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About Us

PsiGenex is a Premier Genetic Testing Laboratory

Genetic testing can help people grow their families, make informed decisions about their health care, and live longer, healthier lives. We believe that every patient should have access to comprehensive genetic testing. That is why PsiGenex is dedicated to providing patient education, affordable testing, and reliable results.  

We aim to empower healthier lives through genetic testing.

Meet Our Medical Leadership

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Dr. Sherif Ibrahim, MD, PhD

Founder and Chief Medical Officer

Dr. Ibrahim is recognized nationally as an expert in the field of Hematopathology and Molecular Pathology. Dr. Ibrahim previously held several positions at NYU School of Medicine and Hospitals (2001-2017), including Adjunct Professor, Director of Hematopathology/Molecular Pathology and Director of the Hematopathology Fellowship Program. He also served as a Hematopathology Consultant at Memorial Sloan-Kettering Cancer Center from 2008 to 2017.

He performed his Hematopathology Fellowship at the M D Anderson Cancer Center. Dr. Ibrahim contributed to the scientific literature in the field of Hematology and Oncology more than 60 peer-reviewed articles and several book chapters and presentations in Hematopathology and Molecular Pathology Dr. Ibrahim is routinely engaged by other pathologists and physicians to render second opinions on the most difficult to diagnose leukemia and lymphoma cases.

During his time as Director of Molecular Pathology, Dr Ibrahim was one of the first adaptors of next generation sequencing technology. He saw clearly that NGS could bring new possibilities to cancer care and so with the desire to give all patients access to comprehensive genetic testing, Dr. Ibrahim launched a subsidiary lab, PsiGenex, which will provide the same high level service to women’s health and beyond.

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Dr. Dalia Abdel Azim, MD, PhD

Board Certified Molecular Genetics Pathologist and Hematopathologist

Dr. Azim received her PhD from the Department of Cancer Studies and Molecular Medicine, University of Leicester, UK in the field of Molecular Profiling of Diffuse Large B-Cell Lymphoma. She did her residency training in Anatomic and Clinical Pathology at the University of South Alabama, 2015. She finished her training as a Hemtopathology fellow at the New York University (NYU) – Langone in 2016, followed by fellowship in Molecular Genetics Pathology at The University of Nebraska in 2017. She served as the Director of Molecular Diagnostics and Hematopathologist at NYU-Winthrop University Hospital from 2017-2019 until joining PsiGenex.

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Dr. Wissam Hamou, PhD

Director of Molecular Biology

Dr. Hamou has extensive experience in technology development in Next Generation Sequencing at Mount Sinai Hospital developing dozens of diagnostic genetic tests on NGS platforms. He then transitioned into the clinical aspect of Genetic testing using the panels he developed. Dr Hamou received his PhD in Molecular Development Biology from the Icahn School of Medicine at Mount Sinai. He also received his Masters in Molecular Biology and Genetics from Paris 7 University.

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Dr. Bixia Xiang, PhD, FACMGG

Director of Cytogenetics and PGT

Dr. Xiang previously held several positions at NexGenomics, HRC fertility (2015-2019), Ecahn School of Medcine at Mount Sinai (2015-2018), BayCare Medical Group (2014-2015), City of Hope Medical Center (2010-2013), University of Miami Medical center (2008-2010), Including Associate Professor, Director of Cytogenetics and Cytogenomics, Director of PGT-A. She has served as a Medical Genetics Consultant at BGI since 2017. Dr. Xiang is an ABMGG Board-Certified Cytogeneticist with over ten years’ experience in Cytogenetics of Oncology and Hematology and is a recognized expert in the field of arrayCGH clinical application on both Constitutional (Prenatal and Postnatal) and Cancer fields. She performed her Molecular Cytogenetics Fellowship at School of Medicine, Yale University. Dr. Xiang contributed to the scientific literature in the field of Molecular Cytogenetics more than 40 peer-reviewed articles and presentations; Dr. Xiang is also an Ad Hoc Reviewer for several Molecular Cytogenetics journals.

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Kristen Meijs, MS, CGC

Medical Science Liaison Director
Genetic Counselor

Kristen Meijs is a Board Certified genetic counselor with over 11 years of experience in both clinical and laboratory settings. She spent the majority of her career as a prenatal genetic counselor for Baylor Medical Genetics placed in Lenox Hill Hospital in New York City, where she counseled a large volume of high risk patients and managed all operations of the genetic counseling clinic. In 2017, Kristen expanded her experience by transitioning to a laboratory setting and joined Eurofins Clinical Diagnostics as a medical science liaison. There, she used her expertise to drive test development and sales of all genetic testing in reproductive health and oncology.  She joined PsiGenex in 2020 to ensure a successful launch into hereditary testing and will be supporting lab operations and customers.

Kristen received her BS in Genetics from North Carolina State University and her MS in Genetic Counseling from Brandeis University. She is certified through the American Board of Genetic Counseling and has multiple publications in the areas of prenatal diagnosis and maternal-fetal health.


Meet Our Business Leadership

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Nisren ElShazly

Vice President of Operations

Nisren ElShazly is an Executive Leader, MBA, with 10 + years of progressive experience leading enterprise business operations and international organizations. Currently she leads PsiGenex’s Operations and Expansion Initiatives on both technical and non-technical levels. Previous experience includes roles leading global business optimization initiatives across all major functional areas including sales, marketing, logistics, quality assurance, finance, billing, customer relationship management and consulting for start-ups. Nisren continuously focuses on delivering financial impacts by driving growth, reducing costs, and increasing client satisfaction rates. Nisren holds a B.S in Marketing with a minor in Biomedical Engineering and an MBA from the New Jersey Institute of Technology.

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Tod Schild

 Vice President – Business Development

Tod Schild is a career sales and marketing executive with 30 years of notable success in sales and management in the clinical laboratory field. Before joining PsiGenex in January 2020, he headed lab commercial operations for Shiel Medical Laboratory, resulting in their significant growth, rise to prominence, and eventual acquisition by Quest Diagnostics. Tod is a graduate Of Baruch College (CUNY) with a Bachelors of Business Administration (BBA) degree.

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Filip Cacinovic

Director of Revenue Cycle

Filip Cacinovic is an experienced medical billing consultant and is responsible for all laboratory revenue streams. He was instrumental in the formation and development of the parent company, Cairo Diagnostics in 2013, where he still holds his position as the Director of Revenue Cycle. Filip brings a wide breadth of experience and knowledge of laboratory operations, income streams and risk mitigation. He has multiple publications in Nuclear Medicine across several major journals, most notably the European Journal of Nuclear Medicine. He holds a B.S. in Mathematics from Northeastern University with a focus on Risk Management.

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Ahmed Mostafa

Director of Sales & Marketing

Ahmed Mostafa oversees the development and growth of the sales organization and leads all Marketing efforts to build the product portfolio and branding of PsiGenex. Ahmed is a result driven healthcare sales executive with over 12 years experience in new business development and sales leadership. He previously served as the National Sales Manager at siParadigm Diagnostics resulting in their significant growth to become the 5th largest hematopathology lab in the US. Ahmed was part of the new product development team at siParadigm that successfully launched a hereditary cancer panel. He has an entrepreneurial spirit and has co-founded and served as Sales and Marketing director of a mobile diagnostic services company as well as Zollect, a healthcare technology startup. Ahmed holds a B.S. in Bio-Medical Engineering and earned his MBA in Marketing from Stony Brook University.