How to build a medical chronology for a personal injury case

A medical chronology is a dated list of every encounter in a client's care, with what happened at each one and where in the records it says so. It is the document the demand, the mediation brief and the expert work all draw on. A good one lets anyone on the team answer "when did she first complain of neck pain, and who wrote it down?" in seconds.

This guide covers what to collect first, the columns that matter, how to build it, and what to look for while you do.

What a chronology is for

The chronology serves four readers:

• The attorney writing the demand. It supplies the injury list, the course of treatment and the citations the demand letter needs.
• The adjuster or defense counsel. A cited chronology in the demand package shows the carrier where each claim is supported.
• Experts. A treating physician or retained expert can review the chronology before the full records.
• The case team. It shows what's missing: providers mentioned but never requested, referrals never followed, imaging ordered but never read.

It is not a summary of the client's story. It records what the providers wrote, with the page it's on.

Collect the complete record first

A chronology built on half the records has to be rebuilt. Before you start, check that the file has, for every provider:

• Office or chart notes for every date of service.
• Imaging reports, and the images if a radiologist's read is disputed.
• Billing records: an itemized statement with CPT codes, and what was paid, adjusted and still owed.
• Referrals out and reports back.
• Pharmacy records, if medication history matters.
• Prior records for the same body parts, often five years back or more, if a pre-existing condition is likely to be raised.

The records request guide covers Evidence Code 1158 and Health and Safety Code 123110 requests, and the records request letter generator drafts the letter.

The columns that matter

The citation column is the one that makes a chronology usable. Without it, every fact has to be found again by the next person who relies on it.

Building it, step by step

1. Sort the records by provider, then by date. Remove duplicates; the same visit often arrives from the clinic and again from the hospital system.
2. Start with the first encounter after the incident. The ER or urgent care note sets the baseline: mechanism of injury, first complaints, first findings.
3. Enter one row per encounter. Quote complaints and findings briefly rather than paraphrasing them into something the record doesn't say.
4. Cite every row to a file and page.
5. Add the billing from each provider's itemized statement, matched to the date of service.
6. Mark referrals and recommendations, then check that each was followed. An MRI ordered in March with no report in the file is a missing record or a gap in care.
7. Add pre-incident records in their own section, so prior complaints to the same body part are visible next to post-incident ones.
8. Have a second person check a sample of rows against the pages cited.
9. Update it as new records arrive. A chronology is a working document until the demand goes out, and again in discovery when the defense produces records the firm didn't have.

Keep the format plain: a table in Word or a spreadsheet that can be filtered by provider and date, exported to PDF for the demand package. A narrative summary of the injuries and treatment can sit on top of it for the letter, but the table is what the attorney and the experts check facts against.

Gaps, prior injuries and what the defense will find

The defense will read the same records, looking for:

• Treatment gaps. Weeks or months with no care. Find out why: insurance trouble, childcare, a provider closing. A reason documented in the file is better than one offered at mediation.
• Delayed first treatment. A first visit days after the crash invites a causation argument. Look for a phone call, a pharmacy record or a note explaining the delay.
• Prior injuries and conditions. Earlier complaints to the same body part. The chronology should show what changed after the incident.
• Inconsistent histories. Different accounts of the mechanism, or of prior pain, across providers.
• Other incidents. A later fall or second accident mentioned in a note.

Flag each in the chronology so the attorney decides how to address it, instead of learning about it from the adjuster.

Tying the chronology to specials

The charges column becomes the specials figure. Under Howell v. Hamilton Meats & Provisions, Inc. (2011) 52 Cal.4th 541, past medical damages for insured care are limited to amounts paid or still owed, not billed amounts a provider agreed to write down. Keep billed, paid and balance in separate columns so the demand can show both, and note which providers treated on a lien or a letter of protection. The totals should reconcile with each provider's statement and with the lien amounts asserted. See specials and Howell damages.

A quality checklist

• Every provider in the records has records in the file, or an open request.
• Every row has a date, a provider and a citation.
• Every referral and recommendation has a follow-up row or a note explaining why not.
• Gaps of more than a few weeks are flagged with a reason or a question.
• Billing totals match the providers' statements.
• Pre-incident records sit in their own section.
• A second person has spot-checked citations.

Building the chronology in PlaintiffStack

PlaintiffStack's treatment chronology tool builds a dated chronology of care from the documents on the case, and every entry cites the page it came from. The missing records report lists records, bills and referrals that are mentioned but not in the file. A morning check flags gaps forming in treatment while the client is still treating, which is when they can still be explained or closed. Each tool shows an estimated cost before it runs; AI usage is billed separately from the per-case price.

One limit to know: agents read searchable PDFs, Word and text files. Scanned and faxed records aren't read yet, because there is no OCR, and a file with no readable text is flagged in the document list. See the personal injury page, Documents and the medical chronology software guide.