About
Dr. Cassie Hajek brings nationally recognized expertise in preventive, personalized, and longevity medicine to Healthspan Medical. She trained in internal medicine at Montefiore Medical Center and completed a Medical Genetics fellowship at UCLA. Her career has centered on integrating advanced genetic science into meaningful patient care. She previously led genomic programs that connected cutting-edge genetics to clinical decision-making. Today she serves as Medical Director at Helix alongside her physician leadership role at Healthspan Medical. Dr. Hajek is passionate about helping patients understand their own biology. Her work focuses on reducing disease risk and extending healthspan through precision, evidence-guided care.
Education & Training
Residency
Internal Medicine, Montefiore Medical Center
Fellowship
Medical Genetics, UCLA
Additional Training
Medical Director at Helix; previously led innovative genomic programs integrating advanced genetics into patient care
Who is Dr. Hajek right for?
Dr. Hajek is a strong fit for adults who want physician-guided, precision-based longevity care. Patients with family histories of genetic disease or chronic illness benefit from her medical genetics background. She works well with individuals seeking to understand their biology at a deep, evidence-based level. Those pursuing proactive disease prevention rather than reactive treatment will find her approach well-matched to their goals.
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Frequently Asked Questions
Dr. Hajek practices internal medicine, preventive medicine, and functional medicine. She also holds deep expertise in medical genetics, which she applies to personalized longevity and disease risk reduction.
Dr. Hajek completed her internal medicine residency at Montefiore Medical Center. She then went on to complete a Medical Genetics fellowship at UCLA.
Dr. Hajek is a nationally recognized leader in preventive and personalized medicine with training in internal medicine and medical genetics from major academic medical centers.
Dr. Hajek focuses on helping patients understand their biology, reduce disease risk, and extend their healthspan. She uses advanced diagnostics and precision medicine to build individualized longevity strategies.
Genetics is central to Dr. Hajek's clinical approach. Her fellowship at UCLA and her work leading genomic programs give her the expertise to incorporate genetic insights directly into patient care planning.
Dr. Hajek serves as Medical Director at Helix, a genomics company. She brings that expertise in precision medicine and genetic science directly to her work at Healthspan Medical.
Dr. Hajek works with adults committed to proactive health management. Her patients typically seek to understand their genetic risks, optimize long-term performance, and delay the onset of age-related disease.
Doctor profile last updated June 9, 2026