Skip to main content
An expert can testify about the standard of care of a "sub-specialist" in appropriate cases
Evidence

An expert can testify about the standard of care of a "sub-specialist" in appropriate cases

By Jason Tenenbaum 8 min read

Key Takeaway

Complete guide to medical malpractice expert witness standards in NY. Diel v Bryan case analysis shows cross-specialty options. Call (516) 750-0595.

Expert Witness Qualifications in Medical Malpractice Cases: A Comprehensive Guide for Long Island and NYC Patients

When facing a medical malpractice case in New York, one of the most critical decisions your attorney will make involves selecting qualified expert witnesses. At the Law Office of Jason Tenenbaum, P.C., our experienced Long Island and New York City medical malpractice attorneys understand that the qualifications of expert witnesses can make or break your case. Today we examine a pivotal decision that clarifies when specialists from related fields can testify about subspecialty standards of care.

The Landmark Case: Diel v Bryan and Expert Witness Standards

Diel v Bryan, 2010 NY Slip Op 02230 (4th Dept. 2010)

“We reject the contention of defendant that plaintiff’s expert witness, a board certified anesthesiologist, was not qualified to testify concerning the standard of care to be applied in evaluating defendant’s care and treatment of decedent with respect to the administration of anesthesia during a dental procedure. “he anesthesiologist possessed the requisite skill, training, knowledge and experience to render a reliable opinion with respect to the standard of care applicable to the administration of the anesthesia” in this case (id. at 1494; see Bickom v Bierwagen, 48 AD3d 1247). Although defendant’s expert in oral maxillofacial surgery testified that there were “separate rules for dentists only,” defendant failed to establish how the administration of anesthesia to decedent during a dental procedure required special training or differed in any material respect from the administration of anesthesia by a board certified anesthesiologist. Indeed, we note that, at the time of decedent’s procedure, the “separate rules” for acquiring a dental anesthesia certificate provided that a dentist could obtain certification to administer general anesthesia and parenteral sedation by completing “one year of post-doctoral [*2]training in anesthesiology acceptable to the epartment ” (8 NYCRR former 61.10 ).”

Jason’s Analysis: Cross-Specialty Expert Testimony

An expert in a main specialty can credibly opine on the expertise of an expert in a sub-specialty, where as here, the training is comparable.

Understanding Expert Witness Requirements in New York Medical Malpractice Law

The Diel v Bryan decision provides crucial guidance for medical malpractice cases throughout New York State, including Nassau County, Suffolk County, and the five boroughs of New York City. This ruling establishes important precedents about when medical experts from related specialties can provide testimony about standards of care.

In New York medical malpractice cases, expert witnesses must meet specific qualifications to provide testimony about standards of care. The key requirements include:

  1. Medical License: The expert must be licensed to practice medicine in New York or a similar jurisdiction
  2. Board Certification: Generally, experts should be board certified in the relevant specialty
  3. Training and Experience: The expert must have sufficient training and experience in the area of medical care at issue
  4. Knowledge of Standards: The expert must be familiar with the applicable standards of care

Cross-Specialty Expert Testimony: When It’s Permitted

The Diel v Bryan case demonstrates that New York courts will allow experts from related specialties to testify when certain conditions are met. This flexibility is particularly important for complex medical malpractice cases in Long Island and NYC where subspecialty care is involved.

Factors Courts Consider for Cross-Specialty Experts

When evaluating whether an expert from a related specialty can testify, New York courts examine:

  • Training Overlap: Whether the expert’s training included the relevant medical area
  • Professional Experience: The expert’s practical experience with similar medical procedures or treatments
  • Educational Requirements: Whether practitioners in the subspecialty receive similar foundational training
  • Procedural Similarities: How closely the procedures or treatments align across specialties

Anesthesia Administration: A Case Study in Cross-Specialty Standards

The dental anesthesia case in Diel v Bryan provides an excellent example of how medical training often overlaps across specialties. This is particularly relevant for medical malpractice cases in Long Island and New York City, where many procedures involve specialists working together.

Understanding Anesthesia Training Requirements

The court’s analysis in Diel v Bryan highlighted several important facts about anesthesia training:

  • Dentists seeking anesthesia certification must complete one year of post-doctoral training in anesthesiology
  • This training must meet standards acceptable to the Department of Education
  • Board-certified anesthesiologists receive extensive training in the same fundamental principles
  • The basic physiological principles of anesthesia remain consistent across different medical contexts

Strategic Implications for Long Island and NYC Medical Malpractice Cases

For patients pursuing medical malpractice claims in Nassau County, Suffolk County, and the New York City metropolitan area, the Diel v Bryan decision has several important implications:

Expanded Expert Witness Pool

This ruling potentially expands the pool of qualified expert witnesses available for medical malpractice cases. When subspecialty experts are unavailable or prohibitively expensive, attorneys may be able to use experts from related specialties with comparable training.

Cost-Effective Expert Selection

Medical malpractice cases often require significant financial resources, particularly for expert witness fees. The ability to use experts from related specialties can help make strong medical malpractice cases more financially viable for injured patients.

Faster Case Development

Finding highly specialized experts can be time-consuming. Having the flexibility to use experts from related fields can help accelerate case development and move claims toward resolution more quickly.

Common Medical Malpractice Scenarios Where Cross-Specialty Expertise Applies

Based on our extensive experience handling medical malpractice cases in Long Island and New York City, several scenarios commonly involve cross-specialty expert testimony:

Surgical Complications

Many surgical procedures involve multiple specialties. For example:

  • Cardiac surgeons and anesthesiologists working together during heart surgery
  • Orthopedic surgeons and radiologists collaborating on joint replacement procedures
  • Plastic surgeons and anesthesiologists during cosmetic procedures
  • General surgeons and gastroenterologists in abdominal procedures

Emergency Medicine Cases

Emergency room physicians often perform procedures typically associated with other specialties:

  • Emergency physicians performing minor surgical procedures
  • Emergency medicine doctors reading diagnostic imaging
  • ER physicians managing cardiac emergencies before cardiologist consultation
  • Emergency medicine practitioners handling pediatric emergencies

Diagnostic Errors

Many diagnostic errors involve overlapping areas of medical knowledge:

  • Radiologists and emergency physicians interpreting imaging studies
  • Cardiologists and internal medicine physicians diagnosing heart conditions
  • Neurologists and emergency medicine doctors evaluating stroke symptoms
  • Oncologists and various specialists diagnosing cancer

Challenges to Cross-Specialty Expert Testimony

While the Diel v Bryan decision expands possibilities for expert testimony, defendants in medical malpractice cases will continue to challenge cross-specialty experts. Understanding these challenges helps patients and their attorneys prepare stronger cases.

Common Defense Arguments

Defense attorneys typically argue that cross-specialty experts lack sufficient knowledge because:

  • Different specialties have unique standards and protocols
  • Subspecialty training provides specialized knowledge not available to general specialists
  • Professional organizations maintain separate standards for different specialties
  • Continuing education requirements vary between specialties

Overcoming Defense Challenges

Successful medical malpractice attorneys counter these arguments by demonstrating:

  • The expert’s specific training and experience in the relevant medical area
  • Similarities in educational requirements and professional standards
  • The expert’s familiarity with applicable literature and guidelines
  • Evidence that the medical principles involved are fundamental across specialties

The Importance of Early Expert Witness Selection

In Long Island and New York City medical malpractice cases, early identification and retention of qualified expert witnesses is crucial for several reasons:

Statute of Limitations Compliance

New York’s medical malpractice statute of limitations requires cases to be filed within specific timeframes. Having qualified expert witnesses available early ensures that:

  • Cases can be properly evaluated before filing deadlines
  • Certificate of merit requirements can be satisfied
  • Discovery can proceed efficiently once litigation begins
  • Settlement negotiations can be supported by credible expert opinions

Case Development Strategy

Expert witnesses play a crucial role in shaping case strategy by:

  • Identifying all potential claims and theories of liability
  • Advising on discovery priorities and document requests
  • Reviewing medical records and identifying key evidence
  • Helping attorneys understand complex medical issues

Working with Expert Witnesses: Best Practices

Successful medical malpractice cases in Nassau County, Suffolk County, and NYC require effective collaboration between attorneys and expert witnesses. Our experience suggests several best practices:

Thorough Expert Vetting

Before retaining an expert witness, attorneys should verify:

  • Current medical licensure and board certification status
  • Relevant training and experience in the medical area at issue
  • Previous expert witness experience and testimony history
  • Professional reputation and peer recognition
  • Availability for depositions, trial, and case development

Comprehensive Case Materials

Expert witnesses need complete information to provide reliable opinions:

  • All relevant medical records and diagnostic studies
  • Applicable medical literature and professional guidelines
  • Deposition transcripts from treating physicians
  • Hospital policies and procedures
  • Equipment maintenance and calibration records when relevant

Frequently Asked Questions About Medical Malpractice Expert Witnesses

Can any doctor serve as an expert witness in a medical malpractice case?

No. Expert witnesses must have appropriate training, experience, and knowledge in the relevant medical specialty. As the Diel v Bryan case shows, experts from related specialties may qualify if their training and experience overlap sufficiently with the medical care at issue.

How do I know if my potential expert witness is qualified?

Qualified expert witnesses should be board-certified in their specialty, have relevant clinical experience, and be familiar with the applicable standards of care. Your attorney should verify these qualifications and assess whether the expert’s background matches the specific medical issues in your case.

What if the defendant’s expert disagrees with my expert’s opinion?

Conflicting expert opinions are common in medical malpractice cases. The jury ultimately decides which expert’s opinion is more credible based on their qualifications, the foundation for their opinions, and their ability to explain complex medical concepts clearly.

Can expert witnesses from out of state testify in New York medical malpractice cases?

Yes, out-of-state experts can testify in New York medical malpractice cases, provided they have appropriate qualifications and are familiar with applicable standards of care. Many national experts have experience with New York medical malpractice law and standards.

How much do medical expert witnesses cost?

Expert witness fees vary widely depending on the expert’s qualifications, reputation, and the complexity of the case. Costs typically include review time, report preparation, deposition attendance, and trial testimony. Your attorney can provide estimates based on the specific experts needed for your case.

The Financial Reality of Medical Malpractice Expert Witnesses

Medical malpractice cases in Long Island and New York City require significant financial investment, particularly for expert witness fees. Understanding these costs helps patients make informed decisions about pursuing claims.

Typical Expert Witness Expenses

Medical malpractice expert witness costs typically include:

  • Record Review: $500-$800 per hour for reviewing medical records and case materials
  • Report Preparation: $2,000-$5,000 for comprehensive expert reports
  • Deposition Testimony: $600-$1,000 per hour for deposition attendance
  • Trial Testimony: $800-$1,500 per hour for trial testimony
  • Travel and Preparation: Additional costs for travel time and trial preparation

Managing Expert Witness Costs

Experienced medical malpractice attorneys employ several strategies to manage expert witness costs:

  • Selecting experts with the right qualifications at reasonable rates
  • Efficiently organizing case materials to minimize review time
  • Coordinating multiple expert opinions to avoid duplication
  • Negotiating fee structures that align with case development

Why Choose the Law Office of Jason Tenenbaum, P.C. for Your Medical Malpractice Case?

Medical malpractice cases involving expert witness testimony require attorneys with deep knowledge of both legal and medical principles. Our Long Island and New York City medical malpractice legal team offers:

  • Extensive Expert Networks: We maintain relationships with qualified medical experts across all specialties
  • Medical Knowledge: Our attorneys understand complex medical procedures, terminology, and standards of care
  • Strategic Case Development: We know how to build compelling cases using expert testimony effectively
  • Trial Experience: Our attorneys have successfully tried medical malpractice cases before juries throughout New York
  • Financial Resources: We have the financial capacity to retain top-quality expert witnesses

Don’t let questions about expert witness qualifications prevent you from pursuing a valid medical malpractice claim. The Diel v Bryan decision and similar precedents may provide more options than you realize for building a strong case.

If you or a loved one has been injured by medical negligence in Long Island, Nassau County, Suffolk County, or New York City, contact the Law Office of Jason Tenenbaum, P.C. today at (516) 750-0595. Our experienced medical malpractice attorneys will evaluate your case, identify qualified expert witnesses, and fight for the compensation you deserve. Time limits apply to medical malpractice claims, so don’t delay in seeking legal representation.

Jason Tenenbaum, Personal Injury Attorney serving Long Island, Nassau County and Suffolk County

About the Author

Jason Tenenbaum

Jason Tenenbaum is a personal injury attorney serving Long Island, Nassau & Suffolk Counties, and New York City. Admitted to practice in NY, NJ, FL, TX, GA, MI, and Federal courts, Jason is one of the few attorneys who writes his own appeals and tries his own cases. Since 2002, he has authored over 2,353 articles on no-fault insurance law, personal injury, and employment law — a resource other attorneys rely on to stay current on New York appellate decisions.

Education
Syracuse University College of Law
Experience
24+ Years
Articles
2,353+ Published
Licensed In
7 States + Federal

Long Island Legal Services

Explore Related Practice Areas

Free Consultation — No Upfront Fees

Injured on Long Island?
We Fight for What You Deserve.

Serving Nassau County, Suffolk County, and all of New York City. You pay nothing unless we win.

Available 24/7  ·  No fees unless you win  ·  Serving Long Island & NYC

Injured? Don't Wait.

Get Your Free Case Evaluation Today

No fees unless we win — available 24/7 for emergencies.