A missed or delayed diagnosis can let a treatable condition get worse.
A wrong or late diagnosis is not automatically malpractice, but sometimes it is. For more than 40 years, Tim Chelpaty has reviewed cases across southern New Mexico where a diagnosis was missed, delayed, or never followed up on, and the delay cost the patient. An independent medical professional reviews the medical records before Tim decides whether to pursue a claim.
Getting it wrong is not the same as getting it wrong negligently
Diagnosis is genuinely difficult. Conditions present atypically, symptoms overlap, and a competent doctor working carefully can still reach the wrong conclusion. The law does not require a doctor to be right. It requires them to be reasonably careful. A diagnostic error becomes malpractice when the process that produced it fell below the accepted standard of care.
In practice, that usually means one of a few things. The symptoms warranted a test that was never ordered. The test was ordered and the result was abnormal, but nobody acted on it. The findings warranted a specialist and no referral was made. Or the patient returned repeatedly with the same worsening complaint and was sent home each time without the picture ever being reconsidered.
None of that is about whether the doctor guessed correctly. It is about whether they did the work that a careful clinician would have done with the same information in front of them. And because that work leaves a documentary trail — orders, results, notes, referrals, and the gaps between them — it is something a medical professional reviewing the chart can actually assess.
What a diagnostic claim has to prove
- A duty was owedA provider-patient relationship existed, so the provider owed you a professional standard of care.
- The diagnostic process was inadequateNot merely that the conclusion was wrong, but that reaching it involved a departure from careful practice.
- The delay changed the outcomeEarlier diagnosis would have led to a materially better result. This is the hardest element, and usually the contested one.
- There are real damagesMore invasive treatment, permanent harm, a worse prognosis, or a death that earlier care would likely have prevented.
How diagnoses go wrong
Diagnostic failures are rarely a single dramatic misjudgement. More often they are a process that broke down at an identifiable point, and that point is what the records reveal.
A Missed Diagnosis
The symptoms were reported and the results were in the chart, but the correct diagnosis was never reached at all.
A Delayed Diagnosis
The right answer came eventually, but only after the condition had progressed and the treatment options had narrowed.
A Wrong Diagnosis
The patient was diagnosed and treated for a different condition entirely, sometimes undergoing treatment they never needed while the real problem continued.
Misread Imaging or Pathology
Scans, slides, or specimens were reviewed but an abnormal finding was overlooked, misinterpreted, or never compared against prior studies.
Results Nobody Followed Up
An abnormal result came back and no one acted on it, or it was never communicated to the patient. One of the most common failures of all.
The Test That Was Never Ordered
The presentation called for a specific test or workup that a careful clinician would have ordered, and it simply was not done.
Failure to Refer to a Specialist
The findings warranted specialist evaluation, but no referral was made, or it came too late to change anything.
Discharged Without a Workup
A patient sent home from an emergency department or clinic with serious symptoms attributed to something benign, without the evaluation the presentation called for.
Repeat Visits, Same Answer
A patient who returns again and again with a worsening complaint and is given the same reassurance each time, without anyone reconsidering the diagnosis.
You will never be handed off to a junior associate or a call center. When you call this office, you get Tim. He is the same attorney who will see your case through to the end.
Conditions where timing changes everything
If you are experiencing symptoms now, seek medical care immediately — several of the conditions below are emergencies. What follows is about recognising, afterwards, when a delay may have been avoidable. It is not a guide to diagnosing yourself.
Some conditions tolerate a delay. These generally do not, which is why they account for so many diagnostic claims: the same error costs far more when the window for effective treatment is short.
Cancer
The most common category by some margin. A suspicious finding not investigated, a biopsy result not communicated, or screening not arranged. Stage at diagnosis drives treatment and outcome, which makes any delay consequential.
Heart attack and cardiac events
Chest pain attributed to indigestion, anxiety, or muscular strain, particularly where the presentation is less typical. Cardiac damage accumulates while the diagnosis is pending.
Stroke
Treatment for stroke is governed by a narrow window measured in hours. Symptoms attributed to migraine, intoxication, or fatigue can close it before anyone acts.
Sepsis and serious infection
Infection that is escalating systemically but is treated as ordinary illness. Sepsis worsens quickly and the cost of a delayed recognition is severe.
Blood clots and pulmonary embolism
Leg swelling or breathlessness attributed to something benign, in patients who often have identifiable risk factors sitting in their own history.
Appendicitis and acute abdominal conditions
Abdominal pain sent home without imaging or an adequate workup, where a rupture turns a routine operation into a serious complication.
Meningitis
Early symptoms resemble influenza, and the condition is most dangerous in the young. A delay in recognising it can be catastrophic and permanent.
Pregnancy complications
Including ectopic pregnancy and preeclampsia, where both mother and baby are at risk and where the warning signs are well established and well documented.
Proving the delay actually changed things
Most diagnostic claims are not won or lost on whether an error occurred. They are won or lost on what difference it made. The defense in these cases is rarely that the care was flawless. It is that the outcome would have been the same regardless: the cancer had already spread, the condition was already advanced, the patient would have deteriorated anyway.
Answering that requires reconstructing a counterfactual — what the patient's course would most likely have been had the diagnosis been made when it should have been. That is a medical opinion built from staging, imaging, the documented progression, and the accepted treatment pathway for the condition at the point it should have been caught.
It is also why these cases need a medical professional involved from the beginning rather than after a claim is filed. Whether the delay was consequential is a clinical question, and the honest answer is sometimes that it was not. Where that is the case, you will be told so early, before anyone has invested years in it.
- When the diagnosis should have been madeThe point at which a careful clinician, with the information available, would have identified the condition.
- What the outcome would likely have beenThe treatment that would have been available then, and the course that would most likely have followed.
By the numbers
Past results do not guarantee future outcomes. Amounts reflect prior matters; every case depends on its own facts, liability, injuries, insurance, and the law.
Settlements and verdicts won across medical malpractice and personal injury claims.
More than 40 years representing injured clients across southern New Mexico.
Rated by clients for communication, results, and support throughout their case.
How we build a misdiagnosis case
We assemble the complete record
Every visit, order, result, note, and referral across each provider involved. Diagnostic cases usually span several clinicians, and the failure often sits in the gaps between them.
We build the timeline
What was reported, what was found, and what was done at each point. Laid out in order, a diagnostic failure usually becomes visible as a specific missed moment.
A physician reviews the medicine
An independent medical professional examines whether the diagnostic process met the standard of care, and whether an earlier diagnosis would have changed the outcome.
We prepare the case for a fight over causation
The defense will argue the result was inevitable. Tim builds every case expecting that argument and prepares as though a jury will decide it.
“They never missed a beat. The communication was excellent and timely, way above what we expected. I would recommend anyone in need of legal services call Tim Chelpaty.”Chris S. · Las Cruces, NM · via Lawyers.com
Would an earlier diagnosis have changed things?
That is the question these cases turn on, and it is not one you can answer from the outside. If you think a diagnosis came too late, our plain-English guide walks through the warning signs and when it is worth having the records reviewed.
Answers about misdiagnosis claims
Diagnostic cases raise questions that do not come up in other malpractice claims. These are the ones Tim hears most often.
Visit the Resource Center →Not on its own. Diagnosis is difficult, and a careful doctor can still be wrong. What matters is whether the process fell below the accepted standard of care: whether the indicated test was ordered, whether an abnormal result was acted on, whether a referral was made. That is what the medical review examines.
It can. The question is whether the delay changed your outcome — whether earlier diagnosis would have meant less invasive treatment, a better prognosis, or survival. Where the delay made no material difference, there is generally no claim, and you will be told that.
Through medical opinion built on the record: the staging or progression documented over time, the imaging, and the treatment that would have been available at the point the diagnosis should have been made. It is a clinical reconstruction, which is why a medical professional is involved from the start.
Possibly more than one, and sometimes the failure belongs to the handoff rather than to any single clinician. Diagnostic cases frequently span a primary care physician, an emergency department, a radiologist, and a specialist. Establishing who is answerable is part of building the claim.
That may be true, and rarity is a legitimate part of the analysis. But it does not excuse failing to order an indicated test, failing to follow up an abnormal result, or failing to refer. A rare condition and an inadequate workup are separate questions.
Yes. Where a delayed or missed diagnosis contributed to a death, a claim may be brought on behalf of the estate or family, and New Mexico has its own rules about who may do so and what may be recovered. Deadlines in these situations matter more than usual, not less.
Nothing. The initial case review is free and confidential, and Tim handles these cases on a contingency fee basis. You pay no attorney fee up front, and none at all unless he recovers for you.
Think a diagnosis came too late?
Tim offers a free, confidential case review across southern New Mexico. No obligation, no cost, and a straight answer about whether an earlier diagnosis would have changed things, from an attorney who has handled these claims for more than 40 years.