If a doctor's missed diagnosis has worsened your condition or delayed critical treatment, you need experienced legal representation to hold them accountable. CHH Law's Chicago medical misdiagnosis attorneys have over 40 years of experience securing compensation for patients harmed by diagnostic errors across the Chicago area, including our licensed physician-attorney who can review your medical records with clinical expertise.
At Cirignani, Heller & Harman, LLP, our law firm brings over 40 years of experience handling the most complex cases in Chicago, backed by a legal team that includes one licensed physician and a certified respiratory therapist who are also attorneys. Routine is the enemy of good medicine. When doctors assume that you have the flu because they've seen "hundreds" of such cases, when in fact you really have bacterial meningitis, their assumption of routine can lead to serious injury or death. When a misdiagnosis results in serious injuries, including traumatic brain injuries, spinal cord injuries, or other life-altering harm, CHH Law has the medical and legal firepower to pursue maximum compensation on your behalf.
identifying diagnostic errors other lawyers might miss. Evidence is critical in medical malpractice cases, including medical records and test results, and our team knows exactly what to look for in imaging studies, lab panels, and specialist reports.
where misdiagnosis causes serious harm - permanent disability, brain damage, organ failure, or wrongful death. Over 250,000 acts of medical malpractice occur annually in the U.S., and the cases that come to CHH Law are among the most devastating.
in your diagnosis. Misdiagnosis claims are often complex and require legal and medical expertise to navigate successfully, and our ability to evaluate clinical decision-making from the inside gives our clients a significant advantage.
from obtaining records and securing expert testimony to aggressive litigation - while you focus on your health and recovery.
Medical misdiagnosis takes many forms, from a negligent doctor who dismisses clear warning signs to a hospital that fails to run basic tests. Diagnostic errors account for approximately 26.6% of all closed malpractice claims nationwide, and medical malpractice is the third leading cause of death in the U.S. CHH Law represents injured patients across every category of diagnostic failure.
Cancer misdiagnosis is among the most devastating forms of medical negligence. When a healthcare provider fails to timely diagnose breast cancer, lung cancer, cervical cancer, colon cancer, or melanoma, the disease progresses - often from treatable to terminal. Our Chicago medical malpractice attorneys handle cases involving:
Failure to order appropriate screening tests or follow up on abnormal results
Misreading of imaging studies, biopsies, or lab results leading to delayed treatment
Dismissal of persistent symptoms without proper investigation
Research shows that cancer is one of five conditions responsible for nearly 39% of all serious harms from diagnostic errors, alongside stroke, sepsis, pneumonia, and venous thromboembolism.
When a doctor fails to recognize cardiac or neurological emergencies, the catastrophic consequences can include permanent disability, brain damage, or death. A 2022 systematic review found that approximately 5.7% of all U.S. emergency department visits involve at least one diagnostic error, with 0.3% resulting in permanent disability or death. Our firm handles:
Emergency room failures to recognize cardiac symptoms, especially in women
Misdiagnosis of stroke symptoms as less serious conditions like migraines or vertigo
Failure to order appropriate cardiac tests or brain imaging studies
In one Chicago-area case, a 37-year-old woman whose brain MRI and CT scans were misread permanent disability from an undetected artery dissection - a case that settled for $2.7 million.
Infections that go undiagnosed can escalate rapidly from treatable conditions to life-threatening emergencies. Sepsis, meningitis, and post-surgical infections demand immediate medical treatment, and when medical providers fail to recognize the signs, patients suffer severe consequences. We represent victims of:
Sepsis cases where early symptoms like respiratory distress were dismissed or misinterpreted
Meningitis misdiagnosis leading to permanent neurological damage or brain injuries
Post-surgical infections that were not timely recognized, leading to organ failure or patient's death
A complete failure to diagnose occurs when a healthcare provider overlooks a serious condition entirely - whether through negligent treatment, inadequate testing, or refusal to refer to a specialist. These cases often involve:
Dismissing patient symptoms without proper investigation, denying proper medical care
Failure to refer to appropriate specialists when clinical indicators demand it
Ignoring abnormal lab results, pathology findings, or imaging abnormalities
In a tragic Cook County case, a three-week-old infant was misdiagnosed with colic when the child actually had an undetected heart defect. The infant died, and the family received a $2.25 million wrongful death verdict.
Illinois medical malpractice law imposes strict procedural requirements that many firms struggle to meet. Illinois law requires a qualified healthcare professional to review case records before filing a malpractice lawsuit, and our medically trained attorneys give us a head start that translates into stronger cases.
Our medically trained attorney reviews all medical records and imaging studies to identify diagnostic errors - reading them the way a clinician would, not just a lawyer. We look for red flags: abnormal lab results that weren't followed up, imaging findings that were misread, symptoms that should have prompted a proper diagnosis but were ignored. We then obtain expert medical opinions from physicians in relevant specialties to establish what an accurate diagnosis should have been and when it should have been made.
We gather evidence, interview witnesses, and prepare the required affidavit of merit under Illinois law. A certificate of merit is required for each medical malpractice claim in Illinois, signed by a qualified medical professional confirming that the standard of care was breached and that the breach caused your patient's injury. We file your medical malpractice lawsuit within the Illinois statute of limitations deadlines - Illinois has a two-year statute of limitations for malpractice claims from the date of discovery, and the statute of repose in Illinois medical malpractice cases is four years from the date of the alleged malpractice.
We negotiate aggressively with insurance companies and hospital defense teams for fair compensation. If they refuse a reasonable settlement, we take your case to trial. Proving causation is vital in medical malpractice claims to establish the connection between the misdiagnosis and harm - and our medical background allows us to present that link persuasively to a jury. The average medical malpractice settlement takes 3-6 months to resolve, though complex cases may require longer.
Recent Chicago-area misdiagnosis verdicts and settlements demonstrate what's possible when medical malpractice victims have strong legal representation:
In April 2026, a Cook County jury awarded over $51 million to a 47-year-old patient whose doctors failed to test blood sugar despite obesity and a history of gout - a delayed diagnosis that caused the patient's condition to worsen dramatically
A child misdiagnosed with gastroenteritis instead of volvulus at a Chicago-area hospital suffered massive bowel damage, resulting in a $6.25 million settlement
A three-week-old infant wrongfully diagnosed with colic died from an undetected heart defect - $2.25 million wrongful death verdict in Cook County
Illinois imposes no caps on non-economic damages in malpractice cases, meaning compensation for medical malpractice in Illinois can include medical expenses, lost wages, pain and suffering, mental anguish loss, and loss of consortium without arbitrary limits. Illinois medical malpractice claims closed from 2015–2020 totaled 1,356, with a median indemnity for physician-related claims of $500,000.
CHH Law handles confidential settlements for families affected by cancer misdiagnosis, significant recoveries for delayed heart attack diagnosis resulting in permanent cardiac damage, and compensation for infection cases leading to sepsis and organ failure.
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CHH was absolutely awesome! The team came through for me and our family. They are professional, compassionate, informative, and thorough. They took the case, fought, and won. I highly recommend this firm if you want to win too.
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All of the CHH attorneys are exceptionally knowledgeable, and they confidently took our case, when many other big firms would not...and Dan Pylman won our case!
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A very different tone from the other legal firms. Dan Pylman fought and won for our family.
CHH Law represents medical malpractice victims throughout Chicago and the surrounding region, including patients treated at major medical centers across:
Chicago Loop, Lincoln Park, Wicker Park, and River North
North Side neighborhoods including Lakeview, Lincoln Square, and Rogers Park
South Side communities including Hyde Park, Bronzeville, and Bridgeport
West Side areas including Austin, Garfield Park, and Little Village
Surrounding Cook County suburbs and collar counties
Chicago hospitals received a low rating in healthcare quality, making experienced local Chicago medical malpractice attorneys who know the area's health care providers, courthouses, and jury pools essential to building the strongest possible illinois medical malpractice claim.
A valid medical misdiagnosis case requires proving four elements: that a doctor-patient relationship existed (Illinois law requires proof of a doctor-patient relationship in malpractice cases), that the medical professional breached the standard of care, that this breach caused your injury, and that you suffered actual damages. Not every medical mistake qualifies as malpractice - you must show that a competent provider in similar circumstances would have reached the correct diagnosis. Our medically trained attorney can review your medical records during a free consultation to determine whether malpractice occurred.
Under 735 ILCS 5/13-212, in Illinois, a medical malpractice claim must be filed within two years from when you discovered or reasonably should have discovered the malpractice. However, the statute of repose sets a hard deadline: no misdiagnosis lawsuit may be brought more than four years after the negligent act occurred, regardless of when it was discovered. Different rules apply for minors - up to eight years, but never beyond the minor's 22nd birthday. These deadlines are strictly enforced; missing them results in dismissal regardless of how strong your case may be.
Compensation for a successful medical malpractice case can include:
Medical bills and future medical expenses for additional treatment required due to delayed diagnosis or incorrect treatment
Lost wages and reduced earning capacity from a worsened medical condition
Pain and suffering and mental anguish caused by progression of an untreated condition, permanent injuries, or wrong medication
Wrongful death damages when a patient dies due to diagnostic failure
Illinois has no caps on non-economic damages in medical malpractice cases, meaning there is no artificial limit on what a jury can award for pain, suffering, and diminished quality of life. Financial compensation is determined by the severity of harm - settlements in Chicago medical misdiagnosis cases have ranged from hundreds of thousands of dollars to over $51 million.
Illinois law mandates an affidavit of merit to accompany a medical malpractice complaint. This affidavit must be prepared by a qualified medical expert who has reviewed your case and confirms that the standard of care was breached and that the breach caused harm. Filing without a proper affidavit can result in immediate dismissal. At CHH Law, our medical malpractice team - including our licensed physician-attorney - works alongside outside medical experts to build the strongest possible foundation before filing.
