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Meet Our Experts

James Weisberger, MD, FACP, FASCP

Chief Medical Officer, Executive Vice President, Laboratory Director

Dr. Weisberger is a board certified anatomic and clinical pathologist and recognized leader in hematopathology. He oversees all key laboratory operations and quality systems, and maintains BioReference Laboratories as an innovative, quality laboratory where patient care and laboratory safety come first. Dr. Weisberger strives to position BioReference as a leader in providing patient-centric, precision-based laboratory results and data analytics for best practice of patient care.

Dr. James Weisberger has authored more than 40 publications as abstracts or peer-reviewed journal articles, and is an active educator at the New York Medical College, where he serves as a Clinical Associate Professor of Pathology and Medicine. He is a Fellow and Member of the New Jersey House of Delegates for the College of American Pathology, and a Fellow of the American Society of Clinical Pathology. He is also a member of the New Jersey Society of Pathology and Association for Molecular Pathology. Dr. Weisberger was Chief Resident in Pathology at Westchester Medical Center and holds both a BS and MS from Stanford University, and an MD from the University of Pennsylvania.

Cancer Genomics Team

Bevan Tandon, MD

Director of Cancer Genomics

Dr. Tandon holds American Board of Pathology subspecialty board certifications in both molecular genetic pathology, and also hematopathology. His general certifications are in anatomic and clinical pathology. Dr. Tandon’s training in hematopatholgy consisted of an intensive fellowship and clinical instructorship at the University of Pittsburgh School of Medicine, under the guidance of WHO lead author Dr. Steven Swerdlow. His training in molecular genetic pathology was conducted at Washington University in St. Louis School of Medicine. Dr. Tandon completed his general residency training at Northwestern University Feinberg School of Medicine. Dr. Tandon is an active member of the Society for Hematopathology and the Association for Molecular Pathology.

Eric Antoniou, PhD

Assistant Director, Cancer Genomics

Dr. Antoniou earned his PhD from the University of Bordeaux, France. He was formerly the senior manager of Cold Spring Harbor Laboratory genome sequencing center. He also held management positions at Ginkgo Bioworks and The Jackson Laboratory. Prior to these positions, he was an Assistant Professor at the University of Missouri-Columbia. Dr. Antoniou has eighteen years of experience in genomics science, including nine years in next-generation sequencing.

Wojciech A. Swat, PHD, DABMGG, FACMG

Clinical Molecular Geneticist

Dr. Swat is a board certified clinical molecular geneticist holding certifications of American Board of Medical Genetics and Genomics (ABMGG) and European Board of Medical Genetics (EMBG). He joined GenPath in 2020 after a two decade-long tenure as Associate Professor of Pathology and Immunology, Washington University School of Medicine in St. Louis, MO. Prior to joining GenPath, he served as an Associate Medical Director of the Molecular Diagnostic Laboratory (MDL) of Barnes-Jewish Hospital where he was responsible for clinical case load, consultation to clinicians, CAP proficiency and validation testing, and training and education of medical students, pathology residents in AP/CP programs, and molecular and cytogenetics fellows during lab rotations.  His graduate training was conducted at the Basel Institute for Immunology with Harald von Boehmer, and his postdoctoral training at Harvard Medical School with Frederick W Alt. During his academic career, he has been distinguished as a Scholar of the Leukemia and Lymphoma Society and received several awards including Howard Hughes Medical Institute, American Cancer Society, Arthritis Foundation, and Irene Duggan/Irvington Institute scholarships. He contributed more than 100 research publications becoming one of the most highly-cited leaders in the field of immunology and cancer biology with over 11,000 literature citations (Google Scholar h-index 52, i10-index 75).

Zhixiong Xu, PhD, FACMG

Director, Cancer Cytogenetics

Zhixiong Xu is ABMGG-certified in clinical molecular genetics and clinical cytogenetics. He joined GeneDx in 2013 and served as Assistant Director of the Hereditary Cancer program. He received his BS in Biological Chemistry from Xiamen University and his PhD in Cell Biology from the Peking Union Medical College. He completed a postdoctoral fellowship in molecular oncology and was appointed Research Assistant Professor at the Vanderbilt-Ingram Cancer Center. While at the National Institutes of Health (NIH), he worked with Gary Felsenfeld in genetic and epigenetic regulation of gene expression and completed his medical genetics fellowship training at the National Human Genome Research Institute (NHGRI). Dr. Xu was a recipient of the Hope Street Kids Fellowship Award and the American Society of Hematology Scholar Award.

Hematopathology Team

Wojciech Gorczyca M.D

Director of Hematopathology

Dr. Gorczyca is a board certified pathologist, noted in his expertise in hematopathology and flow cytometry. He is a well-respected lecturer and author – he has published more than 70 peer-reviewed journal articles and texts books including Differential Diagnosis in Neoplastic Hematopathology, Flow Cytometry in Neoplastic Hematology, and Cytogenetics, FISH, and Molecular Testing in Hematologic Malignancies.

Rajendra Persad, M.B., B.S.

Hematopathologist

Dr. Persad is a board certified pathologist specializing in hematopathology. He completed his anatomic and clinical pathology residency at the University of Pittsburgh Medical Center in Pittsburgh, Pennsylvania, followed by a surgical pathology fellowship at University of Texas, MD Anderson Cancer Center, Houston, Texas and his hematopathology fellowship at the New York University School of Medicine in New York, New York. He received his medical degree from the University of the West Indies Faculty of Medical Sciences in Saint Augustine, Trinidad and Tobago. He is a member of the College of American Pathologists (CAP), the American Society of Clinical Pathologists (ASCP), and the American Society of Hematology (ASH).

Debbie Buzaid, M.D.

Hematopathologist

Dr. Buzaid is a board certified pathologist specializing in hematopathology. She was Chief Resident in Pathology at Duke University in Durham, NC and completed her hematopathology fellowship at Columbia University Medical Center in New York, New York where she subsequently practiced and served as an assistant professor of pathology and cell biology before coming to GenPath. She received her M.D. from Eastern Virginia Medical School in Norfok, Virginia. Dr. Buzaid has been a hematopathologist at GenPath for over ten years.

Po Shing Lee, M.D.

Hematopathologist

Dr. Lee is a board certified pathologist specializing in hematopathology. He completed his anatomic and clinical pathology residencies at the University of Medicine and Dentistry of New Jersey in Newark and at Saint Barnabas Medical Center in Livingston, New Jersey. Dr.  Lee did his hematopathology fellowship at New York University Medical Center in Manhattan, New York. He holds an M.D. from National Taiwan University in Taipei, Taiwan. Dr. Lee has over 15 years of pathology experience, has authored 17 publications, and is a member of the United States and Canadian Academy of Pathology (USCAP) and the American Society for Clinical Pathology (ASCP).

Joseph Weisensel, D.O.

Hematopathologist

Dr. Weisensel is a board certified pathologist specializing in hematopathology. He was Chief Resident in Pathology and completed his hematopathology fellowship at the University of Rochester Medical Center in Rochester, New York. He holds a D.O. from the New York College of Osteopathic Medicine in Old Westbury, New York. Dr. Weisensel has been a hematopathologist at GenPath for nearly ten years and is a member of the American Society for Clinical Pathology (ASCP).

Yinghua Pang, M.D.

Hematopathologist

Dr. Pang is a board certified pathologist specializing in hematopathology. She completed her anatomic and clinical pathology residency at St. Luke’s Roosevelt Hospital in Manhattan, New York, her hematopathology fellowship at Columbia University in Manhattan, New York and her women’s health fellowship at Montefiore Medical Center in the Bronx, New York. She holds an M.D. from Xiangya School of Medicine in Hunan, China. She is a member of the American Society for Clinical Pathology (ASCP).

Yan Fan, M.D.

Hematopathologist

Dr. Fan is a board certified pathologist specializing in hematopathology. She was Chief Resident in Pathology at UMDNJ-Robert Wood Johnson University Hospital in New Brunswick, New Jersey and completed her hematopathology fellowship she subsequently practiced and served as an assistant professor of pathology at New York University Medical Center. She received her M.D. from Capital University of Medical Sciences in Beijing, China. Dr. Fan has been a hematopathologist at GenPath for over ten years.

Dongjiu Ye M.D., Ph.D.

Hematopathologist

Dr. Ye is a board certified pathologist specializing in hematopathology. He completed his residency in anatomical and clinical pathology at Conemaugh Valley Memorial Hospital integrated to Temple University Hospital in Philadelphia, Pennsylvania and his hematopathology fellowship at MD Anderson Cancer Center in Houston, Texas. He received his M.D. from Sun Yat-sen University of Medical Sciences in Guangzhou City, Guangdong Province, China and has over 16 years of pathology experience.

Jotica Talwar, M.D.

Hematopathologist

Dr. Talwar is a board certified pathologist specializing in hematopathology. She completed her anatomic and clinical pathology residency at Brown University in Rhode Island and Saint Barnabas Medical Center in Livingston, New Jersey and her hematopathology fellowship at Temple University in Philadelphia, Pennsylvania. She received her M.D. from Maulana Azad Medical College, University of Delhi in New Delhi, India. She is a member of the United States and Canadian Academy of Pathology (USCAP), the College of American Pathologists (CAP) and the American Society of Clinical Pathologists (ASCP).

Sean Cote, D.O.

Hematopathologist

Dr. Cote is a board certified pathologist specializing in hematopathology. He completed his residency in anatomical and clinical pathology and his fellowship in hematopathology at Thomas Jefferson University in Philadelphia, Pennsylvania. He received his Doctorate of Osteopathic Medicine from Philadelphia College of Osteopathic Medicine in Philadelphia, Pennsylvania.

Liliana Alexa, M.D.

Hematopathologist

Dr. Alexa is a board certified pathologist specializing in hematopathology. She completed her residency in anatomical and clinical pathology at Pennsylvania Hospital – University of Pennsylvania Health System in Philadelphia, Pennsylvania and her fellowship in hematopathology and surgical pathology from New York University School of Medicine in New York, New York. She received her M.D. from Carol Davila University of Medicine and Pharmacy in Bucharest, Romania.

Liliya Feldman, M.D.

Hematopathologist

Dr. Feldman is a board certified pathologist specializing in hematopathology. She completed her residency in anatomical and clinical pathology at Rutgers New Jersey Medical School and received her M.D. from Kharkiv National Medical University in Kharkiv, Ukraine.

Solid Tumor Team

Luoquan Wang, M.D., MSc

Medical Director of Cytopathology/Chief of Anatomic Pathology Services

Dr. Wang is board-certified in anatomic pathology, clinical pathology and cytopathology. He received anatomic and clinical pathology residency training and served as Chief Resident in SUNY Downstate Medical Center, NY, followed by Cytopathology fellowship training in Montefiore Medical Center, NY. He worked as Assistant professor and Attending pathologist for four years in Albert Einstein Medical College/Montefiore Medical Center before joined BioReference Laboratory in 2008. He received MD degree from Hebei Medical University and MSc degree from Peking University , China. He published in peer-reviewed journals and presented in national and international conferences. He received professional awards and research grants. He is members of College of American Pathologists and United States and Canadian Academy of Pathology.

Justin Fender, M.D.

Surgical Pathologist, GI Pathologist and Cytopathologist

Dr. Fender is a board certified pathologist who signs out general surgical pathology and cytopathology and has expertise in gastrointestinal and liver pathology, as well as cytopathology. He completed his anatomic and clinical pathology residency at the Mount Sinai Medical Center in New York, NY, followed by a gastrointestinal and liver pathology fellowship at the University of Pittsburgh Medical Center and a cytopathology fellowship at the Medical University of South Carolina. He received his medical degree from the University of North Carolina at Chapel Hill School of Medicine.

Rajesh Butala, M.D.

Surgical Pathologist

Dr. Butala is a board certified pathologist specializing in Anatomic Pathology. He completed his anatomic and clinical pathology residency at the Brooklyn and Harlem Hospital center, New York, followed by a surgical pathology fellowship at North Shore University Medical center, Long Island, New York. He received his medical degree from the Gujarat University, India. He is a member of the College of American Pathologists (CAP), and the American Society of Clinical Pathologists (ASCP).

Buhalqem Kadire, M.D.

GYN Pathologist

Dr. Buhalqem Kadire is a board certified pathologist specializing in Obstetrics- Gynecology pathology. She completed her anatomic and clinical pathology residency at the University of Medicine and Dentistry at New Jersey (UMDNJ), followed by a gynecology pathology fellowship at Mount Sinai Hospital in New York. She received her M. D. degree from Beijing Medical University in Beijing of China.

Fang Wen, MD, Ph.D.

Uropathologist

Dr. Wen is a board certified pathologist. She completed her anatomic and clinical pathology residency at University of Missouri, Columbia and University of California, San Diego, followed by a genitourinary pathology/surgical pathology fellowship at University of California, Los Angeles. She received her medical degree from Peking Union Medical College in China. She received her Ph. D. degree in Molecular Pathology at University of California, San Diego.

Hach Turyan, M.D.

Surgical Pathologist, Hematopathologist

Dr. Turyan is a board certified pathologist specializing in durgical pathology and hematopathology. He completed his anatomic and clinical pathology residency at the SUNY at Brooklyn, followed by a surgical pathology fellowship at Winthrop University Hospital and hematopathology fellowship at the Medical University of South Carolina. He received his medical degree from the Azerbaijan State Medical University, Baku Azerbaijan. He is a member of the College of American Pathologists (CAP), the American Society of Clinical Pathologists (ASCP), and the American Society of Hematology (ASH).

Yiqiu Zhang, M.D.

Dermatopathologist

Dr. Zhang is a board certified pathologist specializing in dermatopathology.  She completed her anatomic and clinical pathology residency at The New York Hospital Medical Center of Queens, affiliated with New York Presbyterian Hospital-Weill Cornell Medical Center, followed by a surgical pathology fellowship at Memorial Sloan-Kettering Cancer Center in New York and dermatopathology fellowship at New York Presbyterian Hospital-Weill Cornell Medical College.  She received her medical degree from Fu-Dan University/ Shanghai Medical University in Shanghai, China.  She is a member of the College of American Pathologists (CAP), the American Society of Clinical Pathologists (ASCP), and the American Society of Dermatopathology (ASD).

Andrey Gritsman, M.D., Ph.D.

Surgical pathologist and Cytopathologist

Board certified in Anatomic and Clinical Pathology and Cytopathology. Following his Cancer Research fellowship at NCI, NIH he completed his Anatomic and Clinical Pathology residency at the George Washington University Medical Center, followed by Oncologic Pathology fellowship at M.D. Anderson Cancer Center in Houston, TX. His areas of subspecialty are Breast, GYN and FNA Cytopathology. He received his M.D. degree and Ph.D. in Immunopathology from the 1st Moscow Medical Institute. He is a member of the College of American Pathologists, the  American Society of Clinical Pathologists and the New York Metropolitan Breast Cancer society.

Renuka Kulkarni, M.D.

Surgical Pathologist

Dr. Kulkarni completed her anatomic and clinical pathology residency at Saint Barnabas Medical Center, Livingston, New Jersey followed by a surgical pathology fellowship at Medical College of Georgia, Augusta. She received her medical degree from JJMM Medical College, India.  Dr. Kulkarni has expertise in the area of surgical pathology, immunohistochemistry, breast prognostic markers and applications of whole slide imaging and image analysis. She is a member of the College of American Pathologists, the American Society of Clinical Pathologists.

Lihong Xia, M.D.

Surgical Pathologist and Cytopathologist

Dr. Lihong Xia is a board-certified pathologist specialized in cytopathology. She completed her anatomic and clinical pathology residency at Hartford Hospital, followed by a cytopathology fellowship at the same hospital and surgical pathology fellowship at the University of Texas Medical Branch. She received her medical degree from Tongji Medical University in China. She is a member of the American Society of Clinical Pathologists (ASCP).

Rebecca B. Vergara, M.D.

Surgical Pathologist and Cytopathologist

Board certified in Anatomic and Clinical Pathology and Cytopathology. She completed her training at St. Barnabas Medical Center in Livingston, New Jersey.  She received her medical degree from The University of the Philippines, College of Medicine, Philippines. She is a member of the College of American Pathologists (CAP), Unites States and Canadian Academy of Pathology (USCAP) and the AMA. Has been in active practice of the specialty for 32 years.

Dr. Emil Petrov, M.D.

Surgical Pathologist

Dr. Petrov is a Staff Surgical Pathologist in Bio Reference Laboratories, who was board certified in Anatomic Pathology in 2006. He has completed his Anatomic and Clinical Pathology residency in St. Vincent’s Hospital and MC in New York, NY, followed by Surgical Pathology Fellowships in SUNY Health Science Center in Brooklyn, NY and Staten Island University Hospital in Staten Island, NY. He has received his General Practitioner Degree at VMI Pleven Medical University, in Pleven, Bulgaria. He is a member of College of American Pathology.

Yu Chen M.D.

Anatomic and Clinical Pathologist

Dr. Chen is a board certified anatomic and clinical pathologist. She completed his anatomic and clinical pathology residency at the Long island Jewish Medical Center, followed by a surgical pathology fellowship at the New York University School of Medicine. She received her medical degree (MD) and master degree (MS) from the China Medical University in Shenyang, China.

Jeffrey Brown, M.D.

Uropathologist

Dr. Brown is a board certified pathologist specializing in uropathology. He completed his anatomic and clinical pathology residency at St. Luke’s-Roosevelt Hospital, New York, NY and completed a uropathology fellowship at Cedars-Sinai Hospital, Los Angeles. He also completed an Oncologic Surgical Pathology Fellowship at Memorial Sloan-Kettering, New York, NY. He received his medical degree from the University of Michigan Medical School. He is a member of the United States and Canadian Academy of Pathology (USCAP).

Liang Liu, MD, Ph.D.

GI Pathologist and Surgical Pathologist

Dr. Liu is a board certified pathologist specializing in Gastrointestinal pathology. He completed his anatomic and clinical pathology residency at the State University of New York at Buffalo, Buffalo, New York, followed by a gastrointestinal pathology fellowship at Baylor College of Medicine, Houston, Texas. He received his medical degree from the China Medical University, Shenyang, CHINA. He is a member of the College of American Pathologists (CAP), the United States and Canadian Academy of Pathology (USCAP), the American Society of Clinical Pathologists (ASCP), and the American Gastroenterological Association (AGA).

Songyang Yuan, M.D., Ph.D.

Surgical and Cytopathologist

Board certified in Anatomic and Clinical Pathology and Cytopathology. He completed his anatomic and clinical pathology residency at the SUNY Downstate Health Sciences University in Brooklyn, and followed by cytopathology fellowship at the Mount Sinai Hospital in New York. He is a well-rounded practicing pathologist with a special interest in GI pathology, GYN pathology and cytopathology. He received his M.D. degree from the Henan Medical University in China and earned his Ph.D. degree in Pathology from the McGill University in Canada. He is a member of the College of American Pathologists and the United States and Canadian Academy of Pathology.