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See the 60-second demo →A medical-malpractice plaintiff typically does not see the coverage fight. The defense firm appears, files an answer, deposes the plaintiff, and the case proceeds. What plaintiff counsel rarely sees is the parallel battle happening between the hospital, the physician, the primary professional-liability carrier, the umbrella carrier, the hospital's self-insured retention, and (sometimes) a state patient-compensation fund — all arguing about which entity has the duty to defend and indemnify.
That coverage fight matters to plaintiff strategy. A case where the primary carrier disclaims and the secondary carrier picks up usually means lower available limits, more aggressive defense (because the secondary carrier is bearing the cost), and a tighter mediation posture. A case where the patient-compensation fund is involved means a state-specific cap is on the table that plaintiff's demand strategy must respect.
Here are the three coverage defenses that come up most often in medical-malpractice cases, and what they signal to plaintiff counsel.
Almost every professional-liability policy requires the insured to give "prompt" or "timely" notice of a claim or potential claim. The definition of "prompt" is policy-specific (often 30-90 days), and the trigger is policy-specific (some policies trigger on a "claim," others on a "potential claim" or "incident").
When a hospital or physician fails to report the incident until well after it occurred — sometimes years after, when the suit is finally filed — the carrier will reserve the right to deny coverage based on late notice.
Whether that defense succeeds depends on the jurisdiction:
For plaintiff counsel, the signal is: if you are seeing aggressive carrier-side discovery requests early in the case asking the hospital when it first knew about the incident, the carrier is building a late-notice record. The hospital's defense firm may also seem to be moving slowly — that's because they don't know yet whether their client will have coverage.
Most modern professional-liability policies are written on a claims-made basis: the policy in effect when the claim is reported covers it, regardless of when the underlying incident occurred. A few older policies, particularly hospital-system policies and some state-fund policies, are written on an occurrence basis: the policy in effect when the incident occurred covers it.
When a physician changes employers between the incident and the claim — or when a hospital changes carriers — coverage gaps appear. Tail coverage (extended reporting period endorsements) is supposed to fix this, but it often gets missed at carrier transitions.
A typical fact pattern: physician treats patient in 2022 with Carrier A on a claims-made policy. Physician leaves the hospital in 2023, does not purchase tail. Hospital changes carriers in 2024. Patient files suit in 2025. Neither Carrier A nor the new carrier wants the claim.
For plaintiff counsel, the signal is: when the answer is filed by an unfamiliar defense firm — not the panel firm your jurisdiction usually sees for that hospital — there's a good chance you're dealing with a coverage gap and a secondary or tail-coverage carrier is now in the picture.
Some policies distinguish between "bodily injury" coverage (general liability) and "professional services" coverage (professional liability). The distinction matters when the case involves something that could be characterized either way — slip-and-fall in a hospital, medication administration error in an outpatient clinic, a behavioral-health restraint injury.
Carriers will sometimes argue that the conduct alleged is not "professional services" but rather "premises liability" or "ordinary negligence," and therefore not covered by the professional-liability policy. The hospital then has to look to its general-liability carrier — which will counter-argue that the conduct was incidental to professional services and therefore not covered by the GL policy either.
This three-way fight (hospital v. pro-liability carrier v. GL carrier) can drag for months while the underlying medical-malpractice case sits stalled.
For plaintiff counsel, the signal is: pleading carefully matters. Including both "negligent professional services" and "negligent premises operation" as alternative theories preserves the broadest set of available coverage. Pleading too narrowly into one bucket lets the carriers fight about which one doesn't apply.
You usually cannot get the policies in early discovery without a court order, and most jurisdictions hold policy details out until coverage is reasonably in dispute. But you can:
Coverage disputes are a defense problem, but they shape every plaintiff settlement. Knowing what defense counsel is arguing about behind the scenes lets you set demand strategy that the actual decision-maker (the carrier) can act on.
— John Mahoney medicalai.law
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