A wrong date
The entry's date is not the date of service printed on its page.
Tested on synthetic records only. No real client record has been through this tool. Every patient, provider and page shown here is invented.
Medical chronology Synthetic records only
Scanned records in. Every entry checked against the page it cites.
Today the chronology is run as a reviewed service: a firm sends records, and a reviewer approves every entry beside its page. OCR runs on the machine that holds the records. To draft entries, the text of each visit's pages is sent to an outside model service; for client records that step stays off until a business associate agreement is signed. So far only synthetic records have been through it.
2025-07-22To decide
Cedar Hollow Medical Center Emergency Department
Findings, word for word from the pages
- Neck pain after a motor vehicle collision.
- Tenderness over the cervical paraspinal muscles.
- Cervical strain (S16.1XXA).
- Ibuprofen 600 mg, follow up with primary care.
MOCK000001MOCK000002
Proposed by the model. Every word found on the cited page.
The pipeline
Eight stages. A model has a hand in one of them.
Each stage is done by code, by a model or by the reviewer. The model's only job is to propose. It decides nothing.
-
Scan in
The firm's PDFs are received once an authorization is on file. Every page gets a Bates number and a row in the page list.
Code -
Read locally
OCR runs locally, on the machine that holds the records. Blurred, faint and handwritten pages are marked low.
Code -
Propose
A model drafts one entry per visit, quoting whole sentences from the pages. This is the one step where page text leaves that machine.
Model -
Check each word
Every proposed word is compared with the text of the page the entry cites.
Code -
Review beside the page
The reviewer approves, rejects or edits each entry with the page image next to it.
Reviewer -
Deliver
Only when every entry has a decision and every page is accounted for. Word, PDF and Excel.
Code -
Read back
Each file is opened again and compared with the entries the reviewer approved.
Code -
Purge
The records, the entries and the service's copy of the report are deleted, 30 days after delivery unless another time is set.
Code
Watch how it works
The whole tool in seventeen short scenes.
An animated walk from intake to purge, including four kinds of entry the checker refuses. Use the arrows to step through at your own pace. On a narrow screen the same steps are shown as a list.
Synthetic records only. The explainer follows a different invented case from the demo.Open the explainer on its own page
What the checker refuses
An entry must be made of the page's own words.
Findings are quoted, not paraphrased, so code can check them. An entry is refused if any of these is true. A refused entry goes to the reviewer's list with the reason. The reviewer fixes it against the page, and the fix is checked again.
Another provider's page
The entry mixes in a page from a different provider, even one seen the same day.
A cut finding
A quoted sentence stops short of what the page says.
An added word
A No
in front of a finding, or any word the page does not have.
Another visit's page
The entry cites a page that belongs to a visit on a different date.
A page from another matter
Citations stay inside the matter they came from.
A visit type the provider contradicts
An entry called an emergency visit on a page from a physical therapy clinic.
An invented cost, or a dropped diagnosis
A billed amount the pages do not show, or an entry that leaves out its page's assessment.
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Open full size
What it flags for the reviewer
Every page is accounted for before anything is delivered.
Visits the model missed
A page that reads as a visit, with no entry citing it, is listed as a possible missed visit. The reviewer writes the entry or says why none is needed.
Another patient's page
When most pages name one person and a page names someone else, it is flagged as possibly misfiled.
Duplicate pages
A second copy of a page is suggested as a duplicate. It keeps its Bates number and stays in the page list.
Pages OCR could not read well
No entry may cite a low page until a person has checked its text. For a handwritten page, the reviewer types what it says and the report marks the text as typed by the reviewer.
Bills and totals
Bill pages are matched to their visit. When the reviewer adds a bill, its amount reaches the report, and one bill cannot be counted twice.
An encrypted disk, or nothing opens
The review screen refuses to open records on a disk that is not encrypted.
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Open full size
Delivery and purge
Delivered files are read back. Then the records go.
Delivery waits until every entry is approved or rejected and every page has an entry or a reason. The chronology is written as a Word document, a PDF and an Excel sheet from approved entries only.
Each file is then opened again by code and compared with what the reviewer approved. If a file does not match, it is not offered.
After delivery, the records, the entries and the service's copy of the report are deleted on a set date, 30 days later by default. The page list and the reviewer's decisions about each page are kept as a record of what was done.
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Measured, in our own tests, on synthetic records
Results from 42 synthetic cases.
2,824 pages and 1,136 visits. On 10 Nov 2026 we re-ran the checks, delivery and purge on them (OCR text for 37 of the 42 cases was kept from the 7 Nov run). This run used no model: the entries tested were exact quotes from an answer key, plus errors planted on purpose. It measures the checker, not a model's drafting.
- True entries that passed the checker
- 1,128 of 1,136
- 8 true entries were refused. All trace to OCR reading a bracket as a letter. 10 Nov 2026. 3
Limits
What the chronology cannot do yet.
This is the least proven of the three tools. Read these before anything else on this page.
- Every record so far is synthetic. No real client record has been through the tool. The sorting rules fit our own synthetic layouts.
- The large test used no model. It tested the checker with perfect entries and planted errors. With a model, we have one small run: 28 synthetic pages gave 11 entries for 11 true visits on 10 Nov 2026.
- 8 true entries were refused. OCR read
]
asl
in a medication list, so a true quote no longer matched its page. Refusing is the safe outcome, and it leaves the entry for the reviewer to fix. - Real handwritten pages cannot be cited by the model. On 22 pages of real, public 1963 hospital records, all 10 handwritten pages were marked low and OCR could not read them. A person has to type the text.
- Real forms confuse the provider guess. On those same pages the suggested provider was wrong on 8 of the 13 pages that name one. It is a suggestion, and the reviewer corrects it.
- Dates and document breaks slip on real pages. On the 9 typed real pages that carry a date, the date was read right on 7. The 22 real pages were split into 20 documents where 13 was right.
- A slightly blurred page can still be misread. Heavier blur is marked low. Light blur may not be. The reviewer with the page beside the entry is the last check.
- A matter cannot be started from a screen. Creating the matter and reading the files in is still done by script.
- A misfiled page has no label of its own. A page from another patient is flagged, but the choices for it are still
No clinical content
,Duplicate
orWrite an entry
.
See entries beside their pages.
The demo shows the invented plaintiff's 28 pages of records, with the checker's verdicts on true entries and on planted slips.