Medical Chronology Template: Format & Example for Litigation Teams

"Where in the record does it say that?"

Every litigator has heard some version of this question. It comes from opposing counsel at a deposition. From a senior partner reviewing your summary judgment brief. Or from a judge who wants a citation, not a paraphrase.

This post gives you the format litigation teams use to build chronologies that hold up under that pressure. We'll walk through every column, show a filled-in example, explain the two columns most free templates leave out, and give you a step-by-step process for filling it.

You can download the template in Word or PDF, whichever your team works in.

What Is a Medical Chronology?

A medical chronology is a dated, source-cited table of medically significant events in a case. Built from the medical records, it captures encounters, complaints, diagnoses, treatments, medications, work restrictions, and the negative space between them: gaps in care, missed appointments, and findings that contradict each other.

The American Association of Legal Nurse Consultants (AALNC) describes a medical chronology as a written document summarizing pertinent information from medical records and explains that it may include the date and page number of the referenced information.[1] Its published example of an "attorney-friendly" chronology uses columns for date and time, source or provider, facts, LNC comments, and Bates number.[1]

Each entry in a working litigation chronology should therefore make four core facts easy to identify:

1. When the event happened

2. Who documented it

3. What the record actually says

4. The exact page or Bates number where it lives

That fourth item is what separates a working litigation document from a simple reading aid. More on that below.

Litigation teams use chronologies to establish causation, calculate damages, prepare for depositions, and find impeachment material. In personal injury, medical malpractice, and workers' comp cases, the chronology often becomes the spine of the entire case narrative.

Don't confuse it with a medical summary. A summary is a narrative overview written for orientation. A chronology is a structured, date-ordered document designed to let the reader trace an entry back to the underlying medical record. Summaries tell you what happened. Chronologies help you verify where it came from.

What a Court-Ready Medical Chronology Template Includes

A note on terminology: there is no universal U.S. legal standard called a "court-ready medical chronology." Here, court-ready means a chronology built for source verification and litigation use. Whether a chronology itself can be filed, shown to an expert, produced in discovery, or admitted as evidence is a separate legal question.

Plenty of free medical chronology templates floating around are just event lists: date, provider, what happened. That format collapses the moment someone asks where a fact came from.

AALNC's published model uses five core fields: date/time, source/provider, facts, LNC comments, and Bates number.[1] The template below adapts that structure for litigation teams by separating the analytical comments into two fields—Significance to Case and Flags.

A litigation-focused template has six columns:

The Source (Bates + Page) Column

This is the column that answers the question at the top of this post.

Every entry needs an exact source citation: the Bates number and the page where the fact lives. Not "Mercy records, March 2024." Not a vague record-range reference. A pinpoint cite you can use to return immediately to the underlying source.

This isn't just a formatting preference. AALNC's guidance recommends that medical-record pages carry identification numbers and explains the use of Bates numbering for sequentially identifying documents in discovery and trial preparation. In its chronology format, the Bates-number field identifies the medical-record page where the information was found. The article goes so far as to call the Bates number the "most important" field because locating the source becomes difficult when records are voluminous and that reference is missing.[1]

When a critical case-winning fact surfaces, someone walks it back to the source before anyone relies on it. If the citation is already taken into account in your chronology, verification takes seconds. If it isn't, someone in your team (or even you) is digging through a 3,000-page record set while the deposition clock runs.

Treat the source column as non-negotiable. Never write an entry without it.

The Flags Column

The entries that decide summary judgment and settlement value are often not the treatment events. They're the gaps, the no-shows, the contrary diagnoses, and the medication discontinuations.

AALNC's chronology model includes an optional comments field specifically for identifying red flags and important issues. Its guidance also emphasizes that the reviewer should remain objective and unbiased and should alert counsel to negative aspects of the case as well as information that may affect it positively.[1]

That makes the analytical layer important. Most chronologies record only what providers did. Litigation-grade chronologies should also make potentially adverse or contradictory information easy for the legal team to find.

Use a simple flag taxonomy:

• GAP — gaps in care and missed appointments

• CONTRA — findings that cut against your theory (or theirs)

• PRE — pre-existing condition references

• DISC — medication or treatment discontinuations

• AMEND — record amendments and addenda

This particular taxonomy is a practical convention for this template, not an AALNC standard.

Flagging negative or contradictory information is what makes a chronology more useful for litigation strategy. A timeline with no flags isn't necessarily clean. It may simply mean nobody categorized the problems.

Medical Chronology Example (Filled-In Template)

Here's what the template looks like with entries from a hypothetical motor vehicle accident case:

Look at entry 03. On its face, it supports causation: disc protrusion after an MVA. But the same page notes degenerative changes. An unflagged chronology presents this as a clean win. A flagged chronology tells the team, before the defense motion even lands, that this entry needs a response.

How to Create a Medical Chronology Step by Step

AALNC's published workflow starts before the chronology itself: identify the records needed, identify the patient's providers, continue adding providers discovered during review, assess whether the record set is complete, identify each record page, and then analyze the records for issues such as missing documentation, documentation errors, red flags, and other case-specific concerns.[1]

1. Inventory the records first

List every provider and Bates range before you extract a single entry.

AALNC specifically recommends identifying every provider involved and notes that provider identification can remain an ongoing process as the records are reviewed. It also recommends determining whether the records are complete. To be honest, This is something that may not become clear until substantive review begins.[1]

Chronologies fail most often because a relevant record set was never reviewed at all, more than because an individual entry was typed incorrectly.

2. Work provider by provider, not date by date

Extract each provider's records into the template in full, then sort the combined table chronologically. Jumping between providers is how dates drift and events merge.

The important principle is to establish an organized review process before combining the events into the final chronology.

3. Cite as you go

Never write an entry without filling in the source column.

AALNC recommends page-level identification of medical records and includes the Bates number as a core chronology field specifically so the underlying information can be found again.[1]

Hunting down citations retroactively introduces unnecessary risk. Capture the source when you capture the fact.

4. Record the negative space

Flag every missed appointment, every material treatment gap, every discharge against medical advice, and every contrary finding.

If your team uses a threshold such as a 30-day treatment gap, define that rule consistently for the case rather than treating it as a universal legal standard.

Use the taxonomy above.

5. Do a second pass for contradictions

Compare providers against each other, and where relevant compare the records against deposition testimony or other case evidence.

AALNC's guidance expressly identifies documentation errors, missing records, red flags, and other areas of concern as part of medical-record analysis, and stresses that the reviewer should communicate both positive and negative information objectively.[1]

This second pass is where inconsistencies that are easy to miss during straight extraction often surface.

6. Random-sample your own work

Pull 10 random entries and walk each back to the source pages. If any fail, audit the whole chronology.

This is a quality-control method for this template rather than a rule prescribed by AALNC. The principle is simple: if the chronology is designed to make every material fact traceable, test whether it actually does.

What a Medical Chronology Actually Costs to Fill

The template is the easy part. The expensive part is reading the records.

For multi-thousand-page record sets, manual medical-record review and chronology preparation can consume dozens of hours of legal-team time. Federal fee rulings provide a useful real-world benchmark. In Roman v. Colvin, a federal court reviewed 33.1 hours of work on a 1,904-page administrative record and noted that preparation of the medical chronology “comprised the bulk of the work on the file.”[2]

The workload rises with larger records. In Marissa D. v. Saul, the court found 40.6 hours reasonable for reviewing a 2,633-page record, preparing the medical chronology, and preparing the related motion.[3] In Winferd B. v. Saul, the court found 43.2 hours reasonable for comparable work involving a 2,841-page record.[4]

These cases are not universal billing standards, and the approved hours included work beyond chronology preparation alone. But they provide a useful benchmark for the scale of the problem: with multi-thousand-page medical records, manual review and chronology work can be measured in working days, not minutes.

And the work usually happens under deadline, compressed into whatever time remains before an expert deadline, deposition, mediation, or dispositive motion.

Outsourced chronology services shift the labor outside the firm, but the legal team still has to verify the finished work and integrate it into the case strategy.

This is the work newcase.ai automates. Upload the records and get a complete chronology: every event, every provider, every date, with source citations at page level. The platform flags gaps in care, contrary diagnoses, and record amendments automatically, which means much of the issue-spotting described in steps 4 and 5 above is surfaced before you begin substantive review.

Newcase has benchmarked the approach against 100,000+ manually reviewed pages, with complete extraction of critical facts and an average time to a completed chronology under 10 minutes.

If you want to feel the format first, download the free template in Word or PDF and run one case manually. Then run the next one through Newcase and compare.

Frequently Asked Questions

What should a medical chronology template include?

At minimum, a working chronology should make the date of service, provider or source, pertinent medical event, and exact source location easy to identify. AALNC's published attorney-friendly model uses date/time, source/provider, facts, LNC comments, and Bates number.[1]

This template adds separate Significance to Case and Flags columns so litigation teams can distinguish the underlying medical fact from their strategic analysis.

What is the difference between a medical summary and a medical chronology?

A medical summary is a narrative overview of a patient's treatment. A medical chronology organizes pertinent medical-record information by time and provides a structure for tracing facts back to their source.

AALNC describes a medical chronology as a written document containing a summary of pertinent medical-record information that may include the date and page number of the referenced information.[1]

Summaries are useful for orientation. Chronologies are working litigation documents that let the reader return to the underlying record for a particular entry.

How long does it take to prepare a medical chronology manually?

There is no universal time-per-page standard because complexity, record quality, number of providers, and the level of analysis required vary by case.

Federal court records nevertheless give a useful benchmark. Courts have found approximately 33–43 hours reasonable in cases involving roughly 1,900–2,800 pages where the work included medical-record review, preparation of a medical chronology, and related legal briefing.[2–4] In one of those cases, the court specifically noted that the medical chronology comprised the bulk of the work performed.[2]

For large record sets, the practical takeaway is that manual chronology work can require multiple working days of legal-team time.

Ready to skip the manual work? Run your first AI-built medical chronology free. Self-serve, no payment info required. SOC 2 Type II, HIPAA BAAs, zero data retention.

Newcase is the AI Litigation Intelligence platform that connects depositions, attorney behavior, expert testimony, and case facts into a single searchable intelligence layer.

Reference

[1] Jones, Moniaree Parker. “Strategies for an Effective Medical Chronology.” Journal of Legal Nurse Consulting 19, no. 3 (Summer 2008): 7–11. American Association of Legal Nurse Consultants. See especially pp. 9–11 for record completeness, Bates numbering, chronology formatting, source/provider identification, fact entries, LNC comments, red flags, and Bates references.

[2] Roman v. Colvin, No. 3:15CV00917(SALM), Ruling on Plaintiff’s Application for Attorney’s Fees, U.S. District Court for the District of Connecticut (Dec. 28, 2015). The court considered a 1,904-page administrative record and 33.1 hours of work, noting that preparation of the medical chronology “comprised the bulk of the work on the file.” View the ruling.

[3] Marissa D. v. Saul, No. 3:20CV00880(SALM), U.S. District Court for the District of Connecticut (June 23, 2021). The court found 40.6 hours reasonable for review of a 2,633-page record, preparation of the medical chronology, and preparation of the related motion. View the order.

[4] Winferd B. v. Saul, No. 3:20CV00306(SALM), U.S. District Court for the District of Connecticut (June 4, 2021). The court found 43.2 hours reasonable for review of a 2,841-page record, preparation of the medical chronology, and preparation of the related motion. View the order.