Professional Malpractice (General) Expert Witnesses: 121

Dr. Keith Chamberlin is an award-winning Anesthesiologist in active clinical practice. Georgetown educated, he is a former Dartmouth Faculty member and current Fellow of the American Society of Anesthesiologists. He is a former Hospital Chief of Staff and Decorated United States Army veteran.

Litigation Support - Dr. Chamberlin is available to serve as an expert witness on cases involving anesthesiology standard of care and causation.  He also has significant medical management experience, having served as the CEO of multiple medical groups and an accountable care organization (ACO). As such, he is also available to serve as an expert witness on cases involving physician credentialling, provider agreements, physician employment contracts, healthcare billing and fraud, safety, quality, etc.

Dr. Chamberlin offers expert witness services to attorneys representing plaintiff and defense. He is an experienced expert witness at both deposition and trial. His services include medical record review, thorough reporting, deposition, and testimony as needed.

Areas of Expertise:

Intubation Central Line Difficult Airway Anesthesia Positioning Capnography Pre-operative Anesthesia Ambulatory Surgery Laryngospasm Propofol PACU Nurse Anesthetist

Recovery Room Hospital Administration Safety Quality Medical Billing Local Anesthetic Systemic Toxicity LAST Healthcare Fraud Credentialing Healthcare Provider Agreement ACO Physician Employment Contract

Bryan L. Parker, CPA/PFS, CFP, CLU, ChFC, CASL, FCPA, is a Certified Forensic Accountant with over 30 years of experience in his field. Background - Prior to founding Bryan L. Parker, CPA, LLC, Mr. Parker held the position of CFO at McPherson Oil Company ($300 million + annual revenues) where he was responsible for advising and negotiating banking relationships, acquisition review, acquisition integration, financial reporting, and interaction with external auditors. His experience also includes serving as VP of Mergers & Acquisitions for Citation Corporation (Public Co.) and CFO of TIC United Corp., Dallas, TX ($300 million + revenues).

Mr. Parker has performed business valuations for more than 100 businesses in a variety of industries including manufacturing, trucking, printing, fuel oil distribution, motor/lubricating oil distribution, professional services, restaurants, fast food franchises, metal foundry, metal forge, machining, and plastic injection molding.

Litigation Support - Mr. Parker provides expert witness services to attorneys representing both plaintiff and defendant. He offers Forensic Accounting services, written reports, deposition, and trial testimony as needed.

Areas of Expertise:

Forensic Accounting Money Tracing Business Valuations

Divorce Settlements Business Damage Analysis Earning Capacity

View Bryan Parker's Consulting Profile.

Marguerita M. Cheng, CFP®, CRPC®, RICP®, Chief Executive Officer at Blue Ocean Global Wealth, is a Certified Financial Planning Expert with 18 years of experience. Prior to co-founding Blue Ocean Global Wealth, she was a Financial Advisor at Ameriprise Financial and an Analyst and Editor at Towa Securities in Tokyo, Japan. Ms. Cheng is a past spokesperson for the AARP Financial Freedom Campaign and a regular columnist for Investopedia & Kiplinger. She is a CFP® professional, a Chartered Retirement Planning CounselorSM, a Retirement Income Certified Professional® and a Certified Divorce Financial Analyst. As a Certified Financial Planner Board of Standards (CFP Board) Ambassador, Ms. Cheng helps educate the public, policymakers, and media about the benefits of competent, ethical financial planning. She served on the Financial Planning Association (FPA) National Board of Directors from 2013 – 2015 and is a past president of the Financial Planning Association of the National Capital Area (FPA NCA). 

Marguerita Cheng CNBC Interview on Social Security 

Awards and Honors - Ms. Cheng is a recipient of the Ameriprise Financial Presidential Award for Quality of Advice and the prestigious Japanese Monbukagakusho Scholarship. In 2017, she was named the #3 Most Influential Financial Advisor in the Investopedia Top 100, a Woman to Watch by InvestmentNews, and a Top 100 Minority Business Enterprise (MBE®) by the Capital Region Minority Supplier Development Council (CRMSDC).

Litigation Support - Ms. Cheng serves as a Women’s Initiative (WIN) Advocate and subject matter expert for CFP Board, contributing to the development of examination questions for the CFP® Certification Examination. She also volunteers for CFP Board Disciplinary and Ethics Commission (DEC) hearings. Services to attorneys representing plaintiff and defendant include financial due diligence, thorough reporting, depositions, and trial testimony as needed.

Areas of Litigation Expertise:

Financial Planning Issues Social Security Elder Financial Abuse

Financial Planner Standard of Care Financial Planner Code of Ethics Investor Rights

Elbridge F. Bills, MD, FACOG, is a board certified OB/GYN with over 20 years of clinical experience in Obstetrics & Gynecology. Dr. Bills is a graduate of Emory Medical School and received a Master's degree in Metabolic & Nutritional Medicine from the University of South Florida.

With a full-time practice caring for and managing low and high risk pregnancies and deliveries, Dr. Bills also has an active gynecological practice including hysteroscopic, laparoscopic, and robotic procedures. He is licensed in both Georgia and Florida.

Dr. Bills is Board Certified by the American Board of Obstetrics and Gynecology, a member of the American Association of Gynecological Laparoscopists, the American Institute of Ultrasound in Medicine, and the International Society of Ultrasound in Obstetrics and Gynecology.

Litigation Support - Dr. Bills offers expert witness services to attorneys representing plaintiff and defense. He is available for cases involving medical malpractice and other OB-GYN related injuries. His services include medical record review, thorough reporting, depositions, and trial testimony as needed.

Areas of Expertise:

Normal & High Risk Pregnancies Hysteroscopic Gynecology Laparoscopic Gynecology Reconstructive and Robotic Surgery

Gynecological Ultrasound Integrative Medicine Hormone Therapy Testosterone Therapy

Gerald W. Smetana, MD, Board Certified in Internal Medicine, is a General Internist with 38 years of experience in an academic primary care practice at Beth Israel Deaconess Medical Center in Boston. He is also a Professor of Medicine at Harvard Medical School where he has taught internal medicine to medical house staff and also teaches extensively to practicing clinicians in continuing medical education settings. Dr. Smetana is a Master of the American College of Physicians.

Practicing in an outpatient setting, Dr. Smetana cared for a panel of patients that was weighted towards those with multiple chronic illnesses and high disease complexity. In addition to all aspects of office based general internal medicine, his areas of interest include Preoperative Medical Evaluation, Hypertension, and Headache.

Dr. Smetana has been repeatedly selected as a Best Doctor in a national survey. He publishes in the peer reviewed medical literature and medical texts, has edited textbooks, and has helped to develop national guidelines on topics in internal medicine. He has been invited to deliver seminars and presentations on various topics within his area of expertise nationally and internationally. He has been a section editor for the Annals of Internal Medicine. In April 2025, Dr. Smetana retired from clinical practice, but remains active in scholarly work, lecturing, and consulting.

Litigation Support - Dr. Smetana reviews cases for both plaintiffs and defendants and has testified at deposition and at trial as an expert on numerous occasions in most states in the eastern United States. He has reviewed medical malpractice cases over the past 20 years both for plaintiffs and doctors. Dr. Smetana also consults for risk management insurers. His record review and medicolegal consultation services are available throughout the United States.

Monica M. Argumedo, MD, is a Board-Certified Forensic and Clinical Psychiatrist (ABPN). Dr. Argumedo has testified about her forensic opinions in more than 40 cases in open court. In psychiatric practice for more than 15 years, Dr. Argumedo teaches at Rush University Medical School/Rush University Medical Center as Assistant Professor in Psychiatry. She teaches psychiatry residents in topics related to psychiatry and the law, and psychiatry in medicine. She also interviews prospective medical students through her role on the Medical Admissions Committee.

Dr. Argumedo works with Employers in cases where mental health/psychiatric concerns about an employee require an objective and unbiased Fitness for Duty Evaluation and report. She also consults in employment matters and litigation and serves as a disclosed expert witness. Her work addresses fitness for duty (FFD) in a litigated environment, Wrongful Termination, and Psychiatric Disability. Additional experience includes FFD of peace officers and first responders.

Services - Forensic Psychiatry, Medico-Legal evaluations, medical complications, review of records, written reports, deposition testimony, trial testimony, consultation to attorneys addressing psychiatric issues relevant in a case, opposing counsel expert reports or expert qualifications, assisting with cross-examination questions, and lines of inquiry.

Areas of Expertise:

Fitness for Duty Wrongful Termination Psychiatric Disability Depression Anxiety PTSD Competency Dementia Cognitive Behavior Emotional Distress

Pain and Suffering Standard of Care Institutional Care Medical Malpractice Discrimination Harassment Hostile Workplace Pre-employment Evaluation Security-sensitive Security Clearance

Architectural Forensics Consulting is a team of highly skilled professionals is committed to delivering exceptional services in Architectural Forensics. They are a trusted forensic and consulting company with over 50 years of combined professional experience throughout the US. ArchiForensics offers a range of expert witness, building-related claim defense, building enclosure commissioning, architectural review consulting, and due diligence actions for property acquisition.

Litigation Support - Architectural Forensics Consulting opines on professional practice issues, Architect’s standard of care, contract dispute, breech of duty, and other practice areas often encountered in claims involving the Architect’s performance or construction related issues. With years of experience and a team of experts who are actively practicing Architects with current AIA, NCARB, BECxP, and CSI accreditations, they provide top-notch analysis and reporting to help clients make informed decisions about their particular case or project.

Areas of Expertise:

Building Design and Construction Architectural Review Construction Defects Building Enclosure Failure Property Condition Assessments ADA Evaluations Water Infiltration

Roof Failure Window Failure Microbial Growth / Mold Failure Analysis Slip Trip & Fall Moisture / Condensation Issues Flood Damage, Building Inspection

Dan Weekes, AIA, NCARB, BECxP, CxA+BE, has over 25 years of Architectural and Engineering Building Envelope and consulting project management as well as litigation and deposition proceedings.

Mr. Weeks is responsible for many different types of investigations, forensic evaluations, and providing consulting services surrounding all areas of building design and construction. His focus is serving as an expert witness, building enclosure evaluations and commissioning, water infiltration investigations, architectural review consulting, property condition assessments, ADA evaluations, and construction administration services associated with construction and design.

As a licensed Architect, he also has experience with the design of new facilities and the implementation of repair programs to existing residential, commercial, and institutional facilities.

Jim Stutzman, AIA, NCARB, CSI has over 45 years of exceptional Building Construction and Investigative Design work with an emphasis on expert litigation cases and design coordination.

Mr. Stutzman is a Forensic Architect providing forensic analysis of building related claims, moisture intrusion claims, component problem and failure analysis, standard of care evaluation, dispute resolution, construction products liability, investigative analysis, reconstruction, cost-impact analysis and supporting documentation, timelines, and exhibits supporting claims for losses and remedy determination in courtroom and private settlements.

Forensic consulting services are focused on defense attorneys, insurance companies, financial institutions, developers, municipalities, and private clients.

View Architectural Forensic Consultants Business Consulting Profile.

ARCHforensic specializes in providing Forensic Architecture, Forensic Engineering, and Construction Claims Services to help clients navigate the construction litigation process. While construction is complex, their experienced forensic architect and engineer professionals understand client needs and objectives. They are focused and committed to excellence in each project while exceeding expectations.

Christopher D. Ling, IA, NCARB, PP, LEED AP, is a Forensic Architect with extensive experience in construction litigation, risk management, and architectural design. He specializes in analyzing and resolving complex construction disputes, having written reports for over 1,000 cases involving $1 billion in claims. He has testified in mediations, arbitrations, and federal court cases.

Mr. Ling has an ability to distill and communicate intricate design and construction issues clearly has been instrumental in mediation, arbitration, and court proceedings. He has a hands-on approach to conducting physical inspections, preparing expert reports, and analyzing construction claims, which further solidifies my qualifications.

Areas of Expertise

Forensic Investigations Cost Estimating Construction Administration Architectural Risk Assessment Risk Management ADA Compliance

Code Analysis Building Envelope Master Planning Physical Inspections Construction Disputes Construction Defects

Background Experience - Mr. Ling has been involved in the construction industry since 1986, holding multiple architectural licenses and national certifications. His experience spans forensic investigations of construction defects, code analysis, master planning, and risk management for projects of all scales. Additionally, Mr. Ling published a book on the Architect’s Standard of Care and have presented seminars for legal and professional organizations.

MCS Associates is a nationally recognized consulting group that has provided financial, operations and regulatory/compliance consulting services nationwide to financial institutions, insurance companies and regulatory agencies as well as real estate and financial services organizations for over 40 years. Expert Witness and Litigation Consulting are a primary focus of our services. We undertake expert witness assignments throughout the United States and our clients include several hundred leading law firms around the country, working on behalf of both plaintiff and defendant financial institutions, borrowers, depositors, investors, developers, insurance companies and their insured, securities/insurance/real estate brokers/agents, regulators and government agencies, and individuals. 

Together with MCS Associates’ specialized resources in banking, financial services and real estate, we also draw on key strategic alliances in insurance, economics, academia and the securities industry to meet a wide range of expert witness needs. Our litigation experts include experienced bankers, lenders, consultants, regulators, managers, brokers & agents in insurance, real estate, and securities; insurance claims and underwriting managers; economists, accountants, appraisers, real estate analysts, and academics. 

Areas of Expertise Include:

• Banking Operations/Administration
• Check Fraud
• Lending Policies, Custom and Practice
• Loan Underwriting & Credit Administration
• Loan Securitizations & Servicing
• Bankruptcy, Foreclosures and Workouts
• Trust & Fiduciary Issues / Operations
• Securities Brokerage & Investments
• Valuations & Damages Analysis
• Forensic Accounting
• Employment / Compensation
• Real Estate Brokerage & Management
• Title Insurance & Escrow
• Real Estate Appraisal & Transactions
• Insurance Industry Custom & Practice
• Insurance Coverages / Claims Handling
• Insurance Bad Faith

Paul M. Adler, DO, FACEP, MBA, Medical Director for the Ventura County, California, Department of Corrections, has worked in Correctional / Jail / Prison Medicine & COVID-19 Preparation & Response. He has overseen the care of inmates in Jails in California and New York, as well as Prison inmates who have been transferred to county facilities to serve their terms for years in county jails in California. He has also overseen Correctional health car in locked units in Hospitals . 

Dr. Adler is the President-Elect of The American Correctional Health Services Association of California / Nevada, which represents all clinicians and administrators in Jails/Prisons in California and Nevada. He previously oversaw a County Hospital, County Nursing Home and ran a County Health Department and oversaw Correctional healthcare for the Westchester, New York Jail.

Litigation Support - Dr. Adler has defended Jails and Prisons in Southern California, Idaho, Texas, North Carolina, New York, Pennsylvania, etc. He is currently the expert consultant to the California Prison System for Covid litigation and the medical consultant to the judicial consent decree overseeing care in the Philadelphia Department of Prisons. He also served as the expert consultant to the ACLU for Covid in the Illinois Department of Corrections

Dr. Adler still works as a full-time practicing physician and has helped attorneys and insurance companies in Emergency Medicine, Nursing Home Medicine, Public Health and Hospital Administration since 1985. He has been involved in Plaintiff litigation in many states including against Rikers Island, NY and Cook County Jail and is available to review and consult on clinical Correctional/Jail/Prison cases for attorneys for both Plaintiff and Defense.

Services:

• COVID-19 Preparation & Response
• Medical Oversight of Federal Consent Decrees
• Screen Cases for Merit
• Review, Analyze and interpret Medical Records
• Provide Basic or Comprehensive Written Reports
• Interpret Standards of Care, Deviation and Adherences as they Relate to Correctional Health Care
• Develop Chronological Time Lines
• Policy and Procedure Development

Dr. Andrew Mark Rodgers, BS, MS, DC, is a National Certifed Chiropractic Expert Witness with over 38 years of experience. He has worked on over 120 malpractice cases on the proper standard of care and has testified in 30 cases in the last 22 years. Dr. Rodgers is available for complimentary verbal evaluations, offers expedient affidavits and cost-effective testimonies and depositions for chiropractic deviation from standard of care cases nationwide. He represents both Defendant and Plaintiff.

Areas of Expertise

• Malpractice cases – proving standard of care and deviationsm, causation, and informed consent issues
• Administrative law, state laws, and honest medical protocols and billing procedures
• Plaintiff/defendant expert witness testimony in trauma cases, motor vehicle cases, workers comp cases and/or slip and fall injuries
• Insurance fraud
• Continues very active clinical practice

Ramzy Rimawi, MD, is American board certified in Internal Medicine, Infectious Diseases, and Critical Care Medicine. He has authored dozens of articles and given hundreds of lectures in the fields of IM, ID, and critical care. Dr. Rimawi is extremely well qualified in topics including sepsis, infections, critical care, and ethics.

 As an expert medical witness, Dr. Rimawi has reviewed hundreds of medical malpractice cases for both plaintiff and defense.

Dr Karthik Reddy Pammi, MBBS, MS (Orthopaedics)
Fellowship-trained orthopaedic surgeon performing 750+ robotic / computer-assisted knee and hip replacements and 300+ ACL / PCL/ shoulder arthroscopies each year at Apollo Hospitals, Chennai.

Expertise: 

Robotic TKA Alignment Errors, Early Loosening, Revision Arthroplasty, Tunnel Misplacement, Arthroscopy Complications, Implant Product Lability. Reports in =14 days; Zoom depositions U S-time; fees review $450/hr, depo $500/hr.

Dr. Ariel F. Grajales-Cruz, triple board-certified in Internal Medicine, Hematology, and Medical Oncology, specializes in multiple myeloma and advanced immunotherapies. An Assistant Member at Moffitt Cancer Center and USF faculty, he offers expert witness testimony, malpractice review, and litigation support. Author of 20+ publications, he lectures worldwide and is fluent in English, Spanish, and French.

Expertise in Myeloma, CAR-T, Immunotherapy & Malpractice Cases.

Expert Witness in Emergency Medicine, Urgent Care,  and Family Medicine Dr. W. Anthony Gerard is a Full time Emergency Physician and Assistant Clinical Professor of Family Medicine. He also practices in Rural and Urgent Care Medicine part time. Dr. Gerard has a special interest in Urgent care, Emergency medicine, family medicine,   Call Dr. Gerard for Prompt, Professional, Personal Service.