Why Chiropractors Get Sued: The Neck Adjustment, the Artery, and the Stroke

By John Mahoney · June 2026 · 8 min read

Chiropractic liability has one catastrophic headline and a much larger, quieter body of work. The headline is the stroke: a cervical adjustment that precedes a vertebral artery dissection and leaves a previously healthy patient with a devastating neurologic injury. Those cases are rare, but they anchor every conversation about chiropractic risk and carry the highest stakes in the field. The larger body of claims is less dramatic and more common — a serious condition that presented as neck or back pain and went undiagnosed while the patient kept coming in for adjustments. An attorney who treats every chiropractic intake as a potential stroke case will miss the failure-to-refer file sitting in front of them, and an attorney who dismisses the specialty as low-stakes will undervalue the one catastrophic case that walks in. This guide explains where chiropractic liability actually lives, the cannot-miss failures behind it, and what separates a strong case from a weak one — for plaintiff and defense med-mal attorneys.

Disclaimer: This article is for informational purposes only and does not constitute legal advice. The figures below draw on closed-claims and insurer datasets that span different eras and definitions; treat them as directional, verify against the controlling jurisdiction, and value any individual case on its own record.

The Frequency-and-Severity Reality

Chiropractic is a relatively low-frequency liability field compared with high-risk physician specialties, and per-practitioner premiums have historically been a fraction of what surgeons and obstetricians pay. The volume of care is enormous — spinal manipulation is one of the most commonly delivered manual therapies in the country — yet the rate of serious adverse events per encounter is, by most accounts, low. The practical consequence is that chiropractors carry comparatively modest coverage limits, which directly shapes the collectability and valuation of any claim you take.

Severity, however, is bimodal, and that is the trap. The bulk of chiropractic claims are low-to-moderate in value — transient soreness, a rib or vertebral fracture, an aggravated disc — and many resolve without payment. Sitting on top of that distribution is a thin tail of catastrophic cases: the manipulation-associated stroke and the missed surgical emergency, each of which can produce permanent disability or death. Those rare files drive a disproportionate share of total indemnity and dominate the reported verdicts. The screening lesson is that two valuation models live inside this one specialty, and the first job on any intake is to decide which one you are looking at: a routine procedural-injury or aggravation file, or a catastrophic dissection or failure-to-refer file. The coverage limits, the experts, and the damages are entirely different.

The Dominant Allegation Types

Chiropractic claims cluster into an injury-from-manipulation group and a diagnostic-and-referral group, plus a consent thread that runs through both:

• Cervical manipulation causing vascular injury and stroke — the signature catastrophic allegation: a neck adjustment said to have triggered or worsened a vertebral artery dissection (VAD) leading to a posterior-circulation stroke. Low in frequency, but the highest-severity claim in the field.
• Failure to diagnose and refer — the most common serious-injury theory by volume: a patient whose neck or back pain was actually a surgical or vascular emergency that was treated with continued adjustments instead of being recognized and sent to a physician or emergency department.
• Manipulation of a contraindicated patient — adjusting a spine that should not have been adjusted (osteoporosis, malignancy, anticoagulation, ankylosing spondylitis, recent surgery, acute fracture) and causing or worsening injury.
• Lumbar manipulation causing disc herniation or cauda equina syndrome — a low-back adjustment said to have herniated a disc or precipitated nerve-root or cauda equina compression.
• Lack of informed consent / failure to disclose stroke risk — central to the cervical-manipulation cases and frequently pled alongside the negligence count.
• Scope of practice and failure to refer to an MD — treating beyond the appropriate scope, or persisting with conservative care past the point where physician referral was indicated.

The structural point: by count, chiropractic is a manual-therapy specialty whose routine injuries are modest, but by dollars, the vascular-stroke and missed-emergency claims dominate. Any intake should be triaged first on which side of that line it sits, because the merit analysis, the experts, and the damages are entirely different.

The Cannot-Miss Conditions and Failures

The conditions and failures that drive chiropractic litigation are:

• Vertebral artery dissection and stroke after cervical manipulation. This is the highest-severity exposure. The recurring fact pattern is a relatively young, otherwise healthy patient who presents with neck pain and headache, receives one or more cervical adjustments, and then suffers a posterior-circulation stroke. The hardest fight in these cases is causation — whether the manipulation caused the dissection, or whether the patient was already dissecting and the neck pain that brought them in was the dissection itself announcing it.
• Cauda equina syndrome — the spinal red-flag emergency: saddle anesthesia, bowel or bladder dysfunction, and bilateral leg weakness that demand urgent imaging and surgical referral, not continued manipulation. A missed cauda equina is a strong claim because the red flags are well-defined and the window to act is short.
• Spinal epidural abscess and spinal infection — fever, progressive pain, and neurologic change in a patient with risk factors, mistaken for mechanical back pain and adjusted instead of imaged and referred.
• Vertebral fracture — osteoporotic or pathologic — an adjustment delivered to a fragile or tumor-weakened spine, or a fracture missed on presentation, especially in older patients or those on long-term steroids.
• Spinal cord compression and metastatic cancer — progressive, non-mechanical, night-time or unremitting pain — the classic cancer red flags — treated as a musculoskeletal complaint while a malignancy or cord compression advances.
• Abdominal aortic aneurysm — back or flank pain that is actually an expanding or leaking aneurysm, manipulated rather than recognized as a vascular emergency.
• Lumbar disc herniation — a low-back adjustment said to have caused or aggravated a herniation, the most common manipulation-injury allegation below the catastrophic tier.

For the diagnostic-and-referral side, the single most actionable screening question is the red-flag question: did the record show a documented history and examination that screened for the spinal and vascular red flags, and when red flags were present, was the patient promptly referred out? A failure-to-refer claim very often turns on whether the chart documents that the warning signs were sought and acted on. For the vascular side, the decisive question is timing and the informed-consent record: what the patient was told about stroke risk before the neck was adjusted, and whether the presenting neck pain was itself the first symptom of a dissection already in progress.

The Contributing Factors That Drive Payouts

Across chiropractic claims, the recurring contributing factors are:

• Inadequate history and red-flag screening — the costliest factor: failing to take or document a history and examination that screen for the spinal and vascular red flags, which is what converts a missed cauda equina, abscess, fracture, tumor, or aneurysm into a paid claim.
• Failure to refer and delayed referral — continuing conservative manipulation past the point where the patient's failure to improve, or a new red flag, demanded physician evaluation. Delay between the warning sign and the referral is the lever that drives both liability and damages.
• Treating a contraindicated patient — performing manipulation on a spine that the record itself shows should not have been manipulated, which makes the breach close to self-proving once the contraindication is established.
• Informed consent and stroke-risk disclosure — whether the patient was told about the risk of dissection and stroke before a cervical adjustment; thin or generic consent is a recurring weakness in the vascular cases and is frequently pled as an independent theory.
• Causation evidence in the vascular cases — the dissection timeline, the imaging, and the neurology and vascular-surgery experts who reconstruct whether the adjustment caused the dissection or merely followed one already underway. This is where most cervical cases are won and lost.
• Documentation — incomplete records of the presenting complaint, the red-flag review, the consent discussion, and the clinical reasoning behind continuing care rather than referring, all of which weaken the defense.

Two of these are chiropractic-specific levers. The first is the referral timeline: in a failure-to-diagnose case, the gap between when a red flag appeared and when the patient was finally sent to a physician is often the difference between a defensible file and a large paid claim, because that delay is what allowed an abscess, a cord compression, or a cauda equina to progress. The second is the dissection-causation record in the cervical cases: the chart, the timing of symptom onset, and the imaging determine whether the manipulation can be tied to the dissection at all, and a strong defense will press the alternative that the patient arrived already dissecting.

Strong Case vs. Weak Case in Chiropractic

The same factors grade the file, and the framing is useful to both sides.

What makes a chiropractic case strong (plaintiff) / dangerous (defense)

• A previously healthy patient who suffered a documented vertebral artery dissection and posterior-circulation stroke close in time to a cervical adjustment, with thin or absent documentation that stroke risk was ever disclosed.
• A clear spinal red flag in the record — saddle anesthesia, bowel or bladder change, fever with progressive neurologic loss, or known malignancy — that was met with continued adjustments instead of urgent referral, with a documented delay before the eventual diagnosis.
• Manipulation of a patient whose own chart documents a contraindication (osteoporosis, anticoagulation, known metastatic disease, recent surgery), where the breach is close to self-proving.
• A loss-of-chance or delayed-diagnosis causation chain showing that timely referral would have produced a materially better outcome for the missed condition.

What makes a chiropractic case weak (plaintiff) / defensible (defense)

• A documented history and examination that screened for red flags, a consent discussion that disclosed the risk of stroke before cervical manipulation, and an appropriate referral once a warning sign appeared — the standard-of-care loop intact.
• A vascular case where the imaging and clinical timeline support that the dissection was already in progress when the patient presented — the neck pain was the symptom, not the consequence — undercutting causation.
• A routine manipulation injury (transient soreness, an aggravated but pre-existing disc) within the disclosed and accepted risks of care, framing the harm as a known complication rather than negligence.
• A patient whose record shows declined imaging, missed follow-up, or non-adherence that drove the delay, or a pre-existing condition that fully explains the outcome.

Chiropractic rewards a fast triage. On the vascular side, the case lives or dies on the dissection timeline, the imaging, and the informed-consent record — and the neurology and vascular experts who carry the causation fight. On the diagnostic-and-referral side, it turns on whether the red flags were sought, documented, and acted on, and on the loss-of-chance chain for the missed emergency. Whichever side you are on, grading the file means matching the right model to the right claim and pressure-testing the expert who will carry it.

Bottom Line

Chiropractors get sued less often than high-risk physicians, and most of the claims that come are modest manipulation injuries and aggravations that resolve without large payment. But the specialty hides a sharp severity spike: the cervical-manipulation stroke after a vertebral artery dissection, and the serious condition — cauda equina, spinal infection, fracture, cancer, aneurysm — that presented as ordinary neck or back pain and went undiagnosed while adjustments continued. The cannot-miss facts are the missed spinal or vascular red flag, the delayed referral to a physician, the manipulation of a contraindicated patient, and the consent that never mentioned the risk of stroke. Whether you are screening these cases for the plaintiff or defending them, triage first to the right model — vascular-stroke or failure-to-refer — and grade the file on the red-flag screening, the referral timeline, the dissection-causation record, and the documented consent, not on the visible injury alone.

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