Dr. James Calvin “J. Calvin” Johnson is a board-certified orthopedic surgeon and expert witness specializing in independent medical examinations (IMEs), impairment ratings, and medico-legal case evaluations. Based in Oklahoma, he provides objective, evidence-based opinions for attorneys, insurance companies, and courts.
Dr. James Calvin “J. Calvin” Johnson is a nationally recognized, board-certified orthopedic surgeon and expert witness with more than 35 years of surgical experience and over 26,000 procedures performed. He specializes in independent medical examinations (IMEs), medical record reviews, and expert testimony, having completed more than 2,000 IMEs and participated in numerous legal proceedings.
After a distinguished clinical career, Dr. Johnson transitioned into full-time medical-legal work, providing objective, evidence-based opinions to attorneys, insurance carriers, and courts. Through MedLegal Authority, he now leads a growing network of subspecialty physicians and legal nurse consultants, delivering comprehensive medical insight for complex cases across multiple disciplines.
Every physician is a board-certified specialist with years of clinical experience.
Our evaluations and testimony are impartial, evidence-based, and defensible.
We deliver reports and testimony that are precise, practical, and easy to understand.
With both in-person and secure virtual evaluations, we serve clients nationwide.
While Dr. J. Calvin Johnson primarily provides orthopedic expertise, he also collaborates with a broader network of physicians and medical professionals when cases require additional subspecialty insight. Through MedLegal Authority, this network supports comprehensive case evaluations across multiple disciplines when needed.By broadening our reach, we ensure that legal teams have access to the right expertise for every case.
Dr. James Calvin “J. Calvin” Johnson specializes in orthopedic surgery and medical-legal services, including independent medical examinations (IMEs), medical record reviews, impairment ratings, and expert witness testimony. With over 35 years of clinical experience, he provides objective, evidence-based opinions for legal cases involving orthopedic injuries and conditions.
Dr. Johnson has extensive experience as an orthopedic expert witness, having completed more than 2,000 independent medical examinations (IMEs) and participated in depositions and courtroom testimony. His background includes over 26,000 surgical procedures, giving him deep clinical insight that supports accurate case evaluations.
An Independent Medical Examination (IME) is a neutral, third-party medical evaluation performed to assess injuries, diagnoses, and treatment plans in legal or insurance-related cases. Dr. Johnson conducts IMEs to provide objective findings that help attorneys, insurance carriers, and courts make informed decisions.
Dr. Johnson is typically retained by attorneys, insurance companies, and legal professionals who require expert medical opinions in orthopedic-related cases. His services are used in personal injury claims, workers’ compensation cases, and other legal matters requiring independent evaluation.
Yes, Dr. Johnson provides both deposition and trial testimony as part of his expert witness services. He presents clear, medically supported opinions based on thorough case review, helping legal teams understand complex orthopedic issues in a courtroom setting.
Our vision is to be the nation’s most trusted source for independent medical evaluations and expert testimony. With a foundation of clinical excellence and a growing network of subspecialty experts, MedLegal Authority is setting a new standard for medical-legal services.
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