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John Eichwald is the Team Lead for CDC’s EHDI Program.  In this position he oversees various EHDI activities including collaboration with federal, national, and state agencies and organizations to help states and territories develop standardized procedures for newborn hearing screening tracking, surveillance, data collection and management.  John has more than thirty years’ experience in the field of Pediatric Audiology. He is a member of the Joint Committee on Infant Hearing and sits on a several Health Information Technology committees related to newborn screening.

Eric Cahill, MS has been with the CDC EHDI Team since 2009.  As a Health Scientist, Eric provides technical assistance to state EHDI programs and investigates public health related issues for the team.  Before coming to CDC, Eric served in the EHDI program for the state of Kentucky.  He originally trained as a clinical audiologist and has worked at Temple University Hospital, Temple University Children’s Medical Center and Children’s Hospital Boston.

Winnie Chung, Au.D, Health Scientist with CDC EHDI since 2009, was a clinical audiologist in various settings from 1990 to 2009. She began her involvement in EHDI in 2001 providing outpatient hearing screening and audiologic evaluation for newborns at Kaiser Permanente San Francisco and Oakland. From 2004 to 2009, besides coordinating Rhode Island state newborn hearing screening program, she also provided audiological services in the tertiary neonatal intensive care unit and managed the audiology outpatient clinic at Woman & Infants' Hospital. She provides technical assistance to state EHDI programs and investigates public health related issues for the team.

Xidong Deng joined CDC EHDI in June 2008 and is currently a health scientist (informatics) with the team. She holds a Ph.D. in Computer Science and Engineering from the Pennsylvania State University. Her current interests are in controlled vocabulary and data standards, distributed computing, interoperability and health information exchange, Electronic Health Record (EHR) systems, and evaluation of health information systems.

Claudia Gaffney joined the EHDI Team in 2004. In this position she has developed materials and programs to help educate minorities and expand a public health initiative within hard-to-reach populations by producing educational materials in Spanish, disseminating critical information and creating partnerships at both state and national levels. Prior to her employment at CDC, she created, supervised and evaluated oral health prevention programs for rural communities in her home country of Colombia. She received her degree in Dentistry from Autonoma University of Manizales, Colombia in 1996 and a Master’s degree in Public Health from Mercer University in 2004.

Marcus Gaffney is a Health Scientist with the EHDI Team with over 10 years’ experience working in the area of newborn hearing screening. He is responsible for the collection, analysis, and interpretation of data from across the U.S. and the reporting of progress towards national goals. In addition, he is involved in the development and management of informatics initiatives and projects to improve the quality of EHDI data and ensure children receive recommended hearing related services. He holds a Masters of Public Health from Mercer University.     

Deidra Green, as a Public Health Advisor on the CDC EHDI Team, works with the Team Lead to implement and administer overall program activities, and to manage the team’s budget.  Before joining the EHDI team, she served with the National Center for HIV, Viral Hepatitis, STD, and TB Prevention (NCHHSTP), first with the STD program assigned to several state health departments and later with HIV for 24 years.  She has a Master of Public Health in Epidemiology from Tulane University.

Stephanie Henry serves as Program Consultant on the Early Hearing Detection and Intervention Team.  In this role she is responsible for non-scientific management, planning, development, and administration of EHDI extramural grants, cooperative agreements, interagency agreements, and contracts.  Stephanie has over fifteen years of programmatic and administrative management experience, including advising senior management on financial management, human resources, procurement and other resource utilization activities.

Craig A. Mason, PhD is a Professor of Education and Applied Quantitative Methods at the University of Maine, where he also serves as the Director of the Center for Research and Evaluation.  He has been a data/ informatics consultant to the CDC EHDI team since 2004.  He has made numerous presentations on informatics and statistical analysis at the invitation of the Centers for Disease Control and Prevention, the Association of Maternal and Child Health Programs, the U.S. Department of Health and Human Services, the Association of University Centers on Disabilities, and the National Association for Public Health Statistics and Information Systems. 

Steve Richardson, MPH is a health educator with over 30 years’ experience including service in a state health department, an academic medical center and private consulting. He has worked in the areas of maternal and child health, injury prevention, environmental health and risk communication. At CDC’s EHDI program he is involved with special topics teleconferences and print and web-based/electronic information, helping state and federal colleagues apply human factors and marketing principles to their health communications, especially with family and professional audiences.  In addition, he serves on CDC’s Public Health Ethics Committee.

Sharon Ringwalt, Ph.D., CCC-SLP is Technical Assistance Specialist with the National Early Childhood Technical Assistance Center (NECTAC) and on a temporary assignment for consultation services on the CDC EHDI Team. In addition to her position at NECTAC, Dr. Ringwalt serves as an Early Childhood Technical Assistance Service Coordinator for the Mid-South Regional Resource Center, providing negotiation, coordination and delivery of technical assistance for Part C and Section 619 to 8 states and the District of Columbia since 2002. She obtained her Doctorate in Public Policy Analysis (UNC), a Masters in Speech-Language Pathology (Vanderbilt) and double Bachelor degrees in Speech Communication and Psychology (UNC). She holds an ASHA Certificate of Clinical Competence in Speech-Language Pathology (CCC-SLP). Dr. Ringwalt’s areas of expertise and interest include communication disorders, early identification, and interagency relationships, especially the functioning of State Interagency Coordinating Councils.


For the convenience of our participants with hearing loss, a real-time web based captioning service is available for CDC EHDI teleconferences. A Caption Writer listens to the spoken comments from the teleconference and immediately types the comments into a computer. By logging into a special website, participants with hearing loss can view the comments as the Caption Writer records them. Users of this caption service can also type their questions or comments directly to the Caption Writer, who in turn will voice these comments to the rest of the teleconference participants. Those interested in using this caption service for the teleconference should email with their name and email address to receive the login information for the translation website.

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