The Labor Code 4628 post covers the section in full; the short version is that a report prepared in violation of it is inadmissible as evidence and creates no liability for payment. A knowing violation carries a civil penalty of up to $1,000 per violation.
Read against software, the statute is clear about the direction of responsibility. Reviewing and summarizing the records is the physician's act. A system that produces the summary and the physician signs it has inverted that.
So can an AI summary be used in a QME report?
An AI summary can be used the way a paralegal's index or a nurse's intake form is used: as a preparation aid the physician then verifies against the source. It cannot be used as the review itself.
The practical test is whether the physician can answer, from the pages, why every statement in the summary is there. If the chronology says "MRI 03/12/2024, 5 mm protrusion L4-L5, page 6," the physician turns to page 6 and confirms it. That is review. If the chronology says the same thing and the physician has never seen page 6, the physician is relying on a summary of records rather than on records, and that is exactly what 4628 forbids.
Two features of a chronology decide whether it supports or undermines this.
| Feature | Supports 4628 review | Undermines it |
|---|---|---|
| Page citation on every entry | The physician can verify each entry against the production in seconds | Entries with no page reference cannot be verified without re-reading the whole production |
| Coverage of the full production | The physician can see what the summary did not mention and go looking | A summary of an excerpt hides what was left out |
| Verbatim or near-verbatim extraction | The physician reads the record's own words | A paraphrase can drift, and drift is where facts change |
| Flags stated as leads to check | The physician makes the call | Flags stated as conclusions invite the physician to adopt them |
A chronology built this way is a reading tool. A chronology without page citations is a substitute for reading, whatever it is called.
What does the research say about machine summaries of medical records?
The evidence is more encouraging than the skeptics expect and more limited than the vendors imply.
In a 2024 study in Nature Medicine, Van Veen and colleagues adapted large language models to four clinical summarization tasks and had ten physicians compare the machine summaries with summaries written by medical experts across completeness, correctness, and conciseness. The adapted models' summaries were rated equivalent or superior to the expert summaries in most comparisons (Van Veen D et al., Nat Med, 2024;30(4):1134-1142, PMID 38413730).
The pattern is holding up in narrower settings. Shroff and colleagues reported on a large language model assistant for summarizing hepatology referral documents in the American Journal of Gastroenterology in 2026 (PMID 41504326), and Chechik and colleagues described automated summarization of military medical records in Military Medicine the same year (PMID 42332876). Wrenn and colleagues used the same approach on physician-to-physician transfer calls for heart attack patients (J Med Internet Res, 2026;28:e88834, PMID 42348906).
What none of these studies claims is that a summary can replace the reader. The failure mode that matters for medical-legal work is omission: a summary that is correct in every sentence but silent about the one prior injury that changes apportionment. A model does not know which record the case turns on. The evaluator does, and only after reading, which is why the medical record review post treats coverage of the whole production as the first requirement.
What does the DWC ethics rule add?
8 CCR section 41 requires the evaluator to review all available relevant medical and non-medical records and facts necessary for an accurate and objective assessment of the contested medical issues before preparing a report. The phrase is "all available relevant records," and it puts the coverage question back on the physician. An AI chronology that covers the whole production helps meet the standard. One that summarizes a sample does not.
The same section requires the evaluator to render opinions only on issues within their qualifications, education, and training. Reading a chronology is within any physician's training. Assessing what a language model may have missed in a 3,000-page production is a different skill, and the honest answer is that nobody can assess it without the page citations that let them check.
How should an evaluator document AI use in the report?
Section 4628 requires disclosure of each person who performed any services. Software is not a person, and the statute does not, on its face, require disclosure of a tool. Nothing prohibits it either, and there are two reasons to consider a sentence in the records section.
The first is the section 10682 requirement to list all information received in preparation of the report or relied on for the opinion, an omission judges redline more often than any other element. If the chronology was consulted, it was information relied on, and a reader is entitled to know that the physician verified it against the production.
The second is cross-examination. A deposing attorney who learns of the tool from a colleague rather than from the report has a question to ask about candor. A physician who wrote "I reviewed the complete production of 2,140 pages, using an indexed chronology to locate entries, each of which I verified against the cited page" has already answered it.
Lexamed was built on the side of that sentence. It reads the full production and returns a dated chronology in which every entry carries the page it came from and is checked against that page, so the evaluator's review is faster and the review is still the evaluator's. The tool locates and organizes; the physician reads, judges, and signs.
Frequently asked questions
Can a QME use AI to write the medical-legal report? No. Labor Code 4628 requires the signing physician to compose and draft the conclusions personally. AI can help locate and organize the records the conclusions rest on; it cannot author the opinion.
Can a QME use an AI medical chronology to review records? Yes, as a preparation and locating aid. The physician still has to review the records, which in practice means verifying the chronology's entries against the cited pages and reading what the chronology did not surface.
What happens if a report violates Labor Code 4628? The report is inadmissible as evidence, no payment is owed for it, and a knowing violation carries a civil penalty of up to $1,000 per violation.
Does the QME have to disclose that AI was used? Section 4628 requires disclosure of each person who performed services. It does not name software. Disclosing the tool in the records-reviewed section is prudent under 8 CCR 10682 and removes a cross-examination question.
How accurate are AI medical summaries? In a 2024 Nature Medicine study, physicians rated adapted language-model summaries equivalent or superior to expert-written summaries in most comparisons. The recurring risk is omission rather than fabrication, which is why page citations and full-production coverage matter more than fluency.
What is the difference between a medical chronology and a medical summary? A chronology orders the record by date of service with the source page for each event. A summary condenses the record into prose. For medical-legal review, the chronology is more useful because each entry can be verified and nothing is silently compressed.
Does 8 CCR 41 say anything about AI? Not by name. It requires review of all available relevant records before the report is prepared, which sets a coverage standard any tool has to help the physician meet rather than replace.
Can the physician's staff prepare the chronology instead? Staff can prepare excerpts and outlines. Section 4628 then requires the physician to review the excerpts and the entire outline and make additional inquiries. The rule for staff and the rule for software are the same: the physician reviews.