Independent forensic opinions on diagnostic validity, criteria application, differential diagnosis, and standards of care in Complex Regional Pain Syndrome litigation. Serving plaintiff and defense counsel in workers' compensation, personal injury, insurance defense, and complex injury matters.
The Central Problem
The Budapest Criteria require positive findings documented on physical examination across independent symptom and sign tracks. Patient-reported complaints satisfy symptoms. They do not satisfy signs. Most treating physicians who diagnose CRPS in litigation conflate the two — and their records reflect it.
The gap between a physician's diagnostic impression and a Budapest-compliant examination is where most litigated CRPS cases are decided. This practice exists to find that gap — precisely, methodically, and in terms that survive cross-examination.
Criterion-by-criterion review of treating physician records. Distinguishes documented examination signs from patient-reported symptoms. Identifies which domains are supported, which are absent, and where conflation has occurred.
Evaluation of causal chain between claimed mechanism and CRPS onset. Assessment of onset timing, intervening events, and mechanism-diagnosis consistency. Alternative causation review including comorbid conditions that mimic CRPS presentation.
Systematic critique of opposing expert methodology. Identification of documentation gaps, reasoning errors, and reliance on subjective reporting as objective findings. Applicable to both plaintiff and defense expert opinions.
Expert testimony confined to disclosed scope and grounded in documented medical literature. Opinions are rendered within reasonable medical probability and limited to the available record unless otherwise specified.
Record review vs. IME: A majority of CRPS-related legal questions — diagnostic validity, criteria application, causation analysis, and treatment appropriateness — can be addressed through comprehensive record review alone. Independent medical examinations are performed selectively, when current objective findings are legally material or when jurisdictional rules require examination. IME necessity is assessed on a matter-by-matter basis.
Adopted by the International Association for the Study of Pain, 2007. The accepted standard for CRPS diagnosis in clinical and forensic contexts. Both tracks — symptoms and signs — must be independently satisfied.
Sensory
Symptom: Reports hyperalgesia and/or allodynia.
Sign: Evidence of hyperalgesia to pinprick and/or allodynia to light touch,
deep somatic pressure, or joint movement — confirmed on examination.
Vasomotor
Symptom: Reports temperature asymmetry and/or skin color changes.
Sign: Temperature asymmetry or skin color changes observed and documented
by physician — not merely reported by patient.
Sudomotor / Edema
Symptom: Reports sweating changes and/or edema.
Sign: Evidence of edema, sweating changes, or sweating asymmetry
documented on examination — bilateral comparison required.
Motor / Trophic
Symptom: Reports decreased ROM, weakness, or trophic changes.
Sign: Decreased ROM, motor dysfunction (weakness, tremor, dystonia),
or trophic changes documented on objective examination.
Clinical diagnosis requires: symptoms in 3 of 4 categories AND signs in 2 of 4 categories, with no alternative diagnosis better explaining the presentation. Both tracks are independently required — symptoms alone are not sufficient.
Detailed chronological reconstruction of injury, symptom onset, evaluations, and treatment.
Explicit application of Budapest Criteria to documented examination findings — symptom and sign tracks evaluated independently.
Assessment of alternative diagnoses not considered or excluded by treating providers. Peripheral neuropathy, vascular pathology, small fiber disease.
Assessment of objective documentation quality — examination technique, bilateral comparisons, measurement specificity.
Opinions limited to disclosed scope, rendered within reasonable medical probability, confined to the available record.
This approach prioritizes clarity, restraint, and reproducibility — the qualities most likely to withstand cross-examination and serve the court. No advocacy. No outcome-based opinions. Opinions are not formed prior to record review.
A comprehensive forensic reference for attorneys handling CRPS matters. Covers the Budapest Criteria in operational detail, the most common documentation failure modes, three illustrative case reports with outcome analysis, a deposition framework for both treating physicians and opposing experts, and a litigation-readiness checklist attorneys can apply to any CRPS case.
Dr. Izeogu is a board-certified interventional pain management specialist and minimally invasive spine surgeon with clinical practices in New York and New Jersey. He specializes in the evaluation and treatment of complex regional pain syndrome, lumbar and cervical spine pathology, and trauma-related musculoskeletal injury.
His forensic work draws directly from active clinical practice. He performs the same interventional procedures he evaluates in litigation — stellate ganglion blocks, lumbar sympathetic nerve blocks, spinal cord stimulation, and radiofrequency ablation — which gives his opinions a clinical grounding that distinguishes them from those of reviewing physicians without active procedural practice.
Dr. Izeogu provides independent forensic opinions in both plaintiff and defense matters, with conflict screening on all matters. His approach is methodological, not adversarial — opinions are based on what the record demonstrates, not on the outcome a retaining party may prefer.
He has evaluated CRPS claims arising from motor vehicle accidents, workplace crush injuries, premises liability falls, and surgical complications. His patient population spans personal injury, no-fault, and workers' compensation — providing direct familiarity with the documentation patterns, provider behaviors, and treatment trajectories most commonly at issue in litigation.
Jurisdiction and licensure. Record-review opinions are not limited by state licensure and are available nationwide. IME services are jurisdiction-dependent and subject to applicable credentialing requirements. Dr. Izeogu holds active clinical licensure in New York and New Jersey. Multi-state IME availability through the Interstate Medical Licensure Compact (IMLC) is available upon request.
To discuss a potential matter, request availability, or obtain the CRPS Litigation Brief, submit an inquiry below. All inquiries are handled confidentially.
No outcome-based opinions are offered prior to formal engagement. CV and prior testimony disclosure are available upon retention.
Submission of an inquiry does not establish a physician-patient or attorney-expert relationship. Forensic consulting services only — not a medical treatment practice. Conflict screening is performed on all matters.