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Specializing in the treatment of sleep disorders
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Meet Our Team

OBrien

James O’Brien, MD, FCCP, FAASM
Medical Director

Dr. O’Brien first became involved in sleep medicine more than 20 years ago when he noticed that many of his patients actually harbored undiagnosed sleep disorders. Once tested and treated, many of these patients improved dramatically and experienced a greater than anticipated clinical result. These early patient experiences shifted his medical focus toward sleep disorders and achieving healthy sleep for his patients.

Dr. O’Brien earned his medical degree from New York Medical College and completed his internal medicine, pulmonary, and sleep medicine training in the Boston area. Throughout his career, Dr. O’Brien has lectured innumerable times to health care professionals both in the US and Germany about sleep disorders.

Klapper

David Klapper, MD

David Klapper, MD is a board-certified sleep medicine physician. He joins the ProHealth Sleep Center with extensive clinical experience. Dr. Klapper has worked in many esteemed locations such as Boston Medical Center, Brigham and Women’s Hospital, and Jackson Memorial Hospital. On top of working for ProHealth, he is the owner and medical director of the sleep center at Sleep Medicine of Riverdale in Riverdale, NY and practices at Manhattan Sleep Medicine and Neurology Consultant, PC. Dr. Klapper is also board certified in neurology.

Woznica

Margaret Woznica, MD

Dr. Woznica is board certified in internal medicine and sleep medicine. Her extensive medical career has allowed her to gain experience in vast specialties. She is eager to be a partner to primary care physicians to help improve the many patients’ lives they care for, and believes sleep medicine plays a large part in the overall health of a patient.

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Ellen Beth, PA-C

Ellen Beth, PA-C is board certified through the National Commission of Certification of Physician Assistants and has a background in Primary Care and Urgent Care. She is excited to be practicing Sleep Medicine because she really enjoys hearing about improvements that patients experience, and also likes having data available to show the success of treatments. Ellen tries to take the time to educate patients on their condition so that they are able to participate in decisions involving care. In her free time Ellen loves to run, hike, and participate in snow sports.  

Bestman

Nátesha Bestman, APRN

Nátesha is a board certified nurse practitioner, with a special interest in sleep medicine and a background in family/community health medicine. She has an interest in caring for individuals across their lifespan—to treat a variety of acute and complex health problems. Nátesha believes sleep medicine plays a major role in one’s overall health.

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Margaret Brigham, APRN

Margaret Brigham, APRN is certified as a family nurse practitioner with the American Nurses Association. Before becoming a Nurse Practitioner, Margaret recieved her undergraduate degree in French and English from the University of Vermont. She then taught kindergarten and counseled teenagers in Greenwich, Connecticut. She attended graduate school at Yale University in New Haven. Margaret is married and has three children.

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Joanna Wroblewski, APRN

Joanna is a board certified nurse practitioner. Prior, Joanna was a registered nurse for 15 years and worked in a variety of clinical settings. Joanna loves taking care of her patients and believes that trust and communication are key concepts of improving and sustaining high quality care.

Urso

Rocco Urso
Director of Sleep Medicine

Rocco has been the Director of the ProHealth Sleep Center since 2013. He graduated from CCSU with a BS in Education/Athletic Training and from UConn with a BS in Allied Health. He is a registered Physical Therapist in the State of Connecticut. He has been managing diverse health care operations for over 15 years. He has been instrumental in introducing the Home Sleep Testing and growing the community outreach program. He resides in West Hartford with his wife and two children.

Deitch

Jessica Deitch
Practice Manager

Jessica joined the Sleep Center in 2011 as the office Medical Assistant, after studying at Branford Hall. In 2014, Jessica became the Manager of Ancillary Sleep Services to support the growth of the Home Sleep Testing program and community outreach efforts. In 2017, she became the program Practice Manager.  She enjoys spending time with her husband and daughter, as well as family and friends.