Medical Chronology for Personal Injury Cases: Example, Template and How to Build One

A personal injury case can come with hundreds or thousands of pages of medical records. ER notes, imaging reports, physical therapy logs, specialist consults and bills from a dozen providers, all in different formats and rarely in order. Before anyone can write a demand or prepare for a deposition, someone has to turn that pile into a clear account of what happened.

That's the job of a medical chronology. This guide explains what a medical chronology is, what goes in one, and how to build one step by step. It includes a template you can copy and a filled-in example for a sample personal injury case.

What Is a Medical Chronology?

A medical chronology is a date-ordered summary of a client's medical treatment, with each entry tied to the page in the records it came from. It shows what treatment the client received, when, from whom, what the providers found, and where the record has gaps.

In a personal injury case, the chronology is the working document the legal team relies on. Attorneys use it to evaluate the case, paralegals use it to draft the demand, and everyone uses it to find the source page quickly when a question comes up.

Medical Chronology vs. Medical Summary

The two are related but different.

• Medical chronology: organized by date. It answers "what happened, and when?" Each entry is a single visit or event.
• Medical summary: organized by topic, such as injury, body part or provider. It answers "what does it all mean?" and is often written as a narrative.

Most firms build the chronology first, then write the summary from it. The summary often becomes the medical section of the demand letter.

Why a Medical Chronology Matters in a Personal Injury Case

A good medical chronology helps your team:

• Show causation: connect the accident to the first complaint, the diagnosis and the treatment that followed
• Prove damages: list every visit, procedure and charge so the medical specials are complete
• Spot weak points early: find gaps in treatment, missed appointments and prior injuries before the defense does
• Draft faster: pull facts and page cites straight into the demand letter, discovery responses and deposition outlines
• Answer questions quickly: when an adjuster or opposing counsel asks about a visit, the source page is one lookup away

Who Prepares a Medical Chronology?

In most personal injury firms, a paralegal or case manager prepares the medical chronology and an attorney reviews it. Firms with complex medical cases sometimes use a legal nurse consultant, who can read clinical notes more quickly and catch medical issues a non-clinician might miss. High-volume firms sometimes outsource chronologies to a record review service.

Whoever builds it, the attorney should review it before it's used in a demand or shared outside the firm.

What to Include in a Medical Chronology

Every medical chronology has two parts: a header with case details, and a table of entries.

Header:

• Client name and date of birth
• Date of incident and how it happened
• Claimed injuries
• Providers whose records are included
• Records received through (date)
• Prepared by, reviewed by and version number

Each entry:

• Date of service
• Provider and facility
• Visit type (ER, PCP, PT, imaging, specialist, surgery)
• Complaints and findings, including pain scores
• Diagnosis
• Treatment and plan, including referrals and restrictions
• Charges
• Source page or Bates number
• Flag for anything the attorney should notice (gap, prior injury, inconsistency, future care)

How to Prepare a Medical Chronology: Step by Step

Step 1: Request All Medical Records and Bills

Start with the client interview. List every provider the client saw after the accident, plus any provider who treated the same body parts in the years before. Then request both records and itemized bills from each one.

Records requests are often the slowest part of the process. Under HIPAA, when a patient requests their own records, a provider generally has 30 days to respond and can take one 30-day extension, according to the HHS guidance on individuals' right to access their health information. Track each request with a date and follow up before the deadline passes.

Step 2: Index, Bates-Number and Remove Duplicates

Before you write a single entry, organize the records. Combine them into one set, run OCR so scanned pages are searchable, add Bates numbers, and remove duplicate pages. Many providers send the same notes more than once. Bates numbers give every page a permanent cite, so anyone can find the source later.

Step 3: Sort Records by Date of Service

Put every record in order by the date the care happened, not the date you received it. When one document covers several dates, such as a PT log, either break it into separate entries or use a date range.

Step 4: Pull the Key Facts From Each Visit

For each visit, record the complaints, exam findings, diagnoses, tests and treatment plan. Keep each entry short, usually two to four sentences. Use the provider's own words for important findings, especially anything about causation, such as "consistent with the reported motor vehicle collision." Write neutrally. The chronology records what the records say. Arguments belong in the demand.

Step 5: Document Gaps and Missing Records

Look for two kinds of gaps:

• Gaps in treatment: stretches of time when the client didn't see any provider
• Gaps in the records: visits you know happened but don't have notes for

Log both. For treatment gaps, note the length and any reason the client gave. For missing records, note what's missing and when you re-requested it.

Step 6: Flag Pre-Existing Conditions and Prior Injuries

If the client had prior complaints involving the same body part, include them in a separate prior history section. Note whether the earlier problem had resolved before the accident. Hiding prior injuries doesn't work, because the defense will find them. Documenting them lets your attorney address them directly.

Step 7: Add Charges to Each Entry

Pull the billed amount for each visit from the itemized bills and add a total at the bottom. This makes the chronology double as a medical specials summary for the demand. Note any balance that a lien or health insurer paid, since that affects settlement distribution later.

Step 8: Review, Then Update as New Records Come In

Have a second person check each entry against the source page. Then treat the chronology as a living document. Add new records as they arrive, update the "records received through" date, and change the version number so everyone knows which copy is current.

Medical Chronology Template

Copy this template into a spreadsheet or document and fill in one row per visit.

Header

• Client:
• Date of birth:
• Date of incident:
• Incident description:
• Claimed injuries:
• Records received through:
• Prepared by / Reviewed by:
• Version:

Treatment chronology

Gaps and missing records log

Prior medical history

Medical Chronology Example: Rear-End Collision Case

Here's the template filled in for a sample case. All names, providers and amounts are fictional.

Header

• Client: Jane Doe (sample)
• Date of birth: 04/12/1984
• Date of incident: 01/15/2025
• Incident description: Rear-ended while stopped at a red light
• Claimed injuries: cervical strain, L4-L5 disc herniation with left leg radiculopathy, right shoulder sprain
• Records received through: 06/30/2025
• Prepared by: Paralegal / Reviewed by: Attorney
• Version: 1.2

Treatment chronology

Gaps and missing records log

Prior medical history

This example shows what makes a chronology useful: every entry has a page cite, the causation statement is quoted, the treatment gap has an explanation and a next step, and the prior back strain is documented instead of ignored.

How to Handle Gaps in Treatment and Pre-Existing Conditions

These are the two issues insurance adjusters and defense attorneys look for first.

Gaps in treatment. A long stretch without care can be used to argue the client recovered, or that a later injury caused the ongoing pain. Record every gap, note its length, and find out why it happened. Common reasons include insurance approval delays, transportation problems, work schedules or waiting for a specialist appointment. Then back up the reason with documents, such as referral or authorization records.

Pre-existing conditions. A prior injury doesn't sink a case. What matters is whether the condition had resolved and whether the accident made it worse. Document the prior complaint, the date it was last treated, and any record showing it had resolved. Look for objective changes, like a new MRI finding that didn't appear on older imaging.

How to Use a Medical Chronology in Your Case

Demand letter. The chronology gives you the treatment story, the causation statements and the medical specials in one place. Our guide to writing a personal injury demand letter covers how to turn it into a demand that gets a response.

Depositions. Use the chronology to build outlines for the client, treating physicians and defense medical examiners. Page cites let you pull the exact record during questioning.

Expert review. Treating doctors and medical experts can review the chronology to get up to speed before giving an opinion.

Settlement. The charges column and lien notes feed the settlement statement. Our post on how personal injury settlements are distributed explains how fees, costs and liens come out of the gross settlement.

Common Medical Chronology Mistakes

Sorting by date received instead of date of service. The timeline stops making sense.

Leaving out page cites. An entry without a source can't be checked or used.

Copying whole notes. Long entries hide the facts that matter. Summarize.

Adding opinions. Words like "clearly caused by the accident" belong in the demand, not the chronology.

Ignoring prior records. The defense will find them. Document them first.

Skipping imaging and test results. Objective findings are often the strongest evidence of injury.

Mixing date formats. Pick one format and use it everywhere.

Not updating it. A chronology that stops at the first batch of records is out of date by the time you draft the demand.

Medical Chronology Checklist

Before the chronology goes to the attorney, check that:

Copy checklistPrint checklist

• All providers from the client interview have records requested and logged
• Records are Bates-numbered and duplicates removed
• Entries are in order by date of service
• Every entry has a source page
• Diagnoses and imaging results are included
• Causation statements are quoted word for word
• Gaps in treatment are logged with length and reason
• Missing records are logged with a re-request date
• Prior history for the same body parts is documented
• Charges are added and totaled
• Header shows "records received through" date and version number
• A second person has checked entries against the source pages

Frequently Asked Questions