Locum Tenens Malpractice Insurance: Occurrence, Claims-Made, and Tail Coverage Explained

Quick Facts: Locum Tenens Malpractice Insurance

Introduction

Malpractice insurance is the locum tenens benefit that gets the least scrutiny and causes the most financial damage when something goes wrong.

Most locum physicians accept whatever coverage their agency provides without asking what type of policy it is, who owns it, or what happens when the assignment ends. Agencies rarely volunteer this information in detail — and in some cases the coverage structure benefits the agency more than it benefits you.

This guide explains the three policy structures you’ll encounter in locum tenens — occurrence, claims-made, and tail coverage — what each means for your exposure, and the questions you need to ask before signing any assignment contract. If you take one thing from this article, make it this: the type of malpractice coverage you have matters as much as whether you have it.

The Two Policy Types: Occurrence vs. Claims-Made

Every malpractice policy is built on one of two coverage triggers. Understanding the difference is the foundation of everything else in this article.

Occurrence Policies

An occurrence policy covers any incident that happens during the policy period — regardless of when the claim is actually filed. If you treat a patient on a Tuesday in March and a claim is filed two years later, an occurrence policy that was active on that Tuesday covers you. The coverage follows the event, not the filing date.

For physicians, occurrence coverage is the simpler and in many ways safer structure. Once the policy period ends, your coverage for that period is permanent. There is no tail to purchase, no gap to manage, and no exposure created by switching employers or ending an assignment.

Claims-Made Policies

A claims-made policy covers claims that are both made and reported during the active policy period. The incident must occur after the policy’s retroactive date, and the claim must be filed while the policy is still active. If your policy lapses or ends — for any reason — claims filed after that date are not covered, even if the underlying incident happened while the policy was active.

This is the structure most agencies use for locum tenens coverage, and it creates a specific and significant risk: the moment your assignment ends and the agency’s policy no longer covers you, any future claim arising from that assignment is unprotected — unless tail coverage is in place.

Tail Coverage: The Gap Most Locums Don’t See Coming

Tail coverage — formally called an Extended Reporting Period (ERP) endorsement — extends the reporting window of a claims-made policy after it ends. It doesn’t extend your active coverage; it gives you the ability to report claims that arise after the policy period for incidents that occurred while it was active.

In plain terms: tail coverage is what protects you from a claim filed six months after an assignment ends for something that happened during the assignment.

Why Tail Coverage Matters More for Locums

Employed physicians typically have continuous claims-made coverage through their employer. When they leave, the employer often provides tail coverage as part of the separation. The coverage chain is managed for them.

Locum physicians face a different reality. You may work with multiple agencies over the course of a year, each providing their own claims-made policy for their assignments. Every time an assignment ends, a potential coverage gap opens unless tail coverage is explicitly addressed. Most physicians don’t realize this until they’re between assignments and someone asks about their tail.

What Tail Coverage Costs

Tail coverage is priced as a function of the underlying claims-made premium. In standard malpractice markets, the range runs 100–200% of the annual premium — with a practical estimate of 1.2x to 2.2x the mature annual premium often cited as a working rule of thumb. On a $20,000 annual claims-made premium, that translates to roughly $24,000–$44,000 in tail cost.

Who Pays for Tail Coverage

This is where the details of your contract matter enormously. In locum tenens arrangements, tail coverage responsibility is handled inconsistently:

• Some agencies provide tail coverage automatically at the end of an assignment
• Some provide it only for assignments above a certain length
• Some require the physician to purchase their own tail
• Some contracts are silent on the issue entirely

Silent contracts are a red flag. If your contract doesn’t explicitly address tail coverage, you need to ask before you sign — not after the assignment ends. We cover contract review in detail in our locum tenens contract guide.

The Alternative to Tail: Nose Coverage (Prior Acts)

Tail coverage gets most of the attention, but there’s a lesser-known alternative worth understanding — especially for locums transitioning directly from one agency or assignment to another.

Nose coverage, formally called Prior Acts coverage, works from the other direction. Instead of extending the reporting window backward from your old policy, nose coverage allows your new policy to reach backward and cover incidents that occurred before the new policy’s start date — essentially picking up where the previous claims-made policy left off.

In practical terms: if you’re moving directly from Agency A to Agency B, ask Agency B’s insurer whether they will provide Prior Acts coverage going back to your original retroactive date. If they will, you may be able to avoid purchasing tail coverage from Agency A entirely — potentially saving you five figures in a single conversation.

Not every insurer offers nose coverage, and not every transition qualifies. But it’s a question worth asking before you write a check for tail.

How Agency-Provided Coverage Actually Works

Most locum staffing agencies provide malpractice coverage as part of the assignment package. This is standard across the major agencies and covers the basics for most standard assignments. But the mechanics of how that coverage is structured matter more than most physicians realize.

The agency holds the policy, not you. The coverage is tied to the assignment, not to your license. When the assignment ends, the policy — and its protections — end with it unless tail is addressed. You are not the named insured in the way you would be on a personally owned policy.

Modified Claims-Made: The Gold Standard

Some agencies — typically the larger, more established operations — now offer what are called Modified Claims-Made policies. These are claims-made policies where tail coverage is pre-funded by the agency as part of the arrangement. In effect, you get the lower premium rates that claims-made coverage offers combined with the walk-away security of an occurrence policy.

If an agency offers Modified Claims-Made coverage, that is a meaningful differentiator worth factoring into your agency evaluation. It eliminates the tail negotiation entirely and removes one of the most significant financial risks in locum tenens work.

Always Request Your Certificate of Insurance

Because locum agencies often aggregate large numbers of providers under master policies, the coverage limits assigned to any individual physician can function as an internal calculation rather than a clearly documented figure. Always request your Certificate of Insurance (COI) before an assignment begins. The COI shows the actual coverage limits assigned to your name and gives you documented proof of coverage — which matters both for credentialing and for your own records.

Questions to Ask Your Agency Before Accepting an Assignment

• Is the coverage occurrence-based or claims-made?
• If claims-made, what is the retroactive date?
• Is this a standard or modified claims-made policy?
• Who is responsible for tail coverage when this assignment ends?
• What are the per-occurrence and aggregate coverage limits?
• Am I covered for all procedures within my normal scope of practice?
• Can I have a copy of my Certificate of Insurance?

Coverage Limits: What’s Standard

Most agency-provided malpractice policies for locum physicians follow standard coverage limits, though these vary by specialty and risk profile. A common structure is $1 million per occurrence and $3 million aggregate — meaning the policy covers up to $1 million for any single claim and up to $3 million total across all claims in the policy period.

Higher-risk specialties — surgery, obstetrics, emergency medicine — may require or carry higher limits. If you practice in one of these specialties, confirm that the limits offered are appropriate for your scope of practice and consistent with what the facility requires for credentialing.

Occurrence vs. Claims-Made: Which Is Better for Locums?

Occurrence coverage is structurally simpler and eliminates tail risk entirely — which makes it preferable from a pure risk management standpoint. But the market reality in 2025–2026 is that claims-made policies dominate locum tenens arrangements. Most agencies provide claims-made coverage, and occurrence policies, while still available in some locum settings, are not the standard.

What this means practically: most locum physicians will work under claims-made coverage for most of their assignments. The goal isn’t to demand occurrence coverage — it’s to understand your claims-made policy completely, ensure tail coverage is addressed at every assignment transition, and ask about nose coverage whenever you’re moving directly to a new arrangement.

Data Transparency Statement

Malpractice insurance market data for locum tenens is not comprehensively aggregated in any independent public database. The tail coverage cost figures cited in this article — 100–200% of annual premium in standard markets, up to 250–300% in high-litigation states, with a practical estimate of 1.2x–2.2x the mature annual premium — are drawn from multiple insurance industry sources and are consistent across available references.

The characterization of claims-made coverage as dominant in current locum arrangements is based on agency guidance from CompHealth and corroborated by multiple locum tenens operational resources. CompHealth is an agency-controlled source and is cited here with that conflict of interest disclosed.

Specialty-specific annual premium figures for locum malpractice insurance are not cited in this article because no reliable, current, independent source was available that we would trust to publish as market benchmarks. We will update this section when verifiable data becomes available. This is the honest position.

Because locum agencies aggregate thousands of providers under master policies, the individual premium attributed to any one physician is often an internal calculation rather than a clearly documented figure. Always request your Certificate of Insurance to see the actual limits assigned to your name.