Medical Directors

From great experience comes a great experience

Leo Lombardo, M.D.
National Medical Director

Dr. Leo Lombardo is a physician in active practice and board certified in both Anesthesiology and Pain Medicine. He holds B.A. and B.S. degrees from Stanford University and received his medical degree from the University of California, San Diego. While attending medical school, Dr. Lombardo was awarded the School of Medicine Dean’s Scholarship, the Pharmacology Education and Research Foundation Award and was a member of the Gold Humanism Honor Society. In addition to completing his internship in Internal Medicine and residency in Anesthesiology, he pursued fellowship training in Pain Medicine. Dr. Lombardo specializes in interventional pain management and multidisciplinary approaches to chronic pain. He maintains clear and active licenses in the states of California, Texas and Colorado. He is experienced in Disability, Worker’s Compensation, Automotive cases and Group Health. In addition, he is Colorado Worker’s Compensation (Level 1) accredited. He is also bilingual (English and Japanese).

Matthew Lundquist, M.D.
Medical Director (Disability)

Dr. Lundquist provides medical oversight over Dane Street’s Disability program. He is board certified by both the American Board of Internal Medicine and the American Board of Preventive Medicine in occupational medicine. He completed his internal medicine residency and occupational and environmental medicine fellowship at Yale University, where he also earned a Master of Public Health. Dr. Lundquist received his medical degree from Stony Brook University Medical Center School of Medicine.

Dr. Lundquist is currently a member of both the American College of Occupational and Environmental Medicine and the New England College of Occupational and Environmental Medicine. He recently served as the President of the New England College of Occupational and Environmental Medicine from 2018-2020. He is specifically interested in public health, employer wellness programs and the role of insurance in health care. Dr. Lundquist resides in Connecticut and interacts closely with our Physician Panel and Quality Assurance staff in Palm Beach Gardens, FL.

Alex Williams, Ph.D.
Medical Director – Behavioral Health (Disability)

Dr. Williams currently serves as the Psychology Program Director and Director of the Psychological Clinic at Edwards Campus of the University of Kansas. He is also a teaching professor at the University, where he provides direct patient services, clinical supervision and interdisciplinary consultation. Alex has strong experience conducting independent medical exams, writing medical opinions, and performing case reviews and has over 10 years of clinical experience.

Prior to receiving his Doctorate from the University of Kansas, he graduated Summa Cum Laude from William Jewell College in Liberty, MO. Dr. Williams is a licensed psychologist in Missouri and Kansas.

In his role, Dr. Williams works closely with Dane Street’s Operational and Clinical teams, as well as with our Disability physician panel specialists to positively impact the quality of our reports and overall program metrics.

Ilyse Rosenberg, D.O.
Medical Director – Behavioral Health (Group Health)

Dr. Ilyse Rosenberg is a physician in active practice and board certified in Psychiatry. She holds a B.S. from NYU and a Masters in Library Science from CUNY Queens College. She received her medical degree from the University of Medicine and Dentistry of New Jersey/Rowan University.

While attending college, she received Magna Cum Laude Phi Beta Kappa, Dean’s Honors Program, and Dean’s scholarship to Africa and China. She worked at Memorial Sloan Kettering Cancer Center in patient education. She completed her internship and residency in Psychiatry at Beth Israel Medical Center in New York City. While in residency she was an honored Reviewer at The American Journal of Psychiatry and General Hospital Psychiatry. She received the Research Fellowship at The Family Center for Bipolar Disorder and the Cynthia Horner Research Award at Beth Israel Medical Center in NYC. She has published case reports in the American Journal of Psychiatry, General Hospital Psychiatry, and Clinical Geriatrics.

She maintains clear and active licenses in the states of Washington, Arizona, New York, and Minnesota and is domiciled in Washington. She has presented posters at The American Association of Geriatric Psychiatry, American Psychiatric Association Annual Meeting, and the Eighth Annual International Conference on Bipolar Disorder. She has clinical expertise with child and adolescent psychiatry, and psycho-oncology, autism and bipolar disorder.

Mark H. Enker, M.D., M.B.A.
Medical Director (Group Health)

Dr. Mark Enker is a Critical Care Medicine Specialist who provides medical oversight over Dane Street’s Group Health Review Program.

Mark Enker, MD is a board-certified Anesthesiologist and Critical Care Intensivist. He served his residency in Anesthesiology from 2004-2008 followed by a fellowship in Critical Care Medicine at Vanderbilt University Medical Center after receiving his Medical Degree at SUNY Downstate College of Medicine in 2004. Dr. Enker obtained an MBA degree from the University of Oregon.

Mark Enker has a special interest in innovative health technology. His clinical work has encompassed comprehensive anesthesia, critical care, and tele-critical care medicine work at various community hospitals, tertiary referral care centers, and LTACs. During his clinical work, Dr. Enker has served as a Physician Advisor, Chair of Utilization Management and Bioethics committees. Dr. Enker's clinical experiences have led to clinical and consulting opportunities in telemedicine.

He resides in Oregon and works closely with Dane Street’s clinical and Operations teams for our Group Health division.

Laura Swan, M.D.
Medical Director (Group Health)

Laura Swan, M.D. is a board-certified pediatrician and fellow of the American Academy of Pediatrics. She is a graduate of the University of Vermont Medical School and attended the University of Pennsylvania for her undergraduate studies. Dr. Swan trained at the University of Virginia in the Pediatrics department during her residency.

Dr. Swan has spent much of her career working in the health plan space. She has a great deal of experience with Medicaid, Medicare, and Children’s Health Insurance Programs. She is well versed in policy development and regulatory compliance for local and national levels.

She resides in Pennsylvania and takes an active role with training, working closely with Dane Street’s Group Health Panel, Operational and Clinical teams.