How to prepare a medical chronology: a step-by-step guide
This guide walks through how to prepare a medical chronology that holds up: one where anyone on your team, or an expert, can verify any line without redoing the work. It assumes you have the records in PDF and a template to fill in; you can download our free medical chronology template in Word or Excel.
Step 1: Inventory the records before you read them
List every document you received: the provider, the date range it covers, the number of pages and the Bates range if the production is stamped. If it is not stamped, number the documents and pages yourself (for example “D3 p.14”) so every citation you write later is unambiguous.
The inventory also tells you what is missing. A hospital visit with no discharge summary, an imaging order with no report, or a referral to a specialist with no specialist records are all worth a follow-up records request before you finish.
Step 2: Set aside duplicates and administrative pages
Productions often repeat the same note several times: in the chart, in a referral packet, in a records request response. Note duplicates once and cite the clearest copy. Separate purely administrative pages (fax covers, authorizations, billing correspondence) from clinical documentation, but do not discard them: a billing record can be the only evidence of a visit whose notes were never produced.
Step 3: Identify each visit and its date of service
Work document by document and mark where each visit begins. For each one, find the date of service: the date the care happened. It usually appears near the top of the note, labeled as the date of service, visit date, admission date or exam date.
Be careful with dates that look right but are not: the date a note was signed (often days later), the date it was printed or faxed, the date of a prior study mentioned for comparison, or a follow-up date in the plan. If a record has no documented date of service, write “undated” and list it in a separate section rather than borrowing a nearby date.
For hospital stays, record the admission and discharge dates and treat the notes from that stay as one visit.
Step 4: Record the findings of each visit, in the record’s words
For each visit, capture:
- Reason for the visit: the chief complaint in the patient’s words.
- History: what the patient reported, including prior injuries and conditions.
- Examination: what the clinician observed.
- Imaging and tests: the results, and the date of the study if it differs from the visit.
- Assessment: the diagnoses or impressions the clinician recorded.
- Treatment: what was done or prescribed at the visit, with doses where stated.
- Plan: what was recommended, ordered or scheduled next.
Quote or closely follow the record’s wording. Paraphrasing drifts, and a chronology that reads “severe pain” where the record says “moderate pain” will be caught in deposition.
Step 5: Cite the page for every finding
Add the page or Bates number to each finding, not just to each visit. A visit can span several pages, and a reviewer should be able to go straight to the line that supports an entry.
Step 6: Keep planned care separate from performed care
“MRI of the lumbar spine ordered” and “MRI of the lumbar spine performed” are different facts, and so are “physical therapy recommended” and “twelve sessions attended.” Label planned care as recommended, ordered or scheduled, and only record a procedure as performed when a note documents it.
Step 7: Track medications, diagnoses and gaps in care
As you go, keep three running lists:
- Diagnoses, with the date each was first documented and its page.
- Medications, with the prescriber, dose and dates.
- Gaps in care: periods between visits longer than your threshold, commonly 30 days. Gaps are raised in almost every negotiation, so note any documented reason for them.
Also flag pre-existing conditions and prior injuries recorded in the history; the other side will look for them first.
Step 8: Write the summary
Above the chronology, add a short summary: the providers and the number of visits with each, the first and last dates of treatment, the key diagnoses with their first documented dates, and the gaps in care. Keep it factual; conclusions about causation belong to experts and counsel.
Step 9: Check every entry against its page
Before anyone relies on the chronology, have someone other than the author spot-check entries against the cited pages, starting with the most important ones: the first visit after the incident, imaging results, surgical records and any entry that supports a key damages argument. Confirm that every visit has a date of service or is listed as undated, and that no planned care reads as performed.
Step 10: Deliver it in the formats your team uses
Most teams want a Word document to read and share, an Excel version to sort and filter, and increasingly a linked PDF where each page reference opens the cited page. Keep the source records with the chronology so citations stay verifiable.
How long this takes
An experienced paralegal can prepare a chronology of a few hundred pages of legible electronic records in about a day. Scanned records, handwriting and multi-thousand-page hospital charts take considerably longer. See what a medical chronology costs for how outsourced and AI-assisted options compare.
The shortcut
Medcron follows the same method: it reads the uploaded records, builds a visit-by-visit chronology with every finding cited to its page, keeps planned care separate from performed care and undated records separate, and a person reviews the chronology against the source pages before it is delivered as a linked PDF, Word and Excel. See a sample chronology or read what a medical chronology is.